diff --git a/components/openssh.yml b/components/openssh.yml index 3298afea093..653aa424a4e 100644 --- a/components/openssh.yml +++ b/components/openssh.yml @@ -11,12 +11,15 @@ packages: rules: - disable_host_auth - file_groupowner_sshd_config +- file_groupowner_sshd_drop_in_config - file_groupownership_sshd_private_key - file_groupownership_sshd_pub_key - file_owner_sshd_config +- file_owner_sshd_drop_in_config - file_ownership_sshd_private_key - file_ownership_sshd_pub_key - file_permissions_sshd_config +- file_permissions_sshd_drop_in_config - file_permissions_sshd_private_key - file_permissions_sshd_pub_key - file_sshd_50_redhat_exists diff --git a/controls/stig_rhel9.yml b/controls/stig_rhel9.yml index c606f5f5b46..1a63bee32be 100644 --- a/controls/stig_rhel9.yml +++ b/controls/stig_rhel9.yml @@ -2,7 +2,7 @@ policy: 'Red Hat Enterprise Linux 9 Security Technical Implementation Guide' title: 'Red Hat Enterprise Linux 9 Security Technical Implementation Guide' id: stig_rhel9 source: https://public.cyber.mil/stigs/downloads/ -version: V2R1 +version: V2R3 reference_type: stigid product: rhel9 levels: @@ -17,6 +17,11 @@ controls: - enable_authselect - var_authselect_profile=sssd + - id: RHEL-09-171011 + levels: + - medium + rules: + - dconf_gnome_login_banner_text - id: RHEL-09-211010 levels: - high @@ -574,6 +579,22 @@ controls: - package_s-nail_installed status: automated + - id: RHEL-09-215100 + levels: + - medium + title: RHEL 9 must have the crypto-policies package installed. + rules: + - package_crypto-policies_installed + status: automated + + - id: RHEL-09-215105 + levels: + - medium + title: RHEL 9 must implement a FIPS 140-3 compliant systemwide cryptographic policy. + rules: + - configure_crypto_policy + status: automated + - id: RHEL-09-231010 levels: - medium @@ -1077,8 +1098,22 @@ controls: title: RHEL 9 /etc/group- file must be owned by root. rules: - file_owner_backup_etc_group + + - id: RHEL-09-232103 + title: RHEL 9 "/etc/audit/" must be owned by root. + levels: + - medium + rules: + - file_ownership_audit_configuration status: automated + - id: RHEL-09-232104 + title: RHEL 9 "/etc/audit/" must be group-owned by root. + levels: + - medium + rules: + - file_groupownership_audit_configuration + - id: RHEL-09-232105 levels: - medium @@ -1834,7 +1869,13 @@ controls: - harden_sshd_ciphers_openssh_conf_crypto_policy - sshd_approved_ciphers=stig_rhel9 status: automated - + - id: RHEL-09-255064 + title: The RHEL 9 SSH client must be configured to use only DOD-approved encryption ciphers employing FIPS 140-3 validated cryptographic hash algorithms to protect the confidentiality of SSH client connections. + levels: + - medium + rules: + - harden_sshd_ciphers_openssh_conf_crypto_policy + - sshd_approved_ciphers=stig_rhel9 - id: RHEL-09-255065 levels: - medium @@ -1844,6 +1885,13 @@ controls: rules: - harden_sshd_ciphers_opensshserver_conf_crypto_policy status: automated + - id: RHEL-09-255070 + levels: + - medium + title: The RHEL 9 SSH client must be configured to use only DOD-approved Message Authentication Codes (MACs) employing FIPS 140-3 validated cryptographic hash algorithms to protect the confidentiality of SSH client connections. + rules: + - sshd_use_strong_macs + - sshd_strong_macs=stig_rhel9 - id: RHEL-09-255075 levels: @@ -1851,7 +1899,9 @@ controls: title: RHEL 9 SSH server must be configured to use only Message Authentication Codes (MACs) employing FIPS 140-3 validated cryptographic hash algorithms. - status: pending + status: automated + rules: + - configure_ssh_crypto_policy - id: RHEL-09-255080 levels: @@ -1909,6 +1959,7 @@ controls: title: RHEL 9 SSH server configuration file must be group-owned by root. rules: - file_groupowner_sshd_config + - file_groupowner_sshd_drop_in_config status: automated - id: RHEL-09-255110 @@ -1917,6 +1968,7 @@ controls: title: RHEL 9 SSH server configuration file must be owned by root. rules: - file_owner_sshd_config + - file_owner_sshd_drop_in_config status: automated - id: RHEL-09-255115 @@ -1925,6 +1977,7 @@ controls: title: RHEL 9 SSH server configuration file must have mode 0600 or less permissive. rules: - file_permissions_sshd_config + - file_permissions_sshd_drop_in_config status: automated - id: RHEL-09-255120 @@ -2255,6 +2308,7 @@ controls: title: RHEL 9 must have the USBGuard package installed. rules: - package_usbguard_installed + - service_usbguard_enabled status: automated - id: RHEL-09-291020 @@ -2789,7 +2843,7 @@ controls: rounds. rules: - accounts_password_pam_unix_rounds_password_auth - - var_password_pam_unix_rounds=5000 + - var_password_pam_unix_rounds=100000 status: automated - id: RHEL-09-611055 @@ -3203,16 +3257,6 @@ controls: - rsyslog_remote_access_monitoring status: automated - - id: RHEL-09-652035 - levels: - - medium - title: - RHEL 9 must be configured to offload audit records onto a different system - from the system being audited via syslog. - rules: - - auditd_audispd_syslog_plugin_activated - status: automated - - id: RHEL-09-652040 levels: - medium @@ -3470,7 +3514,7 @@ controls: individuals or roles appointed by the ISSM) to select which auditable events are to be audited. rules: - - file_permissions_etc_audit_rulesd + - file_permissions_audit_configuration status: automated - id: RHEL-09-653115 @@ -4046,14 +4090,6 @@ controls: - set_password_hashing_algorithm_passwordauth status: automated - - id: RHEL-09-672010 - levels: - - medium - title: RHEL 9 must have the crypto-policies package installed. - rules: - - package_crypto-policies_installed - status: automated - - id: RHEL-09-672015 levels: - high @@ -4101,14 +4137,6 @@ controls: - configure_openssl_tls_crypto_policy status: automated - - id: RHEL-09-672045 - levels: - - medium - title: RHEL 9 must implement a system-wide encryption policy. - rules: - - configure_crypto_policy - status: automated - - id: RHEL-09-672050 levels: - medium diff --git a/linux_os/guide/auditing/auditd_configure_rules/file_permissions_audit_configuration/rule.yml b/linux_os/guide/auditing/auditd_configure_rules/file_permissions_audit_configuration/rule.yml index ec62b5078c9..deae50a8a88 100644 --- a/linux_os/guide/auditing/auditd_configure_rules/file_permissions_audit_configuration/rule.yml +++ b/linux_os/guide/auditing/auditd_configure_rules/file_permissions_audit_configuration/rule.yml @@ -22,6 +22,11 @@ identifiers: cce@rhel9: CCE-88002-1 cce@rhel10: CCE-88067-4 +references: + disa: CCI-000171 + nist: AU-12 b + srg: SRG-OS-000063-GPOS-00032 + ocil: |- {{{ describe_file_permissions(file="/etc/audit/", perms="0640") }}} {{{ describe_file_permissions(file="/etc/audit/rules.d/", perms="0640") }}} diff --git a/linux_os/guide/services/ssh/file_groupowner_sshd_drop_in_config/policy/stig/shared.yml b/linux_os/guide/services/ssh/file_groupowner_sshd_drop_in_config/policy/stig/shared.yml new file mode 100644 index 00000000000..3f40e2a39e9 --- /dev/null +++ b/linux_os/guide/services/ssh/file_groupowner_sshd_drop_in_config/policy/stig/shared.yml @@ -0,0 +1,19 @@ +srg_requirement: |- + {{{ full_name }}} SSH server configuration file must be group-owned by root. + +vuldiscussion: |- + Service configuration files enable or disable features of their respective services, which if configured incorrectly, can lead to insecure and vulnerable configurations. Therefore, service configuration files must be owned by the correct group to prevent unauthorized changes. + +checktext: |- + Verify the group ownership of the "/etc/ssh/sshd_config.d" directory and files under it with the following command: + + $ ls -al /etc/ssh/sshd_config.d/* + + rw-------. 1 root root 3669 Feb 22 11:34 /etc/ssh/sshd_config + + If the "/etc/ssh/sshd_config" file does not have a group owner of "root", this is a finding. + +fixtext: |- + Configure the "/etc/ssh/sshd_config" file to be group-owned by root with the following command: + + $ sudo chgrp -R root /etc/ssh/sshd_config.d diff --git a/linux_os/guide/services/ssh/file_groupowner_sshd_drop_in_config/rule.yml b/linux_os/guide/services/ssh/file_groupowner_sshd_drop_in_config/rule.yml new file mode 100644 index 00000000000..728da47adf8 --- /dev/null +++ b/linux_os/guide/services/ssh/file_groupowner_sshd_drop_in_config/rule.yml @@ -0,0 +1,46 @@ +documentation_complete: true + + +title: 'Verify Group Who Owns SSH Server config file' + +description: |- + {{{ describe_file_group_owner(file="/etc/ssh/sshd_config.d", group="root") }}} + +rationale: |- + Service configuration files enable or disable features of their respective + services that if configured incorrectly can lead to insecure and vulnerable + configurations. Therefore, service configuration files should be owned by the + correct group to prevent unauthorized changes. + +severity: medium + +identifiers: + cce@rhel9: CCE-86253-2 + cce@rhel10: CCE-86254-0 + +references: + cis-csc: 12,13,14,15,16,18,3,5 + cobit5: APO01.06,DSS05.04,DSS05.07,DSS06.02 + disa: CCI-000366 + isa-62443-2009: 4.3.3.7.3 + isa-62443-2013: 'SR 2.1,SR 5.2' + iso27001-2013: A.10.1.1,A.11.1.4,A.11.1.5,A.11.2.1,A.13.1.1,A.13.1.3,A.13.2.1,A.13.2.3,A.13.2.4,A.14.1.2,A.14.1.3,A.6.1.2,A.7.1.1,A.7.1.2,A.7.3.1,A.8.2.2,A.8.2.3,A.9.1.1,A.9.1.2,A.9.2.3,A.9.4.1,A.9.4.4,A.9.4.5 + nerc-cip: CIP-003-8 R5.1.1,CIP-003-8 R5.3,CIP-004-6 R2.3,CIP-007-3 R2.1,CIP-007-3 R2.2,CIP-007-3 R2.3,CIP-007-3 R5.1,CIP-007-3 R5.1.1,CIP-007-3 R5.1.2 + nist: AC-17(a),CM-6(a),AC-6(1) + nist-csf: PR.AC-4,PR.DS-5 + srg: SRG-OS-000480-GPOS-00227 + +ocil_clause: '{{{ ocil_clause_file_group_owner(file="/etc/ssh/sshd_config.d", group="root") }}}' + +ocil: |- + {{{ ocil_file_group_owner(file="/etc/ssh/sshd_config.d", group="root") }}} + +fixtext: '{{{ fixtext_file_group_owner(file="/etc/ssh/sshd_config.d", group="root") }}}' + +srg_requirement: '{{{ srg_requirement_file_group_owner(file="/etc/ssh/sshd_config.d", group="root") }}}' + +template: + name: file_groupowner + vars: + filepath: /etc/ssh/sshd_config.d/ + gid_or_name: '0' diff --git a/linux_os/guide/services/ssh/file_groupowner_sshd_drop_in_config/tests/ocp4/e2e.yml b/linux_os/guide/services/ssh/file_groupowner_sshd_drop_in_config/tests/ocp4/e2e.yml new file mode 100644 index 00000000000..b49fd368b98 --- /dev/null +++ b/linux_os/guide/services/ssh/file_groupowner_sshd_drop_in_config/tests/ocp4/e2e.yml @@ -0,0 +1,2 @@ +--- +default_result: PASS diff --git a/linux_os/guide/services/ssh/file_owner_sshd_drop_in_config/policy/stig/shared.yml b/linux_os/guide/services/ssh/file_owner_sshd_drop_in_config/policy/stig/shared.yml new file mode 100644 index 00000000000..1b586ca9036 --- /dev/null +++ b/linux_os/guide/services/ssh/file_owner_sshd_drop_in_config/policy/stig/shared.yml @@ -0,0 +1,19 @@ +srg_requirement: |- + {{{ full_name }}} SSH server configuration file must be owned by root. + +vuldiscussion: |- + Service configuration files enable or disable features of their respective services, which if configured incorrectly, can lead to insecure and vulnerable configurations. Therefore, service configuration files must be owned by the correct group to prevent unauthorized changes. + +checktext: |- + Verify the ownership of the "/etc/ssh/sshd_config.d" directory and files under it with the following command: + + $ ls -al /etc/ssh/sshd_config.d/* + + rw-------. 1 root root 3669 Feb 22 11:34 /etc/ssh/sshd_config + + If the "/etc/ssh/sshd_config" file does not have a owner of "root", this is a finding. + +fixtext: |- + Configure the "/etc/ssh/sshd_config" file to be owned by root with the following command: + + $ sudo chgrp -R root /etc/ssh/sshd_config.d diff --git a/linux_os/guide/services/ssh/file_owner_sshd_drop_in_config/rule.yml b/linux_os/guide/services/ssh/file_owner_sshd_drop_in_config/rule.yml new file mode 100644 index 00000000000..c33a6320ac7 --- /dev/null +++ b/linux_os/guide/services/ssh/file_owner_sshd_drop_in_config/rule.yml @@ -0,0 +1,47 @@ +documentation_complete: true + + +title: 'Verify Owner on SSH Server config file' + +description: |- + {{{ describe_file_owner(file="/etc/ssh/sshd_config.d", owner="root") }}} + +rationale: |- + Service configuration files enable or disable features of their respective + services that if configured incorrectly can lead to insecure and vulnerable + configurations. Therefore, service configuration files should be owned by the + correct group to prevent unauthorized changes. + +severity: medium + +identifiers: + cce@rhel9: CCE-86217-7 + cce@rhel10: CCE-86268-0 + + +references: + cis-csc: 12,13,14,15,16,18,3,5 + cobit5: APO01.06,DSS05.04,DSS05.07,DSS06.02 + disa: CCI-000366 + isa-62443-2009: 4.3.3.7.3 + isa-62443-2013: 'SR 2.1,SR 5.2' + iso27001-2013: A.10.1.1,A.11.1.4,A.11.1.5,A.11.2.1,A.13.1.1,A.13.1.3,A.13.2.1,A.13.2.3,A.13.2.4,A.14.1.2,A.14.1.3,A.6.1.2,A.7.1.1,A.7.1.2,A.7.3.1,A.8.2.2,A.8.2.3,A.9.1.1,A.9.1.2,A.9.2.3,A.9.4.1,A.9.4.4,A.9.4.5 + nerc-cip: CIP-003-8 R5.1.1,CIP-003-8 R5.3,CIP-004-6 R2.3,CIP-007-3 R2.1,CIP-007-3 R2.2,CIP-007-3 R2.3,CIP-007-3 R5.1,CIP-007-3 R5.1.1,CIP-007-3 R5.1.2 + nist: AC-17(a),CM-6(a),AC-6(1) + nist-csf: PR.AC-4,PR.DS-5 + srg: SRG-OS-000480-GPOS-00227 + +ocil_clause: '{{{ ocil_clause_file_owner(file="/etc/ssh/sshd_config.d", owner="root") }}}' + +ocil: |- + {{{ ocil_file_owner(file="/etc/ssh/sshd_config.d", owner="root") }}} + +fixtext: '{{{ fixtext_file_owner(file="/etc/ssh/sshd_config.d", owner="root") }}}' + +srg_requirement: '{{{ srg_requirement_file_owner(file="/etc/ssh/sshd_config.d", owner="root") }}}' + +template: + name: file_owner + vars: + filepath: /etc/ssh/sshd_config.d/ + fileuid: '0' diff --git a/linux_os/guide/services/ssh/file_owner_sshd_drop_in_config/tests/ocp4/e2e.yml b/linux_os/guide/services/ssh/file_owner_sshd_drop_in_config/tests/ocp4/e2e.yml new file mode 100644 index 00000000000..b49fd368b98 --- /dev/null +++ b/linux_os/guide/services/ssh/file_owner_sshd_drop_in_config/tests/ocp4/e2e.yml @@ -0,0 +1,2 @@ +--- +default_result: PASS diff --git a/linux_os/guide/services/ssh/file_permissions_sshd_config/rule.yml b/linux_os/guide/services/ssh/file_permissions_sshd_config/rule.yml index 85350fbd0f2..dbc791a3500 100644 --- a/linux_os/guide/services/ssh/file_permissions_sshd_config/rule.yml +++ b/linux_os/guide/services/ssh/file_permissions_sshd_config/rule.yml @@ -51,5 +51,7 @@ srg_requirement: '{{{ srg_requirement_file_permission(file="/etc/ssh/sshd_config template: name: file_permissions vars: - filepath: /etc/ssh/sshd_config + filepath: + - /etc/ssh/sshd_config + - /etc/ssh/sshd_config.d filemode: '0600' diff --git a/linux_os/guide/services/ssh/file_permissions_sshd_drop_in_config/policy/stig/shared.yml b/linux_os/guide/services/ssh/file_permissions_sshd_drop_in_config/policy/stig/shared.yml new file mode 100644 index 00000000000..ccdd4551a6b --- /dev/null +++ b/linux_os/guide/services/ssh/file_permissions_sshd_drop_in_config/policy/stig/shared.yml @@ -0,0 +1,20 @@ +srg_requirement: |- + {{{ full_name }}} SSH server configuration file must have mode 0600 or less permissive. + +vuldiscussion: |- + Service configuration files enable or disable features of their respective services that if configured incorrectly can lead to insecure and vulnerable configurations. Therefore, service configuration files should be owned by the correct group to prevent unauthorized changes. + +checktext: |- + Verify the permissions of the "/etc/ssh/sshd_config.d" file with the following command: + + $ ls -al /etc/ssh/sshd_config + + rw-------. 1 root root 3669 Feb 22 11:34 /etc/ssh/sshd_config.d + + If the "/etc/ssh/sshd_config" permissions are not "0600", this is a finding. + +fixtext: |- + Configure the "/etc/ssh/sshd_config.d" permissions to be "0600" with the following command: + + $ sudo chmod 0600 /etc/ssh/sshd_config.d + diff --git a/linux_os/guide/services/ssh/file_permissions_sshd_drop_in_config/rule.yml b/linux_os/guide/services/ssh/file_permissions_sshd_drop_in_config/rule.yml new file mode 100644 index 00000000000..4dae16b553c --- /dev/null +++ b/linux_os/guide/services/ssh/file_permissions_sshd_drop_in_config/rule.yml @@ -0,0 +1,46 @@ +documentation_complete: true + + +title: 'Verify Permissions on SSH Server config file' + +description: |- + {{{ describe_file_permissions(file="/etc/ssh/sshd_config.d", perms="0600") }}} + +rationale: |- + Service configuration files enable or disable features of their respective + services that if configured incorrectly can lead to insecure and vulnerable + configurations. Therefore, service configuration files should be owned by the + correct group to prevent unauthorized changes. + +severity: medium + +identifiers: + cce@rhel9: CCE-86216-9 + cce@rhel10: CCE-86442-1 + +references: + cis-csc: 12,13,14,15,16,18,3,5 + cobit5: APO01.06,DSS05.04,DSS05.07,DSS06.02 + disa: CCI-000366 + isa-62443-2009: 4.3.3.7.3 + isa-62443-2013: 'SR 2.1,SR 5.2' + iso27001-2013: A.10.1.1,A.11.1.4,A.11.1.5,A.11.2.1,A.13.1.1,A.13.1.3,A.13.2.1,A.13.2.3,A.13.2.4,A.14.1.2,A.14.1.3,A.6.1.2,A.7.1.1,A.7.1.2,A.7.3.1,A.8.2.2,A.8.2.3,A.9.1.1,A.9.1.2,A.9.2.3,A.9.4.1,A.9.4.4,A.9.4.5 + nerc-cip: CIP-003-8 R5.1.1,CIP-003-8 R5.3,CIP-004-6 R2.3,CIP-007-3 R2.1,CIP-007-3 R2.2,CIP-007-3 R2.3,CIP-007-3 R5.1,CIP-007-3 R5.1.1,CIP-007-3 R5.1.2 + nist: AC-17(a),CM-6(a),AC-6(1) + nist-csf: PR.AC-4,PR.DS-5 + srg: SRG-OS-000480-GPOS-00227 + +ocil_clause: '{{{ ocil_clause_file_permissions(file="/etc/ssh/sshd_config.d", perms="-rw-------") }}}' + +ocil: |- + {{{ ocil_file_permissions(file="/etc/ssh/sshd_config.d", perms="-rw-------") }}} + +fixtext: '{{{ fixtext_file_permissions(file="/etc/ssh/sshd_config.d", mode="0600") }}}' + +srg_requirement: '{{{ srg_requirement_file_permission(file="/etc/ssh/sshd_config.d", mode="0600") }}}' + +template: + name: file_permissions + vars: + filepath: /etc/ssh/sshd_config.d// + filemode: '0600' diff --git a/linux_os/guide/services/ssh/file_permissions_sshd_drop_in_config/tests/ocp4/e2e.yml b/linux_os/guide/services/ssh/file_permissions_sshd_drop_in_config/tests/ocp4/e2e.yml new file mode 100644 index 00000000000..b49fd368b98 --- /dev/null +++ b/linux_os/guide/services/ssh/file_permissions_sshd_drop_in_config/tests/ocp4/e2e.yml @@ -0,0 +1,2 @@ +--- +default_result: PASS diff --git a/linux_os/guide/services/ssh/ssh_server/sshd_use_strong_macs/rule.yml b/linux_os/guide/services/ssh/ssh_server/sshd_use_strong_macs/rule.yml index 95feba6c6de..149cac74859 100644 --- a/linux_os/guide/services/ssh/ssh_server/sshd_use_strong_macs/rule.yml +++ b/linux_os/guide/services/ssh/ssh_server/sshd_use_strong_macs/rule.yml @@ -31,6 +31,9 @@ references: cis@sle15: 5.2.14 cis@slmicro5: 5.2.14 cis@ubuntu2204: 5.2.14 + disa: CCI-001453 + nist: AC-17 (2) + srg: SRG-OS-000250-GPOS-00093 ocil_clause: 'MACs option is commented out or not using strong hash algorithms' diff --git a/linux_os/guide/services/ssh/sshd_approved_ciphers.var b/linux_os/guide/services/ssh/sshd_approved_ciphers.var index cedfd6a852e..5485055d396 100644 --- a/linux_os/guide/services/ssh/sshd_approved_ciphers.var +++ b/linux_os/guide/services/ssh/sshd_approved_ciphers.var @@ -13,7 +13,7 @@ interactive: false options: stig: aes256-ctr,aes192-ctr,aes128-ctr stig_extended: aes256-ctr,aes192-ctr,aes128-ctr,aes256-gcm@openssh.com,aes128-gcm@openssh.com - stig_rhel9: aes256-gcm@openssh.com,chacha20-poly1305@openssh.com,aes256-ctr,aes128-gcm@openssh.com,aes128-ctr + stig_rhel9: aes256-gcm@openssh.com,aes256-ctr,aes128-gcm@openssh.com,aes128-ctr default: aes128-ctr,aes192-ctr,aes256-ctr,aes128-cbc,3des-cbc,aes192-cbc,aes256-cbc,rijndael-cbc@lysator.liu.se cis_rhel8: -3des-cbc,aes128-cbc,aes192-cbc,aes256-cbc,rijndael-cbc@lysator.liu.se cis_rhel9: -3des-cbc,aes128-cbc,aes192-cbc,aes256-cbc,rijndael-cbc@lysator.liu.se diff --git a/linux_os/guide/services/ssh/sshd_strong_macs.var b/linux_os/guide/services/ssh/sshd_strong_macs.var index 0f1ca74b19c..13bfd51d70b 100644 --- a/linux_os/guide/services/ssh/sshd_strong_macs.var +++ b/linux_os/guide/services/ssh/sshd_strong_macs.var @@ -18,3 +18,4 @@ options: cis_sle15: hmac-sha2-512-etm@openssh.com,hmac-sha2-256-etm@openssh.com,umac-128-etm@openssh.com,hmac-sha2-512,hmac-sha2-256 cis_ubuntu2204: hmac-sha2-512-etm@openssh.com,hmac-sha2-256-etm@openssh.com,umac-128-etm@openssh.com,hmac-sha2-512,hmac-sha2-256 cis_ubuntu2404: umac-64-etm@openssh.com,umac-128-etm@openssh.com,hmac-sha2-256-etm@openssh.com,hmac-sha2-512-etm@openssh.com,hmac-sha1-etm@openssh.com,umac-64@openssh.com,umac-128@openssh.com,hmac-sha2-256,hmac-sha2-512,hmac-sha1 + stig_rhel9: hmac-sha2-256-etm@openssh.com,hmac-sha2-512-etm@openssh.com,hmac-sha2-256,hmac-sha2-512 diff --git a/linux_os/guide/system/accounts/accounts-pam/password_quality/password_quality_pwquality/accounts_password_pam_enforce_root/oval/shared.xml b/linux_os/guide/system/accounts/accounts-pam/password_quality/password_quality_pwquality/accounts_password_pam_enforce_root/oval/shared.xml new file mode 100644 index 00000000000..a22dbd1b2a3 --- /dev/null +++ b/linux_os/guide/system/accounts/accounts-pam/password_quality/password_quality_pwquality/accounts_password_pam_enforce_root/oval/shared.xml @@ -0,0 +1,27 @@ +{{% if product == "ol8" or 'rhel' in product %}} +{{% set filepath_regex="^/etc/security/pwquality\.conf(\.d/[^/]+\.conf)?$" %}} +{{% else %}} +{{% set filepath_regex="^/etc/security/pwquality\.conf$" %}} +{{% endif %}} + + + {{{ oval_metadata("The password policy should also be enforced for root.") }}} + + + + + + + + + + + + {{{ filepath_regex }}} + ^enforce_for_root$ + 1 + + + diff --git a/linux_os/guide/system/accounts/accounts-pam/password_quality/password_quality_pwquality/accounts_password_pam_enforce_root/rule.yml b/linux_os/guide/system/accounts/accounts-pam/password_quality/password_quality_pwquality/accounts_password_pam_enforce_root/rule.yml index 1f1ead5e558..0b396cc0610 100644 --- a/linux_os/guide/system/accounts/accounts-pam/password_quality/password_quality_pwquality/accounts_password_pam_enforce_root/rule.yml +++ b/linux_os/guide/system/accounts/accounts-pam/password_quality/password_quality_pwquality/accounts_password_pam_enforce_root/rule.yml @@ -13,7 +13,7 @@ rationale: |- Use of a complex password helps to increase the time and resources required to compromise the password. Password complexity, or strength, is a measure of the effectiveness of a password in resisting attempts at guessing and brute-force attacks. - + Password complexity is one factor of several that determines how long it takes to crack a password. The more complex the password, the greater the number of possible combinations that need to be tested before the password is compromised. @@ -58,5 +58,5 @@ template: vars: text: "enforce_for_root" path: "/etc/security/pwquality.conf" - oval_extend_definitions: - - accounts_password_pam_pwquality + backends: + oval: off diff --git a/linux_os/guide/system/accounts/accounts-pam/password_quality/password_quality_pwquality/accounts_password_pam_enforce_root/tests/commented_out.fail.sh b/linux_os/guide/system/accounts/accounts-pam/password_quality/password_quality_pwquality/accounts_password_pam_enforce_root/tests/commented_out.fail.sh new file mode 100644 index 00000000000..6655826d4af --- /dev/null +++ b/linux_os/guide/system/accounts/accounts-pam/password_quality/password_quality_pwquality/accounts_password_pam_enforce_root/tests/commented_out.fail.sh @@ -0,0 +1,4 @@ +#!/bin/bash +mkdir -p /etc/security/pwquality.conf.d +sed -i '/enforce_for_root/d' /etc/security/pwquality.conf.d/*.conf /etc/security/pwquality.conf +echo '#enforce_for_root' > /etc/security/pwquality.conf diff --git a/linux_os/guide/system/accounts/accounts-pam/password_quality/password_quality_pwquality/accounts_password_pam_enforce_root/tests/correct_config.pass.sh b/linux_os/guide/system/accounts/accounts-pam/password_quality/password_quality_pwquality/accounts_password_pam_enforce_root/tests/correct_config.pass.sh new file mode 100644 index 00000000000..d374bb68b1b --- /dev/null +++ b/linux_os/guide/system/accounts/accounts-pam/password_quality/password_quality_pwquality/accounts_password_pam_enforce_root/tests/correct_config.pass.sh @@ -0,0 +1,3 @@ +#!/bin/bash +touch /etc/security/pwquality.conf.d/example.conf +echo 'enforce_for_root' > /etc/security/pwquality.conf diff --git a/linux_os/guide/system/accounts/accounts-pam/password_quality/password_quality_pwquality/accounts_password_pam_enforce_root/tests/correct_drop_in.pass.sh b/linux_os/guide/system/accounts/accounts-pam/password_quality/password_quality_pwquality/accounts_password_pam_enforce_root/tests/correct_drop_in.pass.sh new file mode 100644 index 00000000000..ebac91880fc --- /dev/null +++ b/linux_os/guide/system/accounts/accounts-pam/password_quality/password_quality_pwquality/accounts_password_pam_enforce_root/tests/correct_drop_in.pass.sh @@ -0,0 +1,2 @@ +#!/bin/bash +echo 'enforce_for_root' > /etc/security/pwquality.conf.d/root.conf diff --git a/linux_os/guide/system/accounts/accounts-pam/password_quality/password_quality_pwquality/accounts_password_pam_enforce_root/tests/not_there.fail.sh b/linux_os/guide/system/accounts/accounts-pam/password_quality/password_quality_pwquality/accounts_password_pam_enforce_root/tests/not_there.fail.sh new file mode 100644 index 00000000000..c828bbe90f4 --- /dev/null +++ b/linux_os/guide/system/accounts/accounts-pam/password_quality/password_quality_pwquality/accounts_password_pam_enforce_root/tests/not_there.fail.sh @@ -0,0 +1,4 @@ +#!/bin/bash +mkdir -p /etc/security/pwquality.conf.d +touch /etc/security/pwquality.conf.d/example.conf +sed -i '/enforce_for_root/d' /etc/security/pwquality.conf.d/*.conf /etc/security/pwquality.conf diff --git a/linux_os/guide/system/accounts/accounts-restrictions/password_storage/var_password_pam_unix_rounds.var b/linux_os/guide/system/accounts/accounts-restrictions/password_storage/var_password_pam_unix_rounds.var index fc6e7601103..1ab6afae188 100644 --- a/linux_os/guide/system/accounts/accounts-restrictions/password_storage/var_password_pam_unix_rounds.var +++ b/linux_os/guide/system/accounts/accounts-restrictions/password_storage/var_password_pam_unix_rounds.var @@ -16,5 +16,6 @@ options: default: 5000 5000: 5000 65536: 65536 + 100000: 100000 11: 11 5: 5 diff --git a/linux_os/guide/system/software/disk_partitioning/partition_for_var_log_audit/policy/stig/shared.yml b/linux_os/guide/system/software/disk_partitioning/partition_for_var_log_audit/policy/stig/shared.yml index 0aa06310a8d..4800ddc7086 100644 --- a/linux_os/guide/system/software/disk_partitioning/partition_for_var_log_audit/policy/stig/shared.yml +++ b/linux_os/guide/system/software/disk_partitioning/partition_for_var_log_audit/policy/stig/shared.yml @@ -11,7 +11,9 @@ checktext: |- $ mount | grep /var/log/audit - UUID=2efb2979-45ac-82d7-0ae632d11f51 on /var/log/home type xfs (rw,realtime,seclabel,attr2,inode64) + /dev/mapper/rootvg-varlogaudit on /var/log/audit type xfs (rw,relatime,seclabel,attr2,inode64,logbufs=8,logbsize=32k,noquota) + + Note: Options displayed for mount may differ. If no line is returned, this is a finding. diff --git a/linux_os/guide/system/software/integrity/crypto/harden_sshd_ciphers_openssh_conf_crypto_policy/rule.yml b/linux_os/guide/system/software/integrity/crypto/harden_sshd_ciphers_openssh_conf_crypto_policy/rule.yml index 5ddb29f3ea5..4f2429fec83 100644 --- a/linux_os/guide/system/software/integrity/crypto/harden_sshd_ciphers_openssh_conf_crypto_policy/rule.yml +++ b/linux_os/guide/system/software/integrity/crypto/harden_sshd_ciphers_openssh_conf_crypto_policy/rule.yml @@ -1,7 +1,7 @@ documentation_complete: true -title: 'Configure SSH Client to Use FIPS 140-2 Validated Ciphers: openssh.config' +title: 'Configure SSH Client to Use FIPS 140 Validated Ciphers: openssh.config' description: |- Crypto Policies provide a centralized control over crypto algorithms usage of many packages. @@ -54,7 +54,7 @@ warnings: Act of 1996, Public Law 104-106. This standard shall be used in designing and implementing cryptographic modules that Federal departments and agencies operate or are operated for them under - contract. See {{{ weblink(link="https://nvlpubs.nist.gov/nistpubs/FIPS/NIST.FIPS.140-2.pdf") }}} + contract. To meet this, the system has to have cryptographic software provided by a vendor that has undergone this certification. This means providing documentation, test results, design information, and independent third diff --git a/products/rhel9/profiles/stig.profile b/products/rhel9/profiles/stig.profile index 940f7bb9cd9..ceef6310f93 100644 --- a/products/rhel9/profiles/stig.profile +++ b/products/rhel9/profiles/stig.profile @@ -1,7 +1,7 @@ documentation_complete: true metadata: - version: V2R2 + version: V2R3 SMEs: - mab879 - ggbecker @@ -12,7 +12,7 @@ title: 'DISA STIG for Red Hat Enterprise Linux 9' description: |- This profile contains configuration checks that align to the - DISA STIG for Red Hat Enterprise Linux 9 V2R2. + DISA STIG for Red Hat Enterprise Linux 9 V2R3. In addition to being applicable to Red Hat Enterprise Linux 9, DISA recognizes this configuration baseline as applicable to the operating system tier of diff --git a/products/rhel9/profiles/stig_gui.profile b/products/rhel9/profiles/stig_gui.profile index 586e1d99bcb..05ba757a517 100644 --- a/products/rhel9/profiles/stig_gui.profile +++ b/products/rhel9/profiles/stig_gui.profile @@ -1,7 +1,7 @@ documentation_complete: true metadata: - version: V2R2 + version: V2R3 SMEs: - mab879 - ggbecker @@ -12,7 +12,7 @@ title: 'DISA STIG with GUI for Red Hat Enterprise Linux 9' description: |- This profile contains configuration checks that align to the - DISA STIG for Red Hat Enterprise Linux 9 V2R2. + DISA STIG for Red Hat Enterprise Linux 9 V2R3. In addition to being applicable to Red Hat Enterprise Linux 9, DISA recognizes this diff --git a/shared/references/cce-redhat-avail.txt b/shared/references/cce-redhat-avail.txt index 188dbc52ee7..31c7ce7b82d 100644 --- a/shared/references/cce-redhat-avail.txt +++ b/shared/references/cce-redhat-avail.txt @@ -18,12 +18,6 @@ CCE-86211-0 CCE-86212-8 CCE-86213-6 CCE-86214-4 -CCE-86216-9 -CCE-86217-7 -CCE-86253-2 -CCE-86254-0 -CCE-86268-0 -CCE-86442-1 CCE-86444-7 CCE-86458-7 CCE-86459-5 diff --git a/shared/references/disa-stig-rhel9-v2r2-xccdf-manual.xml b/shared/references/disa-stig-rhel9-v2r3-xccdf-manual.xml similarity index 68% rename from shared/references/disa-stig-rhel9-v2r2-xccdf-manual.xml rename to shared/references/disa-stig-rhel9-v2r3-xccdf-manual.xml index 02218b2ac54..940a2970108 100644 --- a/shared/references/disa-stig-rhel9-v2r2-xccdf-manual.xml +++ b/shared/references/disa-stig-rhel9-v2r3-xccdf-manual.xml @@ -1,4 +1,4 @@ -acceptedRed Hat Enterprise Linux 9 Security Technical Implementation GuideThis Security Technical Implementation Guide is published as a tool to improve the security of Department of Defense (DOD) information systems. The requirements are derived from the National Institute of Standards and Technology (NIST) 800-53 and related documents. Comments or proposed revisions to this document should be sent via email to the following address: disa.stig_spt@mail.mil.DISASTIG.DOD.MILRelease: 2 Benchmark Date: 24 Oct 20243.51.10.02I - Mission Critical Classified<ProfileDescription></ProfileDescription>I - Mission Critical Public<ProfileDescription></ProfileDescription>I - Mission Critical Sensitive<ProfileDescription></ProfileDescription>II - Mission Support Classified<ProfileDescription></ProfileDescription>II - Mission Support Public<ProfileDescription></ProfileDescription>II - Mission Support Sensitive<ProfileDescription></ProfileDescription>III - Administrative Classified<ProfileDescription></ProfileDescription>III - Administrative Public<ProfileDescription></ProfileDescription>III - Administrative Sensitive<ProfileDescription></ProfileDescription>SRG-OS-000480-GPOS-00227<GroupDescription></GroupDescription>RHEL-09-211010RHEL 9 must be a vendor-supported release.<VulnDiscussion>An operating system release is considered "supported" if the vendor continues to provide security patches for the product. With an unsupported release, it will not be possible to resolve security issues discovered in the system software. +acceptedRed Hat Enterprise Linux 9 Security Technical Implementation GuideThis Security Technical Implementation Guide is published as a tool to improve the security of Department of Defense (DOD) information systems. The requirements are derived from the National Institute of Standards and Technology (NIST) 800-53 and related documents. Comments or proposed revisions to this document should be sent via email to the following address: disa.stig_spt@mail.mil.DISASTIG.DOD.MILRelease: 3 Benchmark Date: 30 Jan 20253.51.10.02I - Mission Critical Classified<ProfileDescription></ProfileDescription>I - Mission Critical Public<ProfileDescription></ProfileDescription>I - Mission Critical Sensitive<ProfileDescription></ProfileDescription>II - Mission Support Classified<ProfileDescription></ProfileDescription>II - Mission Support Public<ProfileDescription></ProfileDescription>II - Mission Support Sensitive<ProfileDescription></ProfileDescription>III - Administrative Classified<ProfileDescription></ProfileDescription>III - Administrative Public<ProfileDescription></ProfileDescription>III - Administrative Sensitive<ProfileDescription></ProfileDescription>SRG-OS-000480-GPOS-00227<GroupDescription></GroupDescription>RHEL-09-211010RHEL 9 must be a vendor-supported release.<VulnDiscussion>An operating system release is considered "supported" if the vendor continues to provide security patches for the product. With an unsupported release, it will not be possible to resolve security issues discovered in the system software. Red Hat offers the Extended Update Support (EUS) add-on to a Red Hat Enterprise Linux subscription, for a fee, for those customers who wish to standardize on a specific minor release for an extended period.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000366Upgrade to a supported version of RHEL 9.Verify that the version or RHEL 9 is vendor supported with the following command: @@ -99,9 +99,9 @@ $ systemctl is-active systemd-journald active -If the systemd-journald service is not active, this is a finding.SRG-OS-000324-GPOS-00125<GroupDescription></GroupDescription>RHEL-09-211045The systemd Ctrl-Alt-Delete burst key sequence in RHEL 9 must be disabled.<VulnDiscussion>A locally logged-on user who presses Ctrl-Alt-Delete when at the console can reboot the system. If accidentally pressed, as could happen in the case of a mixed OS environment, this can create the risk of short-term loss of availability of systems due to unintentional reboot. In a graphical user environment, risk of unintentional reboot from the Ctrl-Alt-Delete sequence is reduced because the user will be prompted before any action is taken. +If the systemd-journald service is not active, this is a finding.SRG-OS-000324-GPOS-00125<GroupDescription></GroupDescription>RHEL-09-211045The systemd Ctrl-Alt-Delete burst key sequence in RHEL 9 must be disabled.<VulnDiscussion>A locally logged-on user who presses Ctrl-Alt-Delete when at the console can reboot the system. If accidentally pressed, as could happen in the case of a mixed OS environment, this can create the risk of short-term loss of availability of systems due to unintentional reboot. In a graphical user environment, risk of unintentional reboot from the Ctrl-Alt-Delete sequence is reduced because the user will be prompted before any action is taken. -Satisfies: SRG-OS-000324-GPOS-00125, SRG-OS-000480-GPOS-00227</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000366CCI-002235Configure the system to disable the CtrlAltDelBurstAction by added or modifying the following line in the "/etc/systemd/system.conf" configuration file: +Satisfies: SRG-OS-000324-GPOS-00125, SRG-OS-000480-GPOS-00227</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-002235Configure the system to disable the CtrlAltDelBurstAction by added or modifying the following line in the "/etc/systemd/system.conf" configuration file: CtrlAltDelBurstAction=none @@ -113,9 +113,9 @@ $ grep -i ctrl /etc/systemd/system.conf CtrlAltDelBurstAction=none -If the "CtrlAltDelBurstAction" is not set to "none", commented out, or is missing, this is a finding.SRG-OS-000324-GPOS-00125<GroupDescription></GroupDescription>RHEL-09-211050The x86 Ctrl-Alt-Delete key sequence must be disabled on RHEL 9.<VulnDiscussion>A locally logged-on user who presses Ctrl-Alt-Delete when at the console can reboot the system. If accidentally pressed, as could happen in the case of a mixed OS environment, this can create the risk of short-term loss of availability of systems due to unintentional reboot. In a graphical user environment, risk of unintentional reboot from the Ctrl-Alt-Delete sequence is reduced because the user will be prompted before any action is taken. +If the "CtrlAltDelBurstAction" is not set to "none", commented out, or is missing, this is a finding.SRG-OS-000324-GPOS-00125<GroupDescription></GroupDescription>RHEL-09-211050The x86 Ctrl-Alt-Delete key sequence must be disabled on RHEL 9.<VulnDiscussion>A locally logged-on user who presses Ctrl-Alt-Delete when at the console can reboot the system. If accidentally pressed, as could happen in the case of a mixed OS environment, this can create the risk of short-term loss of availability of systems due to unintentional reboot. In a graphical user environment, risk of unintentional reboot from the Ctrl-Alt-Delete sequence is reduced because the user will be prompted before any action is taken. -Satisfies: SRG-OS-000324-GPOS-00125, SRG-OS-000480-GPOS-00227</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000366CCI-002235Configure RHEL 9 to disable the ctrl-alt-del.target with the following command: +Satisfies: SRG-OS-000324-GPOS-00125, SRG-OS-000480-GPOS-00227</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-002235Configure RHEL 9 to disable the ctrl-alt-del.target with the following command: $ sudo systemctl disable --now ctrl-alt-del.target $ sudo systemctl mask --now ctrl-alt-del.targetVerify RHEL 9 is not configured to reboot the system when Ctrl-Alt-Delete is pressed with the following command: @@ -126,9 +126,9 @@ ctrl-alt-del.target Loaded: masked (Reason: Unit ctrl-alt-del.target is masked.) Active: inactive (dead) -If the "ctrl-alt-del.target" is loaded and not masked, this is a finding.SRG-OS-000324-GPOS-00125<GroupDescription></GroupDescription>RHEL-09-211055RHEL 9 debug-shell systemd service must be disabled.<VulnDiscussion>The debug-shell requires no authentication and provides root privileges to anyone who has physical access to the machine. While this feature is disabled by default, masking it adds an additional layer of assurance that it will not be enabled via a dependency in systemd. This also prevents attackers with physical access from trivially bypassing security on the machine through valid troubleshooting configurations and gaining root access when the system is rebooted. +If the "ctrl-alt-del.target" is loaded and not masked, this is a finding.SRG-OS-000324-GPOS-00125<GroupDescription></GroupDescription>RHEL-09-211055RHEL 9 debug-shell systemd service must be disabled.<VulnDiscussion>The debug-shell requires no authentication and provides root privileges to anyone who has physical access to the machine. While this feature is disabled by default, masking it adds an additional layer of assurance that it will not be enabled via a dependency in systemd. This also prevents attackers with physical access from trivially bypassing security on the machine through valid troubleshooting configurations and gaining root access when the system is rebooted. -Satisfies: SRG-OS-000324-GPOS-00125, SRG-OS-000480-GPOS-00227</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000366CCI-002235Configure RHEL 9 to mask the debug-shell systemd service with the following command: +Satisfies: SRG-OS-000324-GPOS-00125, SRG-OS-000480-GPOS-00227</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-002235Configure RHEL 9 to mask the debug-shell systemd service with the following command: $ sudo systemctl disable --now debug-shell.service $ sudo systemctl mask --now debug-shell.serviceVerify RHEL 9 is configured to mask the debug-shell systemd service with the following command: @@ -139,7 +139,7 @@ debug-shell.service Loaded: masked (Reason: Unit debug-shell.service is masked.) Active: inactive (dead) -If the "debug-shell.service" is loaded and not masked, this is a finding.SRG-OS-000080-GPOS-00048<GroupDescription></GroupDescription>RHEL-09-212010RHEL 9 must require a boot loader superuser password.<VulnDiscussion>To mitigate the risk of unauthorized access to sensitive information by entities that have been issued certificates by DOD-approved PKIs, all DOD systems (e.g., web servers and web portals) must be properly configured to incorporate access control methods that do not rely solely on the possession of a certificate for access. Successful authentication must not automatically give an entity access to an asset or security boundary. Authorization procedures and controls must be implemented to ensure each authenticated entity also has a validated and current authorization. Authorization is the process of determining whether an entity, once authenticated, is permitted to access a specific asset. Information systems use access control policies and enforcement mechanisms to implement this requirement. +If the "debug-shell.service" is loaded and not masked, this is a finding.SRG-OS-000080-GPOS-00048<GroupDescription></GroupDescription>RHEL-09-212010RHEL 9 must require a boot loader superuser password.<VulnDiscussion>To mitigate the risk of unauthorized access to sensitive information by entities that have been issued certificates by DOD-approved PKIs, all DOD systems (e.g., web servers and web portals) must be properly configured to incorporate access control methods that do not rely solely on the possession of a certificate for access. Successful authentication must not automatically give an entity access to an asset or security boundary. Authorization procedures and controls must be implemented to ensure each authenticated entity also has a validated and current authorization. Authorization is the process of determining whether an entity, once authenticated, is permitted to access a specific asset. Information systems use access control policies and enforcement mechanisms to implement this requirement. Password protection on the boot loader configuration ensures users with physical access cannot trivially alter important bootloader settings. These include which kernel to use, and whether to enter single-user mode.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000213Configure RHEL 9 to require a grub bootloader password for the grub superuser account. @@ -147,13 +147,13 @@ Generate an encrypted grub2 password for the grub superuser account with the fol $ sudo grub2-setpassword Enter password: -Confirm password:Verify the boot loader superuser password has been set and run the following command: +Confirm password:Verify the boot loader superuser password has been set with the following command: -$ sudo grep "superusers" /etc/grub2.cfg +$ sudo grep password_pbkdf2 /etc/grub2.cfg -password_pbkdf2 superusers-account ${GRUB2_PASSWORD} +password_pbkdf2 <superusers-accountname> ${GRUB2_PASSWORD} -To verify the boot loader superuser account password has been set, and the password encrypted, run the following command: +To verify the boot loader superuser account password has been set and the password encrypted, run the following command: $ sudo cat /boot/grub2/user.cfg @@ -162,31 +162,32 @@ GRUB2_PASSWORD=grub.pbkdf2.sha512.10000.C4E08AC72FBFF7E837FD267BFAD7AEB3D42DDC 916F7AB46E0D.1302284FCCC52CD73BA3671C6C12C26FF50BA873293B24EE2A96EE3B57963E6D7 0C83964B473EC8F93B07FE749AA6710269E904A9B08A6BBACB00A2D242AD828 -If a "GRUB2_PASSWORD" is not set, this is a finding.SRG-OS-000480-GPOS-00227<GroupDescription></GroupDescription>RHEL-09-212015RHEL 9 must disable the ability of systemd to spawn an interactive boot process.<VulnDiscussion>Using interactive or recovery boot, the console user could disable auditing, firewalls, or other services, weakening system security.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000366Configure RHEL 9 to allocate sufficient audit_backlog_limit to disable the ability of systemd to spawn an interactive boot process with the following command: +If a "GRUB2_PASSWORD" is not set, this is a finding.SRG-OS-000480-GPOS-00227<GroupDescription></GroupDescription>RHEL-09-212015RHEL 9 must disable the ability of systemd to spawn an interactive boot process.<VulnDiscussion>Using interactive or recovery boot, the console user could disable auditing, firewalls, or other services, weakening system security.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000366Configure the current GRUB 2 configuration to disable the ability of systemd to spawn an interactive boot process with the following command: -$ sudo grubby --update-kernel=ALL --remove-args="systemd.confirm_spawn"Verify that GRUB 2 is configured to disable interactive boot. +$ sudo grubby --update-kernel=ALL --remove-args="systemd.confirm_spawn"Verify that GRUB 2 is configured to disable interactive boot. Check that the current GRUB 2 configuration disables the ability of systemd to spawn an interactive boot process with the following command: $ sudo grubby --info=ALL | grep args | grep 'systemd.confirm_spawn' -If any output is returned, this is a finding.SRG-OS-000080-GPOS-00048<GroupDescription></GroupDescription>RHEL-09-212020RHEL 9 must require a unique superusers name upon booting into single-user and maintenance modes.<VulnDiscussion>Having a nondefault grub superuser username makes password-guessing attacks less effective.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000213Configure RHEL 9 to have a unique username for the grub superuser account. +If any output is returned, this is a finding.SRG-OS-000080-GPOS-00048<GroupDescription></GroupDescription>RHEL-09-212020RHEL 9 must require a unique superusers name upon booting into single-user and maintenance modes.<VulnDiscussion>Having a nondefault grub superuser username makes password-guessing attacks less effective.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000213Configure RHEL 9 to have a unique username for the grub superuser account. -Edit the "/etc/grub.d/01_users" file and add or modify the following lines with a nondefault username for the superusers account: +Edit the "/etc/grub.d/01_users" file and add or modify the following lines with a nondefault username for the superuser account: -set superusers="<superusers-account>" -export superusers +set superusers="<accountname>" +export superusers Once the superuser account has been added, update the grub.cfg file by running: -$ sudo grubby --update-kernel=ALLVerify the boot loader superuser account has been set with the following command: +$ sudo grubby --update-kernel=ALLVerify the boot loader superuser account has been set with the following command: $ sudo grep -A1 "superusers" /etc/grub2.cfg -set superusers="<superusers-account>" +set superusers="<accountname>" export superusers +password_pbkdf2 <accountname> ${GRUB2_PASSWORD} -The <superusers-account> is the actual account name different from common names like root, admin, or administrator. +Verify <accountname> is not a common name such as root, admin, or administrator. If superusers contains easily guessable usernames, this is a finding.SRG-OS-000480-GPOS-00227<GroupDescription></GroupDescription>RHEL-09-212025RHEL 9 /boot/grub2/grub.cfg file must be group-owned by root.<VulnDiscussion>The "root" group is a highly privileged group. Furthermore, the group-owner of this file should not have any access privileges anyway.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000366Change the group of the file /boot/grub2/grub.cfg to root by running the following command: @@ -204,11 +205,11 @@ $ sudo stat -c "%U %n" /boot/grub2/grub.cfg root /boot/grub2/grub.cfg -If "/boot/grub2/grub.cfg" file does not have an owner of "root", this is a finding.SRG-OS-000480-GPOS-00227<GroupDescription></GroupDescription>RHEL-09-212035RHEL 9 must disable virtual system calls.<VulnDiscussion>System calls are special routines in the Linux kernel, which userspace applications ask to do privileged tasks. Invoking a system call is an expensive operation because the processor must interrupt the currently executing task and switch context to kernel mode and then back to userspace after the system call completes. Virtual system calls map into user space a page that contains some variables and the implementation of some system calls. This allows the system calls to be executed in userspace to alleviate the context switching expense. +If "/boot/grub2/grub.cfg" file does not have an owner of "root", this is a finding.SRG-OS-000480-GPOS-00227<GroupDescription></GroupDescription>RHEL-09-212035RHEL 9 must disable virtual system calls.<VulnDiscussion>System calls are special routines in the Linux kernel, which userspace applications ask to do privileged tasks. Invoking a system call is an expensive operation because the processor must interrupt the currently executing task and switch context to kernel mode and then back to userspace after the system call completes. Virtual system calls map into user space a page that contains some variables and the implementation of some system calls. This allows the system calls to be executed in userspace to alleviate the context switching expense. Virtual system calls provide an opportunity of attack for a user who has control of the return instruction pointer. Disabling virtual system calls help to prevent return oriented programming (ROP) attacks via buffer overflows and overruns. If the system intends to run containers based on RHEL 6 components, then virtual system calls will need enabled so the components function properly. -Satisfies: SRG-OS-000480-GPOS-00227, SRG-OS-000134-GPOS-00068</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000366CCI-001084Document the use of virtual system calls with the ISSO as an operational requirement or disable them with the following command: +Satisfies: SRG-OS-000480-GPOS-00227, SRG-OS-000134-GPOS-00068</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-001084Document the use of virtual system calls with the ISSO as an operational requirement or disable them with the following command: $ sudo grubby --update-kernel=ALL --args="vsyscall=none" @@ -226,9 +227,9 @@ $ sudo grep vsyscall /etc/default/grub GRUB_CMDLINE_LINUX="vsyscall=none" -If "vsyscall" is not set to "none", is missing or commented out, and is not documented with the information system security officer (ISSO) as an operational requirement, this is a finding.SRG-OS-000480-GPOS-00227<GroupDescription></GroupDescription>RHEL-09-212040RHEL 9 must clear the page allocator to prevent use-after-free attacks.<VulnDiscussion>Poisoning writes an arbitrary value to freed pages, so any modification or reference to that page after being freed or before being initialized will be detected and prevented. This prevents many types of use-after-free vulnerabilities at little performance cost. Also prevents leak of data and detection of corrupted memory. +If "vsyscall" is not set to "none", is missing or commented out, and is not documented with the information system security officer (ISSO) as an operational requirement, this is a finding.SRG-OS-000480-GPOS-00227<GroupDescription></GroupDescription>RHEL-09-212040RHEL 9 must clear the page allocator to prevent use-after-free attacks.<VulnDiscussion>Poisoning writes an arbitrary value to freed pages, so any modification or reference to that page after being freed or before being initialized will be detected and prevented. This prevents many types of use-after-free vulnerabilities at little performance cost. Also prevents leak of data and detection of corrupted memory. -Satisfies: SRG-OS-000480-GPOS-00227, SRG-OS-000134-GPOS-00068</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000366CCI-001084Configure RHEL 9 to enable page poisoning with the following commands: +Satisfies: SRG-OS-000480-GPOS-00227, SRG-OS-000134-GPOS-00068</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-001084Configure RHEL 9 to enable page poisoning with the following commands: $ sudo grubby --update-kernel=ALL --args="page_poison=1" @@ -274,7 +275,7 @@ $ sudo grep slub_debug /etc/default/grub GRUB_CMDLINE_LINUX="slub_debug=P" -If "slub_debug" does not contain "P", is missing, or is commented out, this is a finding.SRG-OS-000433-GPOS-00193<GroupDescription></GroupDescription>RHEL-09-212050RHEL 9 must enable mitigations against processor-based vulnerabilities.<VulnDiscussion>Kernel page-table isolation is a kernel feature that mitigates the Meltdown security vulnerability and hardens the kernel against attempts to bypass kernel address space layout randomization (KASLR). +If "slub_debug" does not contain "P", is missing, or is commented out, this is a finding.SRG-OS-000433-GPOS-00193<GroupDescription></GroupDescription>RHEL-09-212050RHEL 9 must enable mitigations against processor-based vulnerabilities.<VulnDiscussion>Kernel page-table isolation is a kernel feature that mitigates the Meltdown security vulnerability and hardens the kernel against attempts to bypass kernel address space layout randomization (KASLR). Satisfies: SRG-OS-000433-GPOS-00193, SRG-OS-000095-GPOS-00049</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000381CCI-002824Configure RHEL 9 to enable kernel page-table isolation with the following command: @@ -282,21 +283,19 @@ $ sudo grubby --update-kernel=ALL --args="pti=on" Add or modify the following line in "/etc/default/grub" to ensure the configuration survives kernel updates: -GRUB_CMDLINE_LINUX="pti=on"Verify RHEL 9 enables kernel page-table isolation with the following command: - -$ sudo grubby --info=ALL | grep pti +GRUB_CMDLINE_LINUX="pti=on"Verify RHEL 9 enables kernel page-table isolation with the following command: -args="ro crashkernel=auto resume=/dev/mapper/rhel-swap rd.lvm.lv=rhel/root rd.lvm.lv=rhel/swap rhgb quiet fips=1 audit=1 audit_backlog_limit=8192 pti=on +$ sudo grubby --info=ALL | grep args | grep -v 'pti=on' -If the "pti" entry does not equal "on", or is missing, this is a finding. +If any output is returned, this is a finding. Check that kernel page-table isolation is enabled by default to persist in kernel updates: -$ sudo grep pti /etc/default/grub +$ grep pti /etc/default/grub GRUB_CMDLINE_LINUX="pti=on" -If "pti" is not set to "on", is missing or commented out, this is a finding.SRG-OS-000037-GPOS-00015<GroupDescription></GroupDescription>RHEL-09-212055RHEL 9 must enable auditing of processes that start prior to the audit daemon.<VulnDiscussion>Without the capability to generate audit records, it would be difficult to establish, correlate, and investigate the events relating to an incident or identify those responsible for one. +If "pti" is not set to "on", is missing or commented out, this is a finding.SRG-OS-000037-GPOS-00015<GroupDescription></GroupDescription>RHEL-09-212055RHEL 9 must enable auditing of processes that start prior to the audit daemon.<VulnDiscussion>Without the capability to generate audit records, it would be difficult to establish, correlate, and investigate the events relating to an incident or identify those responsible for one. If auditing is enabled late in the startup process, the actions of some startup processes may not be audited. Some audit systems also maintain state information only available if auditing is enabled before a given process is created. @@ -306,19 +305,17 @@ $ sudo grubby --update-kernel=ALL --args="audit=1" Add or modify the following line in "/etc/default/grub" to ensure the configuration survives kernel updates: -GRUB_CMDLINE_LINUX="audit=1"Verify that GRUB 2 is configured to enable auditing of processes that start prior to the audit daemon with the following commands: - -Check that the current GRUB 2 configuration enabled auditing: +GRUB_CMDLINE_LINUX="audit=1"Verify that GRUB 2 is configured to enable auditing of processes that start prior to the audit daemon with the following commands: -$ sudo grubby --info=ALL | grep audit +Check that the current GRUB 2 configuration enables auditing: -args="ro crashkernel=auto resume=/dev/mapper/rhel-swap rd.lvm.lv=rhel/root rd.lvm.lv=rhel/swap rhgb quiet fips=1 audit=1 audit_backlog_limit=8192 pti=on +$ sudo grubby --info=ALL | grep args | grep -v 'audit=1' -If "audit" is not set to "1" or is missing, this is a finding. +If any output is returned, this is a finding. Check that auditing is enabled by default to persist in kernel updates: -$ sudo grep audit /etc/default/grub +$ grep audit /etc/default/grub GRUB_CMDLINE_LINUX="audit=1" @@ -354,7 +351,7 @@ $ sudo /usr/lib/systemd/systemd-sysctl --cat-config | egrep -v '^(#|;)' | grep - kernel.dmesg_restrict = 1 -If "kernel.dmesg_restrict" is not set to "1" or is missing, this is a finding.SRG-OS-000132-GPOS-00067<GroupDescription></GroupDescription>RHEL-09-213015RHEL 9 must prevent kernel profiling by nonprivileged users.<VulnDiscussion>Preventing unauthorized information transfers mitigates the risk of information, including encrypted representations of information, produced by the actions of prior users/roles (or the actions of processes acting on behalf of prior users/roles) from being available to any current users/roles (or current processes) that obtain access to shared system resources (e.g., registers, main memory, hard disks) after those resources have been released back to information systems. The control of information in shared resources is also commonly referred to as object reuse and residual information protection. +If "kernel.dmesg_restrict" is not set to "1" or is missing, this is a finding.SRG-OS-000132-GPOS-00067<GroupDescription></GroupDescription>RHEL-09-213015RHEL 9 must prevent kernel profiling by nonprivileged users.<VulnDiscussion>Preventing unauthorized information transfers mitigates the risk of information, including encrypted representations of information, produced by the actions of prior users/roles (or the actions of processes acting on behalf of prior users/roles) from being available to any current users/roles (or current processes) that obtain access to shared system resources (e.g., registers, main memory, hard disks) after those resources have been released back to information systems. The control of information in shared resources is also commonly referred to as object reuse and residual information protection. This requirement generally applies to the design of an information technology product, but it can also apply to the configuration of particular information system components that are, or use, such products. This can be verified by acceptance/validation processes in DOD or other government agencies. @@ -370,26 +367,27 @@ kernel.perf_event_paranoid = 2 Load settings from all system configuration files with the following command: -$ sudo sysctl --systemVerify RHEL 9 is configured to prevent kernel profiling by nonprivileged users with the following commands: +$ sudo sysctl --systemVerify RHEL 9 is configured to prevent kernel profiling by nonprivileged users with the following commands: Check the status of the kernel.perf_event_paranoid kernel parameter. -$ sudo sysctl kernel.perf_event_paranoid +$ sysctl kernel.perf_event_paranoid kernel.perf_event_paranoid = 2 If "kernel.perf_event_paranoid" is not set to "2" or is missing, this is a finding. + Check that the configuration files are present to enable this kernel parameter. $ sudo /usr/lib/systemd/systemd-sysctl --cat-config | egrep -v '^(#|;)' | grep -F kernel.perf_event_paranoid | tail -1 kernel.perf_event_paranoid = 2 -If "kernel.perf_event_paranoid" is not set to "2" or is missing, this is a finding.SRG-OS-000480-GPOS-00227<GroupDescription></GroupDescription>RHEL-09-213020RHEL 9 must prevent the loading of a new kernel for later execution.<VulnDiscussion>Changes to any software components can have significant effects on the overall security of the operating system. This requirement ensures the software has not been tampered with and that it has been provided by a trusted vendor. +If "kernel.perf_event_paranoid" is not set to "2" or is missing, this is a finding.SRG-OS-000480-GPOS-00227<GroupDescription></GroupDescription>RHEL-09-213020RHEL 9 must prevent the loading of a new kernel for later execution.<VulnDiscussion>Changes to any software components can have significant effects on the overall security of the operating system. This requirement ensures the software has not been tampered with and that it has been provided by a trusted vendor. Disabling kexec_load prevents an unsigned kernel image (that could be a windows kernel or modified vulnerable kernel) from being loaded. Kexec can be used subvert the entire secureboot process and should be avoided at all costs especially since it can load unsigned kernel images. -Satisfies: SRG-OS-000480-GPOS-00227, SRG-OS-000366-GPOS-00153</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000366CCI-003992CCI-001749Add or edit the following line in a system configuration file in the "/etc/sysctl.d/" directory: +Satisfies: SRG-OS-000480-GPOS-00227, SRG-OS-000366-GPOS-00153</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-003992CCI-001749Add or edit the following line in a system configuration file in the "/etc/sysctl.d/" directory: kernel.kexec_load_disabled = 1 @@ -411,9 +409,9 @@ $ sudo /usr/lib/systemd/systemd-sysctl --cat-config | egrep -v '^(#|;)' | grep - kernel.kexec_load_disabled = 1 -If "kernel.kexec_load_disabled" is not set to "1" or is missing, this is a finding.SRG-OS-000132-GPOS-00067<GroupDescription></GroupDescription>RHEL-09-213025RHEL 9 must restrict exposed kernel pointer addresses access.<VulnDiscussion>Exposing kernel pointers (through procfs or "seq_printf()") exposes kernel writeable structures, which may contain functions pointers. If a write vulnerability occurs in the kernel, allowing write access to any of this structure, the kernel can be compromised. This option disallows any program without the CAP_SYSLOG capability to get the addresses of kernel pointers by replacing them with "0". +If "kernel.kexec_load_disabled" is not set to "1" or is missing, this is a finding.SRG-OS-000132-GPOS-00067<GroupDescription></GroupDescription>RHEL-09-213025RHEL 9 must restrict exposed kernel pointer addresses access.<VulnDiscussion>Exposing kernel pointers (through procfs or "seq_printf()") exposes kernel writeable structures, which may contain functions pointers. If a write vulnerability occurs in the kernel, allowing write access to any of this structure, the kernel can be compromised. This option disallows any program without the CAP_SYSLOG capability to get the addresses of kernel pointers by replacing them with "0". -Satisfies: SRG-OS-000132-GPOS-00067, SRG-OS-000433-GPOS-00192, SRG-OS-000480-GPOS-00227</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000366CCI-001082CCI-002824Add or edit the following line in a system configuration file in the "/etc/sysctl.d/" directory: +Satisfies: SRG-OS-000132-GPOS-00067, SRG-OS-000433-GPOS-00192, SRG-OS-000480-GPOS-00227</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-001082CCI-002824Add or edit the following line in a system configuration file in the "/etc/sysctl.d/" directory: kernel.kptr_restrict = 1 @@ -505,62 +503,67 @@ $ sudo /usr/lib/systemd/systemd-sysctl --cat-config | egrep -v '^(#|;)' | grep - kernel.core_pattern = |/bin/false -If "kernel.core_pattern" is not set to "|/bin/false" and is not documented with the ISSO as an operational requirement, or is missing, this is a finding.SRG-OS-000095-GPOS-00049<GroupDescription></GroupDescription>RHEL-09-213045RHEL 9 must be configured to disable the Asynchronous Transfer Mode kernel module.<VulnDiscussion>Disabling Asynchronous Transfer Mode (ATM) protects the system against exploitation of any flaws in its implementation.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000381To configure the system to prevent the atm kernel module from being loaded, add the following line to the file /etc/modprobe.d/atm.conf (or create atm.conf if it does not exist): +If "kernel.core_pattern" is not set to "|/bin/false" and is not documented with the ISSO as an operational requirement, or is missing, this is a finding.SRG-OS-000095-GPOS-00049<GroupDescription></GroupDescription>RHEL-09-213045RHEL 9 must be configured to disable the Asynchronous Transfer Mode kernel module.<VulnDiscussion>Disabling Asynchronous Transfer Mode (ATM) protects the system against exploitation of any flaws in its implementation.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000381To configure the system to prevent the atm kernel module from being loaded, add the following line to the file /etc/modprobe.d/atm.conf (or create atm.conf if it does not exist): install atm /bin/false -blacklist atmVerify that RHEL 9 disables the ability to load the ATM kernel module with the following command: +blacklist atmVerify that RHEL 9 disables the ability to load the ATM kernel module with the following command: -$ sudo grep -r atm /etc/modprobe.conf /etc/modprobe.d/* +$ grep -r atm /etc/modprobe.conf /etc/modprobe.d/* -blacklist atm +install atm /bin/false +blacklist atm -If the command does not return any output, or the line is commented out, and use of ATM is not documented with the information system security officer (ISSO) as an operational requirement, this is a finding.SRG-OS-000095-GPOS-00049<GroupDescription></GroupDescription>RHEL-09-213050RHEL 9 must be configured to disable the Controller Area Network kernel module.<VulnDiscussion>Disabling Controller Area Network (CAN) protects the system against exploitation of any flaws in its implementation.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000381To configure the system to prevent the can kernel module from being loaded, add the following line to the file /etc/modprobe.d/can.conf (or create atm.conf if it does not exist): +If the command does not return any output, or the line is commented out, and use of ATM is not documented with the information system security officer (ISSO) as an operational requirement, this is a finding.SRG-OS-000095-GPOS-00049<GroupDescription></GroupDescription>RHEL-09-213050RHEL 9 must be configured to disable the Controller Area Network kernel module.<VulnDiscussion>Disabling Controller Area Network (CAN) protects the system against exploitation of any flaws in its implementation.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000381To configure the system to prevent the can kernel module from being loaded, add the following lines to the file /etc/modprobe.d/can.conf (or create can.conf if it does not exist): install can /bin/false -blacklist canVerify that RHEL 9 disables the ability to load the CAN kernel module with the following command: +blacklist canVerify that RHEL 9 disables the ability to load the CAN kernel module with the following command: -$ sudo grep -r can /etc/modprobe.conf /etc/modprobe.d/* +$ grep -r can /etc/modprobe.conf /etc/modprobe.d/* +install can /bin/false blacklist can -If the command does not return any output, or the line is commented out, and use of CAN is not documented with the information system security officer (ISSO) as an operational requirement, this is a finding.SRG-OS-000095-GPOS-00049<GroupDescription></GroupDescription>RHEL-09-213055RHEL 9 must be configured to disable the FireWire kernel module.<VulnDiscussion>Disabling firewire protects the system against exploitation of any flaws in its implementation.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000381To configure the system to prevent the firewire-core kernel module from being loaded, add the following line to the file /etc/modprobe.d/firewire-core.conf (or create firewire-core.conf if it does not exist): +If the command does not return any output, or the lines are commented out, and use of CAN is not documented with the information system security officer (ISSO) as an operational requirement, this is a finding.SRG-OS-000095-GPOS-00049<GroupDescription></GroupDescription>RHEL-09-213055RHEL 9 must be configured to disable the FireWire kernel module.<VulnDiscussion>Disabling firewire protects the system against exploitation of any flaws in its implementation.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000381To configure the system to prevent the firewire-core kernel module from being loaded, add the following lines to the file /etc/modprobe.d/firewire-core.conf (or create firewire-core.conf if it does not exist): install firewire-core /bin/false -blacklist firewire-coreVerify that RHEL 9 disables the ability to load the firewire-core kernel module with the following command: +blacklist firewire-coreVerify that RHEL 9 disables the ability to load the firewire-core kernel module with the following command: -$ sudo grep -r firewire-core /etc/modprobe.conf /etc/modprobe.d/* +$ grep -r firewire-core /etc/modprobe.conf /etc/modprobe.d/* +install firewire-core /bin/false blacklist firewire-core -If the command does not return any output, or the line is commented out, and use of firewire-core is not documented with the information system security officer (ISSO) as an operational requirement, this is a finding.SRG-OS-000095-GPOS-00049<GroupDescription></GroupDescription>RHEL-09-213060RHEL 9 must disable the Stream Control Transmission Protocol (SCTP) kernel module.<VulnDiscussion>It is detrimental for operating systems to provide, or install by default, functionality exceeding requirements or mission objectives. These unnecessary capabilities or services are often overlooked and therefore may remain unsecured. They increase the risk to the platform by providing additional attack vectors. +If the command does not return any output, or the lines are commented out, and use of firewire-core is not documented with the information system security officer (ISSO) as an operational requirement, this is a finding.SRG-OS-000095-GPOS-00049<GroupDescription></GroupDescription>RHEL-09-213060RHEL 9 must disable the Stream Control Transmission Protocol (SCTP) kernel module.<VulnDiscussion>It is detrimental for operating systems to provide, or install by default, functionality exceeding requirements or mission objectives. These unnecessary capabilities or services are often overlooked and therefore may remain unsecured. They increase the risk to the platform by providing additional attack vectors. Failing to disconnect unused protocols can result in a system compromise. -The Stream Control Transmission Protocol (SCTP) is a transport layer protocol, designed to support the idea of message-oriented communication, with several streams of messages within one connection. Disabling SCTP protects the system against exploitation of any flaws in its implementation.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000381To configure the system to prevent the sctp kernel module from being loaded, add the following line to the file /etc/modprobe.d/sctp.conf (or create sctp.conf if it does not exist): +The Stream Control Transmission Protocol (SCTP) is a transport layer protocol, designed to support the idea of message-oriented communication, with several streams of messages within one connection. Disabling SCTP protects the system against exploitation of any flaws in its implementation.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000381To configure the system to prevent the sctp kernel module from being loaded, add the following lines to the file /etc/modprobe.d/sctp.conf (or create sctp.conf if it does not exist): install sctp /bin/false -blacklist sctpVerify that RHEL 9 disables the ability to load the sctp kernel module with the following command: +blacklist sctpVerify that RHEL 9 disables the ability to load the sctp kernel module with the following command: -$ sudo grep -r sctp /etc/modprobe.conf /etc/modprobe.d/* +$ grep -r sctp /etc/modprobe.conf /etc/modprobe.d/* +install sctp /bin/false blacklist sctp -If the command does not return any output, or the line is commented out, and use of sctp is not documented with the information system security officer (ISSO) as an operational requirement, this is a finding.SRG-OS-000095-GPOS-00049<GroupDescription></GroupDescription>RHEL-09-213065RHEL 9 must disable the Transparent Inter Process Communication (TIPC) kernel module.<VulnDiscussion>It is detrimental for operating systems to provide, or install by default, functionality exceeding requirements or mission objectives. These unnecessary capabilities or services are often overlooked and therefore may remain unsecured. They increase the risk to the platform by providing additional attack vectors. +If the command does not return any output, or the lines are commented out, and use of sctp is not documented with the information system security officer (ISSO) as an operational requirement, this is a finding.SRG-OS-000095-GPOS-00049<GroupDescription></GroupDescription>RHEL-09-213065RHEL 9 must disable the Transparent Inter Process Communication (TIPC) kernel module.<VulnDiscussion>It is detrimental for operating systems to provide, or install by default, functionality exceeding requirements or mission objectives. These unnecessary capabilities or services are often overlooked and therefore may remain unsecured. They increase the risk to the platform by providing additional attack vectors. Failing to disconnect unused protocols can result in a system compromise. -The Transparent Inter Process Communication (TIPC) is a protocol that is specially designed for intra-cluster communication. It can be configured to transmit messages either on UDP or directly across Ethernet. Message delivery is sequence guaranteed, loss free and flow controlled. Disabling TIPC protects the system against exploitation of any flaws in its implementation.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000381To configure the system to prevent the tipc kernel module from being loaded, add the following line to the file /etc/modprobe.d/tipc.conf (or create tipc.conf if it does not exist): +The Transparent Inter Process Communication (TIPC) is a protocol that is specially designed for intra-cluster communication. It can be configured to transmit messages either on UDP or directly across Ethernet. Message delivery is sequence guaranteed, loss free and flow controlled. Disabling TIPC protects the system against exploitation of any flaws in its implementation.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000381To configure the system to prevent the tipc kernel module from being loaded, add the following lines to the file /etc/modprobe.d/tipc.conf (or create tipc.conf if it does not exist): install tipc /bin/false -blacklist tipcVerify that RHEL 9 disables the ability to load the tipc kernel module with the following command: +blacklist tipcVerify that RHEL 9 disables the ability to load the tipc kernel module with the following command: -$ sudo grep -r tipc /etc/modprobe.conf /etc/modprobe.d/* +$ grep -r tipc /etc/modprobe.conf /etc/modprobe.d/* +install tipc /bin/false blacklist tipc -If the command does not return any output, or the line is commented out, and use of tipc is not documented with the information system security officer (ISSO) as an operational requirement, this is a finding.SRG-OS-000433-GPOS-00193<GroupDescription></GroupDescription>RHEL-09-213070RHEL 9 must implement address space layout randomization (ASLR) to protect its memory from unauthorized code execution.<VulnDiscussion>Address space layout randomization (ASLR) makes it more difficult for an attacker to predict the location of attack code they have introduced into a process' address space during an attempt at exploitation. Additionally, ASLR makes it more difficult for an attacker to know the location of existing code in order to repurpose it using return oriented programming (ROP) techniques. +If the command does not return any output, or the lines are commented out, and use of tipc is not documented with the information system security officer (ISSO) as an operational requirement, this is a finding.SRG-OS-000433-GPOS-00193<GroupDescription></GroupDescription>RHEL-09-213070RHEL 9 must implement address space layout randomization (ASLR) to protect its memory from unauthorized code execution.<VulnDiscussion>Address space layout randomization (ASLR) makes it more difficult for an attacker to predict the location of attack code they have introduced into a process' address space during an attempt at exploitation. Additionally, ASLR makes it more difficult for an attacker to know the location of existing code in order to repurpose it using return oriented programming (ROP) techniques. -Satisfies: SRG-OS-000433-GPOS-00193, SRG-OS-000480-GPOS-00227</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000366CCI-002824Add or edit the following line in a system configuration file in the "/etc/sysctl.d/" directory: +Satisfies: SRG-OS-000433-GPOS-00193, SRG-OS-000480-GPOS-00227</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-002824Add or edit the following line in a system configuration file in the "/etc/sysctl.d/" directory: kernel.randomize_va_space = 2 @@ -579,38 +582,47 @@ $ sudo /usr/lib/systemd/systemd-sysctl --cat-config | egrep -v '^(#|;)' | grep kernel.randomize_va_space = 2 -If "kernel.randomize_va_space" is not set to "2" or is missing, this is a finding.SRG-OS-000132-GPOS-00067<GroupDescription></GroupDescription>RHEL-09-213075RHEL 9 must disable access to network bpf system call from nonprivileged processes.<VulnDiscussion>Loading and accessing the packet filters programs and maps using the bpf() system call has the potential of revealing sensitive information about the kernel state. +If "kernel.randomize_va_space" is not set to "2" or is missing, this is a finding.SRG-OS-000132-GPOS-00067<GroupDescription></GroupDescription>RHEL-09-213075RHEL 9 must disable access to network bpf system call from nonprivileged processes.<VulnDiscussion>Loading and accessing the packet filters programs and maps using the bpf() system call has the potential of revealing sensitive information about the kernel state. + +Satisfies: SRG-OS-000132-GPOS-00067, SRG-OS-000480-GPOS-00227</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-001082Configure the currently loaded kernel parameter to the secure setting: -Satisfies: SRG-OS-000132-GPOS-00067, SRG-OS-000480-GPOS-00227</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000366CCI-001082Configure RHEL 9 to prevent privilege escalation thru the kernel by disabling access to the bpf syscall by adding the following line to a file, in the "/etc/sysctl.d" directory: +$ sudo sysctl -w kernel.unprivileged_bpf_disabled=1 + +Configure RHEL 9 to prevent privilege escalation through the kernel by disabling access to the bpf syscall by adding the following line to a file in the "/etc/sysctl.d" directory: kernel.unprivileged_bpf_disabled = 1 -The system configuration files need to be reloaded for the changes to take effect. To reload the contents of the files, run the following command: +The system configuration files must be reloaded for the changes to take effect. To reload the contents of the files, run the following command: -$ sudo sysctl --systemVerify that RHEL 9 prevents privilege escalation through the kernel by disabling access to the bpf system call with the following commands: +$ sysctl --systemVerify that RHEL 9 prevents privilege escalation through the kernel by disabling access to the bpf system call with the following commands: -$ sudo sysctl kernel.unprivileged_bpf_disabled +$ sysctl kernel.unprivileged_bpf_disabled kernel.unprivileged_bpf_disabled = 1 If the returned line does not have a value of "1", or a line is not returned, this is a finding. -Check that the configuration files are present to enable this kernel parameter. +Check that the configuration files are present to enable this kernel parameter. $ sudo /usr/lib/systemd/systemd-sysctl --cat-config | egrep -v '^(#|;)' | grep -F kernel.unprivileged_bpf_disabled | tail -1 + kernel.unprivileged_bpf_disabled = 1 -If the network parameter "kernel.unprivileged_bpf_disabled" is not equal to "1", or nothing is returned, this is a finding.SRG-OS-000132-GPOS-00067<GroupDescription></GroupDescription>RHEL-09-213080RHEL 9 must restrict usage of ptrace to descendant processes.<VulnDiscussion>Unrestricted usage of ptrace allows compromised binaries to run ptrace on other processes of the user. Like this, the attacker can steal sensitive information from the target processes (e.g., SSH sessions, web browser, etc.) without any additional assistance from the user (i.e., without resorting to phishing). +If the network parameter "kernel.unprivileged_bpf_disabled" is not equal to "1", or nothing is returned, this is a finding.SRG-OS-000132-GPOS-00067<GroupDescription></GroupDescription>RHEL-09-213080RHEL 9 must restrict usage of ptrace to descendant processes.<VulnDiscussion>Unrestricted usage of ptrace allows compromised binaries to run ptrace on other processes of the user. Like this, the attacker can steal sensitive information from the target processes (e.g., SSH sessions, web browser, etc.) without any additional assistance from the user (i.e., without resorting to phishing). -Satisfies: SRG-OS-000132-GPOS-00067, SRG-OS-000480-GPOS-00227</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000366CCI-001082Configure RHEL 9 to restrict usage of ptrace to descendant processes by adding the following line to a file, in the "/etc/sysctl.d" directory: +Satisfies: SRG-OS-000132-GPOS-00067, SRG-OS-000480-GPOS-00227</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-001082Configure the currently loaded kernel parameter to the secure setting: + +$ sudo sysctl -w kernel.yama.ptrace_scope=1 + +Configure RHEL 9 to restrict usage of ptrace to descendant processes by adding the following line to a file in the "/etc/sysctl.d" directory: kernel.yama.ptrace_scope = 1 -The system configuration files need to be reloaded for the changes to take effect. To reload the contents of the files, run the following command: +The system configuration files must be reloaded for the changes to take effect. To reload the contents of the files, run the following command: -$ sudo sysctl --systemVerify RHEL 9 restricts usage of ptrace to descendant processes with the following commands: +$ sysctl --systemVerify RHEL 9 restricts the usage of ptrace to descendant processes with the following commands: -$ sudo sysctl kernel.yama.ptrace_scope +$ sysctl kernel.yama.ptrace_scope kernel.yama.ptrace_scope = 1 @@ -618,22 +630,23 @@ If the returned line does not have a value of "1", or a line is not returned, th Check that the configuration files are present to enable this kernel parameter. -$ sudo /usr/lib/systemd/systemd-sysctl --cat-config | egrep -v '^(#|;)' | grep -F kernel.yama.ptrace_scope| tail -1 +$ sudo /usr/lib/systemd/systemd-sysctl --cat-config | egrep -v '^(#|;)' | grep -F kernel.yama.ptrace_scope| tail -1 + kernel.yama.ptrace_scope = 1 -If the network parameter "kernel.yama.ptrace_scope" is not equal to "1", or nothing is returned, this is a finding.SRG-OS-000480-GPOS-00227<GroupDescription></GroupDescription>RHEL-09-213085RHEL 9 must disable core dump backtraces.<VulnDiscussion>A core dump includes a memory image taken at the time the operating system terminates an application. The memory image could contain sensitive data and is generally useful only for developers or system operators trying to debug problems. +If the network parameter "kernel.yama.ptrace_scope" is not equal to "1", or nothing is returned, this is a finding.SRG-OS-000480-GPOS-00227<GroupDescription></GroupDescription>RHEL-09-213085RHEL 9 must disable core dump backtraces.<VulnDiscussion>A core dump includes a memory image taken at the time the operating system terminates an application. The memory image could contain sensitive data and is generally useful only for developers or system operators trying to debug problems. Enabling core dumps on production systems is not recommended; however, there may be overriding operational requirements to enable advanced debugging. Permitting temporary enablement of core dumps during such situations must be reviewed through local needs and policy.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000366Configure the operating system to disable core dump backtraces. Add or modify the following line in /etc/systemd/coredump.conf: -ProcessSizeMax=0Verify RHEL 9 disables core dump backtraces by issuing the following command: - -$ grep -i process /etc/systemd/coredump.conf - -ProcessSizeMax=0 - -If the "ProcessSizeMax" item is missing, commented out, or the value is anything other than "0" and the need for core dumps is not documented with the information system security officer (ISSO) as an operational requirement for all domains that have the "core" item assigned, this is a finding.SRG-OS-000480-GPOS-00227<GroupDescription></GroupDescription>RHEL-09-213090RHEL 9 must disable storing core dumps.<VulnDiscussion>A core dump includes a memory image taken at the time the operating system terminates an application. The memory image could contain sensitive data and is generally useful only for developers or system operators trying to debug problems. Enabling core dumps on production systems is not recommended; however, there may be overriding operational requirements to enable advanced debugging. Permitting temporary enablement of core dumps during such situations must be reviewed through local needs and policy.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000366Configure the operating system to disable storing core dumps for all users. +ProcessSizeMax=0Verify RHEL 9 disables core dump backtraces by issuing the following command: + +$ grep -i ProcessSizeMax /etc/systemd/coredump.conf + +ProcessSizeMax=0 + +If the "ProcessSizeMax" item is missing or commented out, or the value is anything other than "0", and the need for core dumps is not documented with the information system security officer (ISSO) as an operational requirement for all domains that have the "core" item assigned, this is a finding.SRG-OS-000480-GPOS-00227<GroupDescription></GroupDescription>RHEL-09-213090RHEL 9 must disable storing core dumps.<VulnDiscussion>A core dump includes a memory image taken at the time the operating system terminates an application. The memory image could contain sensitive data and is generally useful only for developers or system operators trying to debug problems. Enabling core dumps on production systems is not recommended; however, there may be overriding operational requirements to enable advanced debugging. Permitting temporary enablement of core dumps during such situations must be reviewed through local needs and policy.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000366Configure the operating system to disable storing core dumps for all users. Add or modify the following line in /etc/systemd/coredump.conf: @@ -702,7 +715,7 @@ $ sudo dmesg | grep '[NX|DX]*protection' [ 0.000000] NX (Execute Disable) protection: active -If "dmesg" does not show "NX (Execute Disable) protection" active, this is a finding.SRG-OS-000480-GPOS-00227<GroupDescription></GroupDescription>RHEL-09-213115The kdump service on RHEL 9 must be disabled.<VulnDiscussion>Kernel core dumps may contain the full contents of system memory at the time of the crash. Kernel core dumps consume a considerable amount of disk space and may result in denial of service by exhausting the available space on the target file system partition. Unless the system is used for kernel development or testing, there is little need to run the kdump service.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000366Disable and mask the kdump service on RHEL 9. +If "dmesg" does not show "NX (Execute Disable) protection" active, this is a finding.SRG-OS-000480-GPOS-00227<GroupDescription></GroupDescription>RHEL-09-213115The kdump service on RHEL 9 must be disabled.<VulnDiscussion>Kernel core dumps may contain the full contents of system memory at the time of the crash. Kernel core dumps consume a considerable amount of disk space and may result in denial of service by exhausting the available space on the target file system partition. Unless the system is used for kernel development or testing, there is little need to run the kdump service.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000366Disable and mask the kdump service on RHEL 9. To disable the kdump service run the following command: @@ -710,24 +723,23 @@ $ sudo systemctl disable --now kdump To mask the kdump service run the following command: -$ sudo systemctl mask --now kdumpVerify that the kdump service is disabled in system boot configuration with the following command: +$ sudo systemctl mask --now kdumpVerify that the kdump service is disabled in system boot configuration with the following command: -$ systemctl is-enabled kdump +$ sudo systemctl is-enabled kdump disabled Verify that the kdump service is not active (i.e., not running) through current runtime configuration with the following command: -$ systemctl is-active kdump +$ sudo systemctl is-active kdump -inactive +masked Verify that the kdump service is masked with the following command: $ sudo systemctl show kdump | grep "LoadState\|UnitFileState" LoadState=masked - UnitFileState=masked If the "kdump" service is loaded or active, and is not masked, this is a finding.SRG-OS-000366-GPOS-00153<GroupDescription></GroupDescription>RHEL-09-214010RHEL 9 must ensure cryptographic verification of vendor software packages.<VulnDiscussion>Cryptographic verification of vendor software packages ensures that all software packages are obtained from a valid source and protects against spoofing that could lead to installation of malware on the system. Red Hat cryptographically signs all software packages, which includes updates, with a GPG key to verify that they are valid.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-003992CCI-001749Install Red Hat package-signing keys on the system and verify their fingerprints match vendor values. @@ -772,7 +784,7 @@ uid Red Hat, Inc. (auxiliary key 3) <security@redhat.com> Compare key fingerprints of installed Red Hat GPG keys with fingerprints listed for RHEL 9 on Red Hat "Product Signing Keys" webpage at https://access.redhat.com/security/team/key. -If key fingerprints do not match, this is a finding.SRG-OS-000366-GPOS-00153<GroupDescription></GroupDescription>RHEL-09-214015RHEL 9 must check the GPG signature of software packages originating from external software repositories before installation.<VulnDiscussion>Changes to any software components can have significant effects on the overall security of the operating system. This requirement ensures the software has not been tampered with and that it has been provided by a trusted vendor. +If key fingerprints do not match, this is a finding.SRG-OS-000366-GPOS-00153<GroupDescription></GroupDescription>RHEL-09-214015RHEL 9 must check the GPG signature of software packages originating from external software repositories before installation.<VulnDiscussion>Changes to any software components can have significant effects on the overall security of the operating system. This requirement ensures the software has not been tampered with and that it has been provided by a trusted vendor. All software packages must be signed with a cryptographic key recognized and approved by the organization. @@ -780,9 +792,9 @@ Verifying the authenticity of software prior to installation validates the integ Add or update the following line in the [main] section of the /etc/dnf/dnf.conf file: -gpgcheck=1Verify that dnf always checks the GPG signature of software packages originating from external software repositories before installation: +gpgcheck=1Verify that dnf always checks the GPG signature of software packages originating from external software repositories before installation: -$ grep gpgcheck /etc/dnf/dnf.conf +$ grep -w gpgcheck /etc/dnf/dnf.conf gpgcheck=1 @@ -804,88 +816,97 @@ localpkg_gpgcheck=1 If "localpkg_gpgcheck" is not set to "1", or if the option is missing or commented out, ask the system administrator how the GPG signatures of local software packages are being verified. -If there is no process to verify GPG signatures that is approved by the organization, this is a finding.SRG-OS-000366-GPOS-00153<GroupDescription></GroupDescription>RHEL-09-214025RHEL 9 must have GPG signature verification enabled for all software repositories.<VulnDiscussion>Changes to any software components can have significant effects on the overall security of the operating system. This requirement ensures the software has not been tampered with and that it has been provided by a trusted vendor. +If there is no process to verify GPG signatures that is approved by the organization, this is a finding.SRG-OS-000366-GPOS-00153<GroupDescription></GroupDescription>RHEL-09-214025RHEL 9 must have GPG signature verification enabled for all software repositories.<VulnDiscussion>Changes to any software components can have significant effects on the overall security of the operating system. This requirement ensures the software has not been tampered with and that it has been provided by a trusted vendor. All software packages must be signed with a cryptographic key recognized and approved by the organization. Verifying the authenticity of software prior to installation validates the integrity of the software package received from a vendor. This verifies the software has not been tampered with and that it has been provided by a trusted vendor.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-003992CCI-001749Configure all software repositories defined in "/etc/yum.repos.d/" to have "gpgcheck" enabled: -$ sudo sed -i 's/gpgcheck\s*=.*/gpgcheck=1/g' /etc/yum.repos.d/*Verify that all software repositories defined in "/etc/yum.repos.d/" have been configured with "gpgcheck" enabled: +$ sudo sed -i 's/gpgcheck\s*=.*/gpgcheck=1/g' /etc/yum.repos.d/*Verify that all software repositories defined in "/etc/yum.repos.d/" have been configured with "gpgcheck" enabled: -$ grep gpgcheck /etc/yum.repos.d/*.repo | more +$ grep -w gpgcheck /etc/yum.repos.d/*.repo | more gpgcheck = 1 -If "gpgcheck" is not set to "1" for all returned lines, this is a finding.SRG-OS-000480-GPOS-00227<GroupDescription></GroupDescription>RHEL-09-214030RHEL 9 must be configured so that the cryptographic hashes of system files match vendor values.<VulnDiscussion>The hashes of important files like system executables should match the information given by the RPM database. Executables with erroneous hashes could be a sign of nefarious activity on the system.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000366Given output from the check command, identify the package that provides the output and reinstall it. The following trimmed example output shows a package that has failed verification, been identified, and been reinstalled: +If "gpgcheck" is not set to "1" for all returned lines, this is a finding.SRG-OS-000480-GPOS-00227<GroupDescription></GroupDescription>RHEL-09-214030RHEL 9 must be configured so that the cryptographic hashes of system files match vendor values.<VulnDiscussion>The hashes of important files such as system executables should match the information given by the RPM database. Executables with erroneous hashes could be a sign of nefarious activity on the system.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000366Configure RHEL 9 so that the cryptographic hashes of system files match vendor values. + +Given output from the check command, identify the package that provides the output and reinstall it. The following trimmed example output shows a package that has failed verification, been identified, and been reinstalled: -$ rpm -Va --noconfig | awk '$1 ~ /..5/ && $2 != "c"' +$ sudo rpm -Va --noconfig | awk '$1 ~ /..5/ && $2 != "c"' S.5....T. /usr/bin/znew + $ sudo dnf provides /usr/bin/znew [...] gzip-1.10-8.el9.x86_64 : The GNU data compression program [...] -$ sudo dnf reinstall gzip + +$ sudo dnf -y reinstall gzip [...] -$ rpm -Va --noconfig | awk '$1 ~ /..5/ && $2 != "c"' -[no output]The following command will list which files on the system have file hashes different from what is expected by the RPM database: - $ rpm -Va --noconfig | awk '$1 ~ /..5/ && $2 != "c"' +$ sudo rpm -Va --noconfig | awk '$1 ~ /..5/ && $2 != "c"' +[no output]Verify that RHEL 9 is configured so that the cryptographic hashes of system files match vendor values. + +List files on the system that have file hashes different from what is expected by the RPM database with the following command: + +$ sudo rpm -Va --noconfig | awk '$1 ~ /..5/ && $2 != "c"' -If there is output, this is a finding.SRG-OS-000437-GPOS-00194<GroupDescription></GroupDescription>RHEL-09-214035RHEL 9 must remove all software components after updated versions have been installed.<VulnDiscussion>Previous versions of software components that are not removed from the information system after updates have been installed may be exploited by some adversaries.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-002617Configure RHEL 9 to remove all software components after updated versions have been installed. +If there is output, this is a finding.SRG-OS-000437-GPOS-00194<GroupDescription></GroupDescription>RHEL-09-214035RHEL 9 must remove all software components after updated versions have been installed.<VulnDiscussion>Previous versions of software components that are not removed from the information system after updates have been installed may be exploited by some adversaries.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-002617Configure RHEL 9 to remove all software components after updated versions have been installed. Edit the file /etc/dnf/dnf.conf by adding or editing the following line: - clean_requirements_on_remove=1Verify RHEL 9 removes all software components after updated versions have been installed with the following command: + clean_requirements_on_remove=TrueVerify RHEL 9 removes all software components after updated versions have been installed with the following command: -$ grep clean /etc/dnf/dnf.conf +$ grep -i clean_requirements_on_remove /etc/dnf/dnf.conf -clean_requirements_on_remove=1 +clean_requirements_on_remove=True -If "clean_requirements_on_remove" is not set to "1", this is a finding.SRG-OS-000366-GPOS-00153<GroupDescription></GroupDescription>RHEL-09-215010RHEL 9 subscription-manager package must be installed.<VulnDiscussion>The Red Hat Subscription Manager application manages software subscriptions and software repositories for installed software products on the local system. It communicates with backend servers, such as the Red Hat Customer Portal or an on-premise instance of Subscription Asset Manager, to register the local system and grant access to software resources determined by the subscription entitlement.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-003992CCI-001749The subscription-manager package can be installed with the following command: +If "clean_requirements_on_remove" is not set to "True", this is a finding.SRG-OS-000366-GPOS-00153<GroupDescription></GroupDescription>RHEL-09-215010RHEL 9 subscription-manager package must be installed.<VulnDiscussion>The Red Hat Subscription Manager application manages software subscriptions and software repositories for installed software products on the local system. It communicates with backend servers, such as the Red Hat Customer Portal or an on-premise instance of Subscription Asset Manager, to register the local system and grant access to software resources determined by the subscription entitlement.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-003992CCI-001749The subscription-manager package can be installed with the following command: -$ sudo dnf install subscription-managerVerify that RHEL 9 subscription-manager package is installed with the following command: +$ sudo dnf install subscription-managerVerify that RHEL 9 subscription-manager package is installed with the following command: -$ sudo dnf list --installed subscription-manager +$ dnf list --installed subscription-manager Example output: subscription-manager.x86_64 1.29.26-3.el9_0 -If the "subscription-manager" package is not installed, this is a finding.SRG-OS-000074-GPOS-00042<GroupDescription></GroupDescription>RHEL-09-215015RHEL 9 must not have a File Transfer Protocol (FTP) server package installed.<VulnDiscussion>The FTP service provides an unencrypted remote access that does not provide for the confidentiality and integrity of user passwords or the remote session. If a privileged user were to log on using this service, the privileged user password could be compromised. SSH or other encrypted file transfer methods must be used in place of this service. +If the "subscription-manager" package is not installed, this is a finding.SRG-OS-000074-GPOS-00042<GroupDescription></GroupDescription>RHEL-09-215015RHEL 9 must not have a File Transfer Protocol (FTP) server package installed.<VulnDiscussion>The FTP service provides an unencrypted remote access that does not provide for the confidentiality and integrity of user passwords or the remote session. If a privileged user were to log on using this service, the privileged user password could be compromised. SSH or other encrypted file transfer methods must be used in place of this service. Removing the "vsftpd" package decreases the risk of accidental activation. -Satisfies: SRG-OS-000074-GPOS-00042, SRG-OS-000095-GPOS-00049, SRG-OS-000480-GPOS-00227</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000197CCI-000366CCI-000381The ftp package can be removed with the following command (using vsftpd as an example): +Satisfies: SRG-OS-000074-GPOS-00042, SRG-OS-000095-GPOS-00049, SRG-OS-000480-GPOS-00227</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000197CCI-000381The ftp package can be removed with the following command (using vsftpd as an example): -$ sudo dnf remove vsftpdVerify that RHEL 9 does not have a File Transfer Protocol (FTP) server package installed with the following command: +$ sudo dnf remove vsftpdVerify that RHEL 9 does not have a File Transfer Protocol (FTP) server package installed with the following command: -$ sudo dnf list --installed | grep ftp +$ rpm -q vsftpd -If the "ftp" package is installed, this is a finding.SRG-OS-000480-GPOS-00227<GroupDescription></GroupDescription>RHEL-09-215020RHEL 9 must not have the sendmail package installed.<VulnDiscussion>The sendmail software was not developed with security in mind, and its design prevents it from being effectively contained by SELinux. Postfix must be used instead. +package vsftpd is not installed -Satisfies: SRG-OS-000480-GPOS-00227, SRG-OS-000095-GPOS-00049</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000366CCI-000381Remove the sendmail package with the following command: +If the "ftp" package is installed, this is a finding.SRG-OS-000480-GPOS-00227<GroupDescription></GroupDescription>RHEL-09-215020RHEL 9 must not have the sendmail package installed.<VulnDiscussion>The sendmail software was not developed with security in mind, and its design prevents it from being effectively contained by SELinux. Postfix must be used instead. -$ sudo dnf remove sendmailVerify that the sendmail package is not installed with the following command: +Satisfies: SRG-OS-000480-GPOS-00227, SRG-OS-000095-GPOS-00049</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000381Remove the sendmail package with the following command: -$ sudo dnf list --installed sendmail +$ sudo dnf remove sendmailVerify that the sendmail package is not installed with the following command: + +$ dnf list --installed sendmail Error: No matching Packages to list -If the "sendmail" package is installed, this is a finding.SRG-OS-000095-GPOS-00049<GroupDescription></GroupDescription>RHEL-09-215025RHEL 9 must not have the nfs-utils package installed.<VulnDiscussion>"nfs-utils" provides a daemon for the kernel NFS server and related tools. This package also contains the "showmount" program. "showmount" queries the mount daemon on a remote host for information about the Network File System (NFS) server on the remote host. For example, "showmount" can display the clients that are mounted on that host.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000381Remove the nfs-utils package with the following command: +If the "sendmail" package is installed, this is a finding.SRG-OS-000095-GPOS-00049<GroupDescription></GroupDescription>RHEL-09-215025RHEL 9 must not have the nfs-utils package installed.<VulnDiscussion>"nfs-utils" provides a daemon for the kernel NFS server and related tools. This package also contains the "showmount" program. "showmount" queries the mount daemon on a remote host for information about the Network File System (NFS) server on the remote host. For example, "showmount" can display the clients that are mounted on that host.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000381Remove the nfs-utils package with the following command: -$ sudo dnf remove nfs-utilsVerify that the nfs-utils package is not installed with the following command: +$ sudo dnf remove nfs-utilsVerify that the nfs-utils package is not installed with the following command: -$ sudo dnf list --installed nfs-utils +$ dnf list --installed nfs-utils Error: No matching Packages to list -If the "nfs-utils" package is installed, this is a finding.SRG-OS-000095-GPOS-00049<GroupDescription></GroupDescription>RHEL-09-215030RHEL 9 must not have the ypserv package installed.<VulnDiscussion>The NIS service provides an unencrypted authentication service, which does not provide for the confidentiality and integrity of user passwords or the remote session. +If the "nfs-utils" package is installed, this is a finding.SRG-OS-000095-GPOS-00049<GroupDescription></GroupDescription>RHEL-09-215030RHEL 9 must not have the ypserv package installed.<VulnDiscussion>The NIS service provides an unencrypted authentication service, which does not provide for the confidentiality and integrity of user passwords or the remote session. Removing the "ypserv" package decreases the risk of the accidental (or intentional) activation of NIS or NIS+ services.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000381Remove the ypserv package with the following command: -$ sudo dnf remove ypservVerify that the ypserv package is not installed with the following command: +$ sudo dnf remove ypservVerify that the ypserv package is not installed with the following command: -$ sudo dnf list --installed ypserv +$ dnf list --installed ypserv Error: No matching Packages to list @@ -897,79 +918,79 @@ $ sudo dnf list --installed rsh-server Error: No matching Packages to list -If the "rsh-server" package is installed, this is a finding.SRG-OS-000095-GPOS-00049<GroupDescription></GroupDescription>RHEL-09-215040RHEL 9 must not have the telnet-server package installed.<VulnDiscussion>It is detrimental for operating systems to provide, or install by default, functionality exceeding requirements or mission objectives. These unnecessary capabilities are often overlooked and therefore, may remain unsecure. They increase the risk to the platform by providing additional attack vectors. +If the "rsh-server" package is installed, this is a finding.SRG-OS-000095-GPOS-00049<GroupDescription></GroupDescription>RHEL-09-215040RHEL 9 must not have the telnet-server package installed.<VulnDiscussion>It is detrimental for operating systems to provide, or install by default, functionality exceeding requirements or mission objectives. These unnecessary capabilities are often overlooked and therefore, may remain unsecure. They increase the risk to the platform by providing additional attack vectors. The telnet service provides an unencrypted remote access service, which does not provide for the confidentiality and integrity of user passwords or the remote session. If a privileged user were to login using this service, the privileged user password could be compromised. Removing the "telnet-server" package decreases the risk of accidental (or intentional) activation of the telnet service.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000381Remove the telnet-server package with the following command: -$ sudo dnf remove telnet-serverVerify that the telnet-server package is not installed with the following command: +$ sudo dnf remove telnet-serverVerify that the telnet-server package is not installed with the following command: -$ sudo dnf list --installed telnet-server +$ dnf list --installed telnet-server Error: No matching Packages to list -If the "telnet-server" package is installed, this is a finding.SRG-OS-000095-GPOS-00049<GroupDescription></GroupDescription>RHEL-09-215045RHEL 9 must not have the gssproxy package installed.<VulnDiscussion>It is detrimental for operating systems to provide, or install by default, functionality exceeding requirements or mission objectives. These unnecessary capabilities or services are often overlooked and therefore, may remain unsecured. They increase the risk to the platform by providing additional attack vectors. +If the "telnet-server" package is installed, this is a finding.SRG-OS-000095-GPOS-00049<GroupDescription></GroupDescription>RHEL-09-215045RHEL 9 must not have the gssproxy package installed.<VulnDiscussion>It is detrimental for operating systems to provide, or install by default, functionality exceeding requirements or mission objectives. These unnecessary capabilities or services are often overlooked and therefore, may remain unsecured. They increase the risk to the platform by providing additional attack vectors. Operating systems are capable of providing a wide variety of functions and services. Some of the functions and services provided by default may not be necessary to support essential organizational operations (e.g., key missions, functions). The gssproxy package is a proxy for GSS API credential handling and could expose secrets on some networks. It is not needed for normal function of the OS. -Satisfies: SRG-OS-000095-GPOS-00049, SRG-OS-000480-GPOS-00227</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000366CCI-000381Remove the gssproxy package with the following command: +Satisfies: SRG-OS-000095-GPOS-00049, SRG-OS-000480-GPOS-00227</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000381Remove the gssproxy package with the following command: -$ sudo dnf remove gssproxyVerify that the gssproxy package is not installed with the following command: +$ sudo dnf remove gssproxyVerify that the gssproxy package is not installed with the following command: -$ sudo dnf list --installed gssproxy +$ dnf list --installed gssproxy Error: No matching Packages to list -If the "gssproxy" package is installed and is not documented with the information system security officer (ISSO) as an operational requirement, this is a finding.SRG-OS-000095-GPOS-00049<GroupDescription></GroupDescription>RHEL-09-215050RHEL 9 must not have the iprutils package installed.<VulnDiscussion>It is detrimental for operating systems to provide, or install by default, functionality exceeding requirements or mission objectives. These unnecessary capabilities or services are often overlooked and therefore may remain unsecured. They increase the risk to the platform by providing additional attack vectors. +If the "gssproxy" package is installed and is not documented with the information system security officer (ISSO) as an operational requirement, this is a finding.SRG-OS-000095-GPOS-00049<GroupDescription></GroupDescription>RHEL-09-215050RHEL 9 must not have the iprutils package installed.<VulnDiscussion>It is detrimental for operating systems to provide, or install by default, functionality exceeding requirements or mission objectives. These unnecessary capabilities or services are often overlooked and therefore may remain unsecured. They increase the risk to the platform by providing additional attack vectors. Operating systems are capable of providing a wide variety of functions and services. Some of the functions and services, provided by default, may not be necessary to support essential organizational operations (e.g., key missions, functions). The iprutils package provides a suite of utilities to manage and configure SCSI devices supported by the ipr SCSI storage device driver. -Satisfies: SRG-OS-000095-GPOS-00049, SRG-OS-000480-GPOS-00227</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000366CCI-000381Remove the iprutils package with the following command: +Satisfies: SRG-OS-000095-GPOS-00049, SRG-OS-000480-GPOS-00227</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000381Remove the iprutils package with the following command: -$ sudo dnf remove iprutilsVerify that the iprutils package is not installed with the following command: +$ sudo dnf remove iprutilsVerify that the iprutils package is not installed with the following command: -$ sudo dnf list --installed iprutils +$ dnf list --installed iprutils Error: No matching Packages to list -If the "iprutils" package is installed and is not documented with the information system security officer (ISSO) as an operational requirement, this is a finding.SRG-OS-000095-GPOS-00049<GroupDescription></GroupDescription>RHEL-09-215055RHEL 9 must not have the tuned package installed.<VulnDiscussion>It is detrimental for operating systems to provide, or install by default, functionality exceeding requirements or mission objectives. These unnecessary capabilities or services are often overlooked and therefore may remain unsecured. They increase the risk to the platform by providing additional attack vectors. +If the "iprutils" package is installed and is not documented with the information system security officer (ISSO) as an operational requirement, this is a finding.SRG-OS-000095-GPOS-00049<GroupDescription></GroupDescription>RHEL-09-215055RHEL 9 must not have the tuned package installed.<VulnDiscussion>It is detrimental for operating systems to provide, or install by default, functionality exceeding requirements or mission objectives. These unnecessary capabilities or services are often overlooked and therefore may remain unsecured. They increase the risk to the platform by providing additional attack vectors. Operating systems are capable of providing a wide variety of functions and services. Some of the functions and services, provided by default, may not be necessary to support essential organizational operations (e.g., key missions, functions). The tuned package contains a daemon that tunes the system settings dynamically. It does so by monitoring the usage of several system components periodically. Based on that information, components will then be put into lower or higher power savings modes to adapt to the current usage. The tuned package is not needed for normal OS operations. -Satisfies: SRG-OS-000095-GPOS-00049, SRG-OS-000480-GPOS-00227</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000366CCI-000381Remove the tuned package with the following command: +Satisfies: SRG-OS-000095-GPOS-00049, SRG-OS-000480-GPOS-00227</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000381Remove the tuned package with the following command: -$ sudo dnf remove tunedVerify that the tuned package is not installed with the following command: +$ sudo dnf remove tunedVerify that the tuned package is not installed with the following command: -$ sudo dnf list --installed tuned +$ dnf list --installed tuned Error: No matching Packages to list -If the "tuned" package is installed and is not documented with the information system security officer (ISSO) as an operational requirement, this is a finding.SRG-OS-000480-GPOS-00227<GroupDescription></GroupDescription>RHEL-09-215060RHEL 9 must not have a Trivial File Transfer Protocol (TFTP) server package installed.<VulnDiscussion>Removing the "tftp-server" package decreases the risk of the accidental (or intentional) activation of tftp services. +If the "tuned" package is installed and is not documented with the information system security officer (ISSO) as an operational requirement, this is a finding.SRG-OS-000480-GPOS-00227<GroupDescription></GroupDescription>RHEL-09-215060RHEL 9 must not have a Trivial File Transfer Protocol (TFTP) server package installed.<VulnDiscussion>Removing the "tftp-server" package decreases the risk of the accidental (or intentional) activation of tftp services. If TFTP is required for operational support (such as transmission of router configurations), its use must be documented with the information systems security manager (ISSM), restricted to only authorized personnel, and have access control rules established.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000366The "tftp-server" package can be removed with the following command: -$ sudo dnf remove tftp-serverVerify that RHEL 9 does not have a "tftp-server" package installed with the following command: +$ sudo dnf remove tftp-serverVerify that RHEL 9 does not have a "tftp-server" package installed with the following command: -$ sudo dnf list --installed | grep tftp-server +$ dnf list --installed | grep tftp-server -If the "tftp-server" package is installed, this is a finding.SRG-OS-000480-GPOS-00227<GroupDescription></GroupDescription>RHEL-09-215065RHEL 9 must not have the quagga package installed.<VulnDiscussion>Quagga is a network routing software suite providing implementations of Open Shortest Path First (OSPF), Routing Information Protocol (RIP), Border Gateway Protocol (BGP) for Unix and Linux platforms. +If the "tftp-server" package is installed, this is a finding.SRG-OS-000480-GPOS-00227<GroupDescription></GroupDescription>RHEL-09-215065RHEL 9 must not have the quagga package installed.<VulnDiscussion>Quagga is a network routing software suite providing implementations of Open Shortest Path First (OSPF), Routing Information Protocol (RIP), Border Gateway Protocol (BGP) for Unix and Linux platforms. If there is no need to make the router software available, removing it provides a safeguard against its activation.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000366Remove the quagga package with the following command: -$ sudo dnf remove quaggaVerify that the quagga package is not installed with the following command: +$ sudo dnf remove quaggaVerify that the quagga package is not installed with the following command: -$ sudo dnf list --installed quagga +$ dnf list --installed quagga Error: No matching Packages to list -If the "quagga" package is installed, and is not documented with the information system security officer (ISSO) as an operational requirement, this is a finding.SRG-OS-000480-GPOS-00227<GroupDescription></GroupDescription>RHEL-09-215070A graphical display manager must not be installed on RHEL 9 unless approved.<VulnDiscussion>Unnecessary service packages must not be installed to decrease the attack surface of the system. Graphical display managers have a long history of security vulnerabilities and must not be used, unless approved and documented.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000366Document the requirement for a graphical user interface with the ISSO or remove all xorg packages with the following command: +If the "quagga" package is installed and is not documented with the information system security officer (ISSO) as an operational requirement, this is a finding.SRG-OS-000480-GPOS-00227<GroupDescription></GroupDescription>RHEL-09-215070A graphical display manager must not be installed on RHEL 9 unless approved.<VulnDiscussion>Unnecessary service packages must not be installed to decrease the attack surface of the system. Graphical display managers have a long history of security vulnerabilities and must not be used, unless approved and documented.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000366Document the requirement for a graphical user interface with the ISSO or remove all xorg packages with the following command: Warning: If you are accessing the system through the graphical user interface, change to the multi-user.target with the following command: @@ -978,28 +999,27 @@ $ sudo systemctl isolate multi-user.target Warning: Removal of the graphical user interface will immediately render it useless. The following commands must not be run from a virtual terminal emulator in the graphical interface. $ sudo dnf remove "xorg*" -$ sudo systemctl set-default multi-user.targetVerify that a graphical user interface is not installed with the following command: - -$ sudo dnf list --installed "xorg*common" +$ sudo systemctl set-default multi-user.targetVerify that a graphical user interface is not installed with the following command: +$ dnf list --installed "xorg-x11-server-common" Error: No matching Packages to list -If the "x11-server-common" package is installed, and the use of a graphical user interface has not been documented with the information system security officer (ISSO) as an operational requirement, this is a finding.SRG-OS-000105-GPOS-00052<GroupDescription></GroupDescription>RHEL-09-215075RHEL 9 must have the openssl-pkcs11 package installed.<VulnDiscussion>Without the use of multifactor authentication, the ease of access to privileged functions is greatly increased. Multifactor authentication requires using two or more factors to achieve authentication. A privileged account is defined as an information system account with authorizations of a privileged user. The DOD common access card (CAC) with DOD-approved PKI is an example of multifactor authentication. +If the "xorg-x11-server-common" package is installed, and the use of a graphical user interface has not been documented with the information system security officer (ISSO) as an operational requirement, this is a finding.SRG-OS-000105-GPOS-00052<GroupDescription></GroupDescription>RHEL-09-215075RHEL 9 must have the openssl-pkcs11 package installed.<VulnDiscussion>Without the use of multifactor authentication, the ease of access to privileged functions is greatly increased. Multifactor authentication requires using two or more factors to achieve authentication. A privileged account is defined as an information system account with authorizations of a privileged user. The DOD common access card (CAC) with DOD-approved PKI is an example of multifactor authentication. Satisfies: SRG-OS-000105-GPOS-00052, SRG-OS-000375-GPOS-00160, SRG-OS-000376-GPOS-00161, SRG-OS-000377-GPOS-00162</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000765CCI-004046CCI-001953CCI-001954CCI-001948The openssl-pkcs11 package can be installed with the following command: -$ sudo dnf install openssl-pkcs11Verify that RHEL 9 has the openssl-pkcs11 package installed with the following command: +$ sudo dnf install openssl-pkcs11Note: If the system administrator demonstrates the use of an approved alternate multifactor authentication method, this requirement is Not Applicable. -$ sudo dnf list --installed openssl-pkcs11 +Verify that RHEL 9 has the openssl-pkcs11 package installed with the following command: + +$ dnf list --installed openssl-pkcs11 Example output: openssl-pkcs.i686 0.4.11-7.el9 openssl-pkcs.x86_64 0.4.11-7.el9 -If the "openssl-pkcs11" package is not installed, this is a finding. - -Note: If the system administrator demonstrates the use of an approved alternate multifactor authentication method, this requirement is not applicable.SRG-OS-000480-GPOS-00227<GroupDescription></GroupDescription>RHEL-09-215080RHEL 9 must have the gnutls-utils package installed.<VulnDiscussion>GnuTLS is a secure communications library implementing the SSL, TLS and DTLS protocols and technologies around them. It provides a simple C language application programming interface (API) to access the secure communications protocols as well as APIs to parse and write X.509, PKCS #12, OpenPGP and other required structures. This package contains command line TLS client and server and certificate manipulation tools.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000366The gnutls-utils package can be installed with the following command: +If the "openssl-pkcs11" package is not installed, this is a finding.SRG-OS-000480-GPOS-00227<GroupDescription></GroupDescription>RHEL-09-215080RHEL 9 must have the gnutls-utils package installed.<VulnDiscussion>GnuTLS is a secure communications library implementing the SSL, TLS and DTLS protocols and technologies around them. It provides a simple C language application programming interface (API) to access the secure communications protocols as well as APIs to parse and write X.509, PKCS #12, OpenPGP and other required structures. This package contains command line TLS client and server and certificate manipulation tools.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000366The gnutls-utils package can be installed with the following command: $ sudo dnf install gnutls-utilsVerify that RHEL 9 has the gnutls-utils package installed with the following command: @@ -1019,25 +1039,25 @@ Example output: nss-tools.x86_64 3.71.0-7.el9 -If the "nss-tools" package is not installed, this is a finding.SRG-OS-000480-GPOS-00227<GroupDescription></GroupDescription>RHEL-09-215090RHEL 9 must have the rng-tools package installed.<VulnDiscussion>"rng-tools" provides hardware random number generator tools, such as those used in the formation of x509/PKI certificates.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000366The rng-tools package can be installed with the following command: +If the "nss-tools" package is not installed, this is a finding.SRG-OS-000480-GPOS-00227<GroupDescription></GroupDescription>RHEL-09-215090RHEL 9 must have the rng-tools package installed.<VulnDiscussion>"rng-tools" provides hardware random number generator tools, such as those used in the formation of x509/PKI certificates.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000366The rng-tools package can be installed with the following command: -$ sudo dnf install rng-toolsVerify that RHEL 9 has the rng-tools package installed with the following command: +$ sudo dnf install rng-toolsVerify that RHEL 9 has the rng-tools package installed with the following command: -$ sudo dnf list --installed rng-tools +$ dnf list --installed rng-tools Example output: rng-tools.x86_64 6.14-2.git.b2b7934e.el9 -If the "rng-tools" package is not installed, this is a finding.SRG-OS-000363-GPOS-00150<GroupDescription></GroupDescription>RHEL-09-215095RHEL 9 must have the s-nail package installed.<VulnDiscussion>The "s-nail" package provides the mail command required to allow sending email notifications of unauthorized configuration changes to designated personnel.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-001744The s-nail package can be installed with the following command: +If the "rng-tools" package is not installed, this is a finding.SRG-OS-000363-GPOS-00150<GroupDescription></GroupDescription>RHEL-09-215095RHEL 9 must have the s-nail package installed.<VulnDiscussion>The "s-nail" package provides the mail command required to allow sending email notifications of unauthorized configuration changes to designated personnel.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-001744The s-nail package can be installed with the following command: -$ sudo dnf install s-nailVerify that RHEL 9 is configured to allow sending email notifications. +$ sudo dnf install s-nailVerify that RHEL 9 is configured to allow sending email notifications. Note: The "s-nail" package provides the "mail" command that is used to send email messages. Verify that the "s-nail" package is installed on the system: -$ sudo dnf list --installed s-nail +$ dnf list --installed s-nail s-nail.x86_64 14.9.22-6.el9 @@ -1047,73 +1067,77 @@ $ mount | grep /home UUID=fba5000f-2ffa-4417-90eb-8c54ae74a32f on /home type ext4 (rw,nodev,nosuid,noexec,seclabel) -If a separate entry for "/home" is not in use, this is a finding.SRG-OS-000480-GPOS-00227<GroupDescription></GroupDescription>RHEL-09-231015RHEL 9 must use a separate file system for /tmp.<VulnDiscussion>The "/tmp" partition is used as temporary storage by many programs. Placing "/tmp" in its own partition enables the setting of more restrictive mount options, which can help protect programs that use it.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000366Migrate the "/tmp" path onto a separate file system.Verify that a separate file system/partition has been created for "/tmp" with the following command: +If a separate entry for "/home" is not in use, this is a finding.SRG-OS-000480-GPOS-00227<GroupDescription></GroupDescription>RHEL-09-231015RHEL 9 must use a separate file system for /tmp.<VulnDiscussion>The "/tmp" partition is used as temporary storage by many programs. Placing "/tmp" in its own partition enables the setting of more restrictive mount options, which can help protect programs that use it.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000366Migrate the "/tmp" path onto a separate file system.Verify that a separate file system/partition has been created for "/tmp" with the following command: $ mount | grep /tmp -tmpfs /tmp tmpfs noatime,mode=1777 0 0 +/dev/mapper/rhel-tmp on /tmp type xfs (rw,nodev,nosuid,noexec,seclabel) -If a separate entry for "/tmp" is not in use, this is a finding.SRG-OS-000480-GPOS-00227<GroupDescription></GroupDescription>RHEL-09-231020RHEL 9 must use a separate file system for /var.<VulnDiscussion>Ensuring that "/var" is mounted on its own partition enables the setting of more restrictive mount options. This helps protect system services such as daemons or other programs which use it. It is not uncommon for the "/var" directory to contain world-writable directories installed by other software packages.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000366Migrate the "/var" path onto a separate file system.Verify that a separate file system/partition has been created for "/var" with the following command: +If a separate entry for "/tmp" is not in use, this is a finding.SRG-OS-000480-GPOS-00227<GroupDescription></GroupDescription>RHEL-09-231020RHEL 9 must use a separate file system for /var.<VulnDiscussion>Ensuring that "/var" is mounted on its own partition enables the setting of more restrictive mount options. This helps protect system services such as daemons or other programs which use it. It is not uncommon for the "/var" directory to contain world-writable directories installed by other software packages.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000366Migrate the "/var" path onto a separate file system.Verify that a separate file system/partition has been created for "/var" with the following command: $ mount | grep /var -UUID=c274f65f-c5b5-4481-b007-bee96feb8b05 /var xfs noatime 1 2 +/dev/mapper/rootvg-varlv on /var type xfs (rw,relatime,seclabel,attr2,inode64,logbufs=8,logbsize=32k,noquota) +Note: Options displayed for mount may differ. -If a separate entry for "/var" is not in use, this is a finding.SRG-OS-000480-GPOS-00227<GroupDescription></GroupDescription>RHEL-09-231025RHEL 9 must use a separate file system for /var/log.<VulnDiscussion>Placing "/var/log" in its own partition enables better separation between log files and other files in "/var/".</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000366Migrate the "/var/log" path onto a separate file system.Verify that a separate file system/partition has been created for "/var/log" with the following command: +If a separate entry for "/var" is not in use, this is a finding.SRG-OS-000480-GPOS-00227<GroupDescription></GroupDescription>RHEL-09-231025RHEL 9 must use a separate file system for /var/log.<VulnDiscussion>Placing "/var/log" in its own partition enables better separation between log files and other files in "/var/".</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000366Migrate the "/var/log" path onto a separate file system.Verify that a separate file system/partition has been created for "/var/log" with the following command: $ mount | grep /var/log -UUID=c274f65f-c5b5-4486-b021-bee96feb8b21 /var/log xfs noatime 1 2 +/dev/mapper/rhel-var_log on /var/log type xfs (rw,nosuid,nodev,noexec,relatime,seclabel,attr2,inode64,logbufs=8,logbsize=32k) +Note: Options displayed for mount may differ. -If a separate entry for "/var/log" is not in use, this is a finding.SRG-OS-000341-GPOS-00132<GroupDescription></GroupDescription>RHEL-09-231030RHEL 9 must use a separate file system for the system audit data path.<VulnDiscussion>Placing "/var/log/audit" in its own partition enables better separation between audit files and other system files, and helps ensure that auditing cannot be halted due to the partition running out of space. +If a separate entry for "/var/log" is not in use, this is a finding.SRG-OS-000341-GPOS-00132<GroupDescription></GroupDescription>RHEL-09-231030RHEL 9 must use a separate file system for the system audit data path.<VulnDiscussion>Placing "/var/log/audit" in its own partition enables better separation between audit files and other system files, and helps ensure that auditing cannot be halted due to the partition running out of space. -Satisfies: SRG-OS-000341-GPOS-00132, SRG-OS-000480-GPOS-00227</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000366CCI-001849Migrate the system audit data path onto a separate file system.Verify that a separate file system/partition has been created for the system audit data path with the following command: +Satisfies: SRG-OS-000341-GPOS-00132, SRG-OS-000480-GPOS-00227</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-001849Migrate the system audit data path onto a separate file system.Verify that a separate file system/partition has been created for the system audit data path with the following command: Note: /var/log/audit is used as the example as it is a common location. $ mount | grep /var/log/audit -UUID=2efb2979-45ac-82d7-0ae632d11f51 on /var/log/home type xfs (rw,realtime,seclabel,attr2,inode64) +/dev/mapper/rootvg-varlogaudit on /var/log/audit type xfs (rw,relatime,seclabel,attr2,inode64,logbufs=8,logbsize=32k,noquota) +Note: Options displayed for mount may differ. -If no line is returned, this is a finding.SRG-OS-000480-GPOS-00227<GroupDescription></GroupDescription>RHEL-09-231035RHEL 9 must use a separate file system for /var/tmp.<VulnDiscussion>The "/var/tmp" partition is used as temporary storage by many programs. Placing "/var/tmp" in its own partition enables the setting of more restrictive mount options, which can help protect programs that use it.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000366Migrate the "/var/tmp" path onto a separate file system.Verify that a separate file system/partition has been created for "/var/tmp" with the following command: +If no line is returned, this is a finding.SRG-OS-000480-GPOS-00227<GroupDescription></GroupDescription>RHEL-09-231035RHEL 9 must use a separate file system for /var/tmp.<VulnDiscussion>The "/var/tmp" partition is used as temporary storage by many programs. Placing "/var/tmp" in its own partition enables the setting of more restrictive mount options, which can help protect programs that use it.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000366Migrate the "/var/tmp" path onto a separate file system.Verify that a separate file system/partition has been created for "/var/tmp" with the following command: $ mount | grep /var/tmp -UUID=c274f65f-c5b5-4379-b017-bee96feb7a34 /var/log xfs noatime 1 2 +/dev/mapper/rhel-tmp on /var/tmp type xfs (rw,nosuid,nodev,noexec,relatime,seclabel,attr2,inode64,logbufs=8,logbsize=32k) +Note: Options displayed for mount may differ. -If a separate entry for "/var/tmp" is not in use, this is a finding.SRG-OS-000114-GPOS-00059<GroupDescription></GroupDescription>RHEL-09-231040RHEL 9 file system automount function must be disabled unless required.<VulnDiscussion>An authentication process resists replay attacks if it is impractical to achieve a successful authentication by recording and replaying a previous authentication message. +If a separate entry for "/var/tmp" is not in use, this is a finding.SRG-OS-000114-GPOS-00059<GroupDescription></GroupDescription>RHEL-09-231040RHEL 9 file system automount function must be disabled unless required.<VulnDiscussion>An authentication process resists replay attacks if it is impractical to achieve a successful authentication by recording and replaying a previous authentication message. -Satisfies: SRG-OS-000114-GPOS-00059, SRG-OS-000378-GPOS-00163, SRG-OS-000480-GPOS-00227</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000366CCI-000778CCI-001958Configure RHEL 9 to disable the ability to automount devices. +Satisfies: SRG-OS-000114-GPOS-00059, SRG-OS-000378-GPOS-00163, SRG-OS-000480-GPOS-00227</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000778CCI-001958Configure RHEL 9 to disable the ability to automount devices. The autofs service can be disabled with the following command: -$ sudo systemctl mask --now autofs.serviceNote: If the autofs service is not installed, this requirement is not applicable. +$ sudo systemctl mask --now autofs.serviceNote: If the autofs service is not installed, this requirement is Not Applicable. -Verify that RHEL 9 file system automount function has been disabled with the following command: +Verify that the RHEL 9 file system automount function has been disabled with the following command: -$ sudo systemctl is-enabled autofs +$ systemctl is-enabled autofs masked -If the returned value is not "masked", "disabled", or "Failed to get unit file state for autofs.service for autofs", and is not documented as operational requirement with the information system security officer ISSO, this is a finding.SRG-OS-000368-GPOS-00154<GroupDescription></GroupDescription>RHEL-09-231045RHEL 9 must prevent device files from being interpreted on file systems that contain user home directories.<VulnDiscussion>The "nodev" mount option causes the system to not interpret character or block special devices. Executing character or block special devices from untrusted file systems increases the opportunity for nonprivileged users to attain unauthorized administrative access. +If the returned value is not "masked", "disabled", or "Failed to get unit file state for autofs.service for autofs" and is not documented as an operational requirement with the information system security officer (ISSO), this is a finding.SRG-OS-000368-GPOS-00154<GroupDescription></GroupDescription>RHEL-09-231045RHEL 9 must prevent device files from being interpreted on file systems that contain user home directories.<VulnDiscussion>The "nodev" mount option causes the system to not interpret character or block special devices. Executing character or block special devices from untrusted file systems increases the opportunity for nonprivileged users to attain unauthorized administrative access. -The only legitimate location for device files is the "/dev" directory located on the root partition, with the exception of chroot jails if implemented.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-001764Modify "/etc/fstab" to use the "nodev" option on the "/home" directory.Verify "/home" is mounted with the "nodev" option with the following command: +The only legitimate location for device files is the "/dev" directory located on the root partition, with the exception of chroot jails if implemented.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-001764Modify "/etc/fstab" to use the "nodev" option on the "/home" directory.Verify "/home" is mounted with the "nodev" option with the following command: Note: If a separate file system has not been created for the user home directories (user home directories are mounted under "/"), this is automatically a finding, as the "nodev" option cannot be used on the "/" system. $ mount | grep /home -tmpfs on /home type tmpfs (rw,nodev,nosuid,noexec,seclabel) +tmpfs on /home type xfs (rw,nodev,nosuid,noexec,seclabel) -If the "/home" file system is mounted without the "nodev" option, this is a finding.SRG-OS-000368-GPOS-00154<GroupDescription></GroupDescription>RHEL-09-231050RHEL 9 must prevent files with the setuid and setgid bit set from being executed on file systems that contain user home directories.<VulnDiscussion>The "nosuid" mount option causes the system to not execute "setuid" and "setgid" files with owner privileges. This option must be used for mounting any file system not containing approved "setuid" and "setguid" files. Executing files from untrusted file systems increases the opportunity for nonprivileged users to attain unauthorized administrative access. +If the "/home" file system is mounted without the "nodev" option, this is a finding.SRG-OS-000368-GPOS-00154<GroupDescription></GroupDescription>RHEL-09-231050RHEL 9 must prevent files with the setuid and setgid bit set from being executed on file systems that contain user home directories.<VulnDiscussion>The "nosuid" mount option causes the system to not execute "setuid" and "setgid" files with owner privileges. This option must be used for mounting any file system not containing approved "setuid" and "setguid" files. Executing files from untrusted file systems increases the opportunity for nonprivileged users to attain unauthorized administrative access. -Satisfies: SRG-OS-000368-GPOS-00154, SRG-OS-000480-GPOS-00227</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000366CCI-001764Modify "/etc/fstab" to use the "nosuid" option on the "/home" directory.Verify "/home" is mounted with the "nosuid" option with the following command: +Satisfies: SRG-OS-000368-GPOS-00154, SRG-OS-000480-GPOS-00227</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-001764Modify "/etc/fstab" to use the "nosuid" option on the "/home" directory.Verify "/home" is mounted with the "nosuid" option with the following command: Note: If a separate file system has not been created for the user home directories (user home directories are mounted under "/"), this is automatically a finding, as the "nosuid" option cannot be used on the "/" system. $ mount | grep /home -tmpfs on /home type tmpfs (rw,nodev,nosuid,noexec,seclabel) +tmpfs on /home type xfs (rw,nodev,nosuid,noexec,seclabel) If the "/home" file system is mounted without the "nosuid" option, this is a finding.SRG-OS-000480-GPOS-00227<GroupDescription></GroupDescription>RHEL-09-231055RHEL 9 must prevent code from being executed on file systems that contain user home directories.<VulnDiscussion>The "noexec" mount option causes the system to not execute binary files. This option must be used for mounting any file system not containing approved binary files, as they may be incompatible. Executing files from untrusted file systems increases the opportunity for nonprivileged users to attain unauthorized administrative access.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000366Modify "/etc/fstab" to use the "noexec" option on the "/home" directory.Verify "/home" is mounted with the "noexec" option with the following command: @@ -1123,27 +1147,27 @@ $ mount | grep /home tmpfs on /home type xfs (rw,nodev,nosuid,noexec,seclabel) -If the "/home" file system is mounted without the "noexec" option, this is a finding.SRG-OS-000480-GPOS-00227<GroupDescription></GroupDescription>RHEL-09-231065RHEL 9 must prevent special devices on file systems that are imported via Network File System (NFS).<VulnDiscussion>The "nodev" mount option causes the system to not interpret character or block special devices. Executing character or block special devices from untrusted file systems increases the opportunity for nonprivileged users to attain unauthorized administrative access.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000366Update each NFS mounted file system to use the "nodev" option on file systems that are being imported via NFS.Verify RHEL 9 has the "nodev" option configured for all NFS mounts with the following command: +If the "/home" file system is mounted without the "noexec" option, this is a finding.SRG-OS-000480-GPOS-00227<GroupDescription></GroupDescription>RHEL-09-231065RHEL 9 must prevent special devices on file systems that are imported via Network File System (NFS).<VulnDiscussion>The "nodev" mount option causes the system to not interpret character or block special devices. Executing character or block special devices from untrusted file systems increases the opportunity for nonprivileged users to attain unauthorized administrative access.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000366Update each NFS mounted file system to use the "nodev" option on file systems that are being imported via NFS.Note: If no NFS mounts are configured, this requirement is Not Applicable. + +Verify RHEL 9 has the "nodev" option configured for all NFS mounts with the following command: -$ cat /etc/fstab | grep nfs +$ grep nfs /etc/fstab 192.168.22.2:/mnt/export /data nfs4 rw,nosuid,nodev,noexec,sync,soft,sec=krb5:krb5i:krb5p -Note: If no NFS mounts are configured, this requirement is Not Applicable. +If the system is mounting file systems via NFS and the "nodev" option is missing, this is a finding.SRG-OS-000480-GPOS-00227<GroupDescription></GroupDescription>RHEL-09-231070RHEL 9 must prevent code from being executed on file systems that are imported via Network File System (NFS).<VulnDiscussion>The "noexec" mount option causes the system not to execute binary files. This option must be used for mounting any file system not containing approved binary as they may be incompatible. Executing files from untrusted file systems increases the opportunity for nonprivileged users to attain unauthorized administrative access.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000366Update each NFS mounted file system to use the "noexec" option on file systems that are being imported via NFS.Note: If no NFS mounts are configured, this requirement is Not Applicable. -If the system is mounting file systems via NFS and the "nodev" option is missing, this is a finding.SRG-OS-000480-GPOS-00227<GroupDescription></GroupDescription>RHEL-09-231070RHEL 9 must prevent code from being executed on file systems that are imported via Network File System (NFS).<VulnDiscussion>The "noexec" mount option causes the system not to execute binary files. This option must be used for mounting any file system not containing approved binary as they may be incompatible. Executing files from untrusted file systems increases the opportunity for nonprivileged users to attain unauthorized administrative access.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000366Update each NFS mounted file system to use the "noexec" option on file systems that are being imported via NFS.Verify RHEL 9 has the "noexec" option configured for all NFS mounts with the following command: +Verify RHEL 9 has the "noexec" option configured for all NFS mounts with the following command: -$ cat /etc/fstab | grep nfs +$ grep nfs /etc/fstab 192.168.22.2:/mnt/export /data nfs4 rw,nosuid,nodev,noexec,sync,soft,sec=krb5:krb5i:krb5p -If no NFS mounts are configured, this requirement is Not Applicable. +If the system is mounting file systems via NFS and the "noexec" option is missing, this is a finding.SRG-OS-000480-GPOS-00227<GroupDescription></GroupDescription>RHEL-09-231075RHEL 9 must prevent files with the setuid and setgid bit set from being executed on file systems that are imported via Network File System (NFS).<VulnDiscussion>The "nosuid" mount option causes the system not to execute "setuid" and "setgid" files with owner privileges. This option must be used for mounting any file system not containing approved "setuid" and "setguid" files. Executing files from untrusted file systems increases the opportunity for nonprivileged users to attain unauthorized administrative access.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000366Update each NFS mounted file system to use the "nosuid" option on file systems that are being imported via NFS.Note: If no NFS mounts are configured, this requirement is Not Applicable. -If the system is mounting file systems via NFS and the "noexec" option is missing, this is a finding.SRG-OS-000480-GPOS-00227<GroupDescription></GroupDescription>RHEL-09-231075RHEL 9 must prevent files with the setuid and setgid bit set from being executed on file systems that are imported via Network File System (NFS).<VulnDiscussion>The "nosuid" mount option causes the system not to execute "setuid" and "setgid" files with owner privileges. This option must be used for mounting any file system not containing approved "setuid" and "setguid" files. Executing files from untrusted file systems increases the opportunity for nonprivileged users to attain unauthorized administrative access.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000366Update each NFS mounted file system to use the "nosuid" option on file systems that are being imported via NFS.Verify RHEL 9 has the "nosuid" option configured for all NFS mounts with the following command: +Verify RHEL 9 has the "nosuid" option configured for all NFS mounts with the following command: -Note: If no NFS mounts are configured, this requirement is Not Applicable. - -$ cat /etc/fstab | grep nfs +$ grep nfs /etc/fstab 192.168.22.2:/mnt/export /data nfs4 rw,nosuid,nodev,noexec,sync,soft,sec=krb5:krb5i:krb5p @@ -1165,23 +1189,23 @@ $ more /etc/fstab UUID=2bc871e4-e2a3-4f29-9ece-3be60c835222 /mnt/usbflash vfat noauto,owner,ro,nosuid,nodev,noexec 0 0 -If a file system found in "/etc/fstab" refers to removable media and it does not have the "nosuid" option set, this is a finding.SRG-OS-000368-GPOS-00154<GroupDescription></GroupDescription>RHEL-09-231095RHEL 9 must mount /boot with the nodev option.<VulnDiscussion>The only legitimate location for device files is the "/dev" directory located on the root partition. The only exception to this is chroot jails.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-001764Modify "/etc/fstab" to use the "nodev" option on the "/boot" directory.Verify that the "/boot" mount point has the "nodev" option is with the following command: - -$ sudo mount | grep '\s/boot\s' +If a file system found in "/etc/fstab" refers to removable media and it does not have the "nosuid" option set, this is a finding.SRG-OS-000368-GPOS-00154<GroupDescription></GroupDescription>RHEL-09-231095RHEL 9 must mount /boot with the nodev option.<VulnDiscussion>The only legitimate location for device files is the "/dev" directory located on the root partition. The only exception to this is chroot jails.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-001764Modify "/etc/fstab" to use the "nodev" option on the "/boot" directory.Verify that the "/boot" mount point has the "nodev" option with the following command: + +$ mount | grep '\s/boot\s' /dev/sda1 on /boot type xfs (rw,nodev,relatime,seclabel,attr2) -If the "/boot" file system does not have the "nodev" option set, this is a finding.SRG-OS-000368-GPOS-00154<GroupDescription></GroupDescription>RHEL-09-231100RHEL 9 must prevent files with the setuid and setgid bit set from being executed on the /boot directory.<VulnDiscussion>The "nosuid" mount option causes the system not to execute "setuid" and "setgid" files with owner privileges. This option must be used for mounting any file system not containing approved "setuid" and "setguid" files. Executing files from untrusted file systems increases the opportunity for nonprivileged users to attain unauthorized administrative access. +If the "/boot" file system does not have the "nodev" option set, this is a finding.SRG-OS-000368-GPOS-00154<GroupDescription></GroupDescription>RHEL-09-231100RHEL 9 must prevent files with the setuid and setgid bit set from being executed on the /boot directory.<VulnDiscussion>The "nosuid" mount option causes the system not to execute "setuid" and "setgid" files with owner privileges. This option must be used for mounting any file system not containing approved "setuid" and "setguid" files. Executing files from untrusted file systems increases the opportunity for nonprivileged users to attain unauthorized administrative access. -Satisfies: SRG-OS-000368-GPOS-00154, SRG-OS-000480-GPOS-00227</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000366CCI-001764Modify "/etc/fstab" to use the "nosuid" option on the "/boot" directory.Verify the /boot directory is mounted with the "nosuid" option with the following command: +Satisfies: SRG-OS-000368-GPOS-00154, SRG-OS-000480-GPOS-00227</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-001764Modify "/etc/fstab" to use the "nosuid" option on the "/boot" directory.Verify the /boot directory is mounted with the "nosuid" option with the following command: $ mount | grep '\s/boot\s' /dev/sda1 on /boot type xfs (rw,nosuid,relatime,seclabe,attr2,inode64,noquota) -If the /boot file system does not have the "nosuid" option set, this is a finding.SRG-OS-000368-GPOS-00154<GroupDescription></GroupDescription>RHEL-09-231105RHEL 9 must prevent files with the setuid and setgid bit set from being executed on the /boot/efi directory.<VulnDiscussion>The "nosuid" mount option causes the system not to execute "setuid" and "setgid" files with owner privileges. This option must be used for mounting any file system not containing approved "setuid" and "setguid" files. Executing files from untrusted file systems increases the opportunity for nonprivileged users to attain unauthorized administrative access. +If the /boot file system does not have the "nosuid" option set, this is a finding.SRG-OS-000368-GPOS-00154<GroupDescription></GroupDescription>RHEL-09-231105RHEL 9 must prevent files with the setuid and setgid bit set from being executed on the /boot/efi directory.<VulnDiscussion>The "nosuid" mount option causes the system not to execute "setuid" and "setgid" files with owner privileges. This option must be used for mounting any file system not containing approved "setuid" and "setguid" files. Executing files from untrusted file systems increases the opportunity for nonprivileged users to attain unauthorized administrative access. -Satisfies: SRG-OS-000368-GPOS-00154, SRG-OS-000480-GPOS-00227</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000366CCI-001764Modify "/etc/fstab" to use the "nosuid" option on the "/boot/efi" directory.Note: For systems that use BIOS, this requirement is Not Applicable. +Satisfies: SRG-OS-000368-GPOS-00154, SRG-OS-000480-GPOS-00227</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-001764Modify "/etc/fstab" to use the "nosuid" option on the "/boot/efi" directory.Note: For systems that use BIOS, this requirement is Not Applicable. Verify the /boot/efi directory is mounted with the "nosuid" option with the following command: @@ -1203,13 +1227,13 @@ $ mount | grep /dev/shm tmpfs on /dev/shm type tmpfs (rw,nodev,nosuid,noexec,seclabel) -If the /dev/shm file system is mounted without the "noexec" option, this is a finding.SRG-OS-000368-GPOS-00154<GroupDescription></GroupDescription>RHEL-09-231120RHEL 9 must mount /dev/shm with the nosuid option.<VulnDiscussion>The "nosuid" mount option causes the system to not execute "setuid" and "setgid" files with owner privileges. This option must be used for mounting any file system not containing approved "setuid" and "setguid" files. Executing files from untrusted file systems increases the opportunity for nonprivileged users to attain unauthorized administrative access.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-001764Modify "/etc/fstab" to use the "nosuid" option on the "/dev/shm" file system.Verify "/dev/shm" is mounted with the "nosuid" option with the following command: +If the /dev/shm file system is mounted without the "noexec" option, this is a finding.SRG-OS-000368-GPOS-00154<GroupDescription></GroupDescription>RHEL-09-231120RHEL 9 must mount /dev/shm with the nosuid option.<VulnDiscussion>The "nosuid" mount option causes the system to not execute "setuid" and "setgid" files with owner privileges. This option must be used for mounting any file system not containing approved "setuid" and "setguid" files. Executing files from untrusted file systems increases the opportunity for nonprivileged users to attain unauthorized administrative access.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-001764Modify "/etc/fstab" to use the "nosuid" option on the "/dev/shm" file system.Verify "/dev/shm" is mounted with the "nosuid" option with the following command: $ mount | grep /dev/shm tmpfs on /dev/shm type tmpfs (rw,nodev,nosuid,noexec,seclabel) -If the /dev/shm file system is mounted without the "noexec" option, this is a finding.SRG-OS-000368-GPOS-00154<GroupDescription></GroupDescription>RHEL-09-231125RHEL 9 must mount /tmp with the nodev option.<VulnDiscussion>The "nodev" mount option causes the system to not interpret character or block special devices. Executing character or block special devices from untrusted file systems increases the opportunity for nonprivileged users to attain unauthorized administrative access. +If the /dev/shm file system is mounted without the "nosuid" option, this is a finding.SRG-OS-000368-GPOS-00154<GroupDescription></GroupDescription>RHEL-09-231125RHEL 9 must mount /tmp with the nodev option.<VulnDiscussion>The "nodev" mount option causes the system to not interpret character or block special devices. Executing character or block special devices from untrusted file systems increases the opportunity for nonprivileged users to attain unauthorized administrative access. The only legitimate location for device files is the "/dev" directory located on the root partition, with the exception of chroot jails if implemented.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-001764Modify "/etc/fstab" to use the "nodev" option on the "/tmp" directory.Verify "/tmp" is mounted with the "nodev" option: @@ -1297,40 +1321,69 @@ $ mount | grep /var/tmp /dev/mapper/rhel-var-tmp on /var/tmp type xfs (rw,nodev,nosuid,noexec,seclabel) -If the "/var/tmp" file system is mounted without the "nosuid" option, this is a finding.SRG-OS-000405-GPOS-00184<GroupDescription></GroupDescription>RHEL-09-231190RHEL 9 local disk partitions must implement cryptographic mechanisms to prevent unauthorized disclosure or modification of all information that requires at rest protection.<VulnDiscussion>RHEL 9 systems handling data requiring "data at rest" protections must employ cryptographic mechanisms to prevent unauthorized disclosure and modification of the information at rest. - -Selection of a cryptographic mechanism is based on the need to protect the integrity of organizational information. The strength of the mechanism is commensurate with the security category and/or classification of the information. Organizations have the flexibility to either encrypt all information on storage devices (i.e., full disk encryption) or encrypt specific data structures (e.g., files, records, or fields). - +If the "/var/tmp" file system is mounted without the "nosuid" option, this is a finding.SRG-OS-000405-GPOS-00184<GroupDescription></GroupDescription>RHEL-09-231190RHEL 9 local disk partitions must implement cryptographic mechanisms to prevent unauthorized disclosure or modification of all information that requires at rest protection.<VulnDiscussion>RHEL 9 systems handling data requiring "data at rest" protections must employ cryptographic mechanisms to prevent unauthorized disclosure and modification of the information at rest. + +Selection of a cryptographic mechanism is based on the need to protect the integrity of organizational information. The strength of the mechanism is commensurate with the security category and/or classification of the information. Organizations have the flexibility to either encrypt all information on storage devices (i.e., full disk encryption) or encrypt specific data structures (e.g., files, records, or fields). + Satisfies: SRG-OS-000405-GPOS-00184, SRG-OS-000185-GPOS-00079, SRG-OS-000404-GPOS-00183</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-001199CCI-002475CCI-002476Configure RHEL 9 to prevent unauthorized modification of all information at rest by using disk encryption. Encrypting a partition in an already installed system is more difficult, because existing partitions will need to be resized and changed. -To encrypt an entire partition, dedicate a partition for encryption in the partition layout.Note: If there is a documented and approved reason for not having data-at-rest encryption at the operating system level, such as encryption provided by a hypervisor or a disk storage array in a virtualized environment, this requirement is not applicable. - -Verify RHEL 9 prevents unauthorized disclosure or modification of all information requiring at-rest protection by using disk encryption. - -Note: If there is a documented and approved reason for not having data-at-rest encryption, this requirement is Not Applicable. - -Verify all system partitions are encrypted with the following command: - -$ blkid - -/dev/map per/rhel-root: UUID="67b7d7fe-de60-6fd0-befb-e6748cf97743" TYPE="crypto_LUKS" - -Every persistent disk partition present must be of type "crypto_LUKS". If any partitions other than the boot partition or pseudo file systems (such as /proc or /sys) or temporary file systems (that are tmpfs) are not type "crypto_LUKS", ask the administrator to indicate how the partitions are encrypted. If there is no evidence that these partitions are encrypted, this is a finding.SRG-OS-000095-GPOS-00049<GroupDescription></GroupDescription>RHEL-09-231195RHEL 9 must disable mounting of cramfs.<VulnDiscussion>It is detrimental for operating systems to provide, or install by default, functionality exceeding requirements or mission objectives. These unnecessary capabilities or services are often overlooked and therefore may remain unsecured. They increase the risk to the platform by providing additional attack vectors. +To encrypt an entire partition, dedicate a partition for encryption in the partition layout.Note: If there is a documented and approved reason for not having data-at-rest encryption at the operating system level, such as encryption provided by a hypervisor or a disk storage array in a virtualized environment, this requirement is Not Applicable. + +Verify RHEL 9 prevents unauthorized disclosure or modification of all information requiring at-rest protection by using disk encryption. + +Note: If there is a documented and approved reason for not having data-at-rest encryption, this requirement is Not Applicable. + +List all block devices in tree-like format: + +$ sudo lsblk --tree + +NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINTS +zram0 252:0 0 8G 0 disk [SWAP] +nvme0n1 259:0 0 476.9G 0 disk +|-nvme0n1p1 259:1 0 1G 0 part /boot/efi +|-nvme0n1p2 259:2 0 1G 0 part /boot +|-nvme0n1p3 259:3 0 474.9G 0 part + |-luks-<encrypted_id> 253:0 0 474.9G 0 crypt + |-rhel-root 253:1 0 16G 0 lvm / + |-rhel-varcache 253:2 0 8G 0 lvm /var/cache + |-rhel-vartmp 253:3 0 4G 0 lvm /var/tmp + |-rhel-varlog 253:4 0 4G 0 lvm /var/log + |-rhel-home 253:5 0 64G 0 lvm /home + |-rhel-varlogaudit 253:6 0 4G 0 lvm /var/log/audit + +Verify that the block device tree for each persistent filesystem, excluding the /boot and /boot/efi filesystems, has at least one parent block device of type "crypt", and that the encryption type is LUKS: + +$ sudo cryptsetup status luks-b74f6910-2547-4399-86b2-8b0252d926d7 +/dev/mapper/luks-b74f6910-2547-4399-86b2-8b0252d926d7 is active and is in use. + type: LUKS2 + cipher: aes-xts-plain64 + keysize: 512 bits + key location: keyring + device: /dev/nvme0n1p3 + sector size: 512 + offset: 32768 sectors + size: 995986063 sectors + mode: read/write + +If there are persistent filesystems (other than /boot or /boot/efi) whose block device trees do not have a crypt block device of type LUKS, ask the administrator to indicate how persistent filesystems are encrypted. + +If there is no evidence that persistent filesystems are encrypted, this is a finding.SRG-OS-000095-GPOS-00049<GroupDescription></GroupDescription>RHEL-09-231195RHEL 9 must disable mounting of cramfs.<VulnDiscussion>It is detrimental for operating systems to provide, or install by default, functionality exceeding requirements or mission objectives. These unnecessary capabilities or services are often overlooked and therefore may remain unsecured. They increase the risk to the platform by providing additional attack vectors. Removing support for unneeded filesystem types reduces the local attack surface of the server. -Compressed ROM/RAM file system (or cramfs) is a read-only file system designed for simplicity and space-efficiency. It is mainly used in embedded and small-footprint systems.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000381To configure the system to prevent the cramfs kernel module from being loaded, add the following line to the file /etc/modprobe.d/blacklist.conf (or create blacklist.conf if it does not exist): +Compressed ROM/RAM file system (or cramfs) is a read-only file system designed for simplicity and space-efficiency. It is mainly used in embedded and small-footprint systems.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000381To configure the system to prevent the cramfs kernel module from being loaded, add the following lines to the file /etc/modprobe.d/blacklist.conf (or create blacklist.conf if it does not exist): install cramfs /bin/false -blacklist cramfsVerify that RHEL 9 disables the ability to load the cramfs kernel module with the following command: +blacklist cramfsVerify that RHEL 9 disables the ability to load the cramfs kernel module with the following command: -$ sudo grep -r cramfs /etc/modprobe.conf /etc/modprobe.d/* +$ grep -r cramfs /etc/modprobe.conf /etc/modprobe.d/* +install cramfs /bin/false blacklist cramfs -If the command does not return any output, or the line is commented out, and use of cramfs is not documented with the information system security officer (ISSO) as an operational requirement, this is a finding.SRG-OS-000480-GPOS-00227<GroupDescription></GroupDescription>RHEL-09-231200RHEL 9 must prevent special devices on non-root local partitions.<VulnDiscussion>The "nodev" mount option causes the system to not interpret character or block special devices. Executing character or block special devices from untrusted file systems increases the opportunity for nonprivileged users to attain unauthorized administrative access. +If the command does not return any output or the lines are commented out, and use of cramfs is not documented with the information system security officer (ISSO) as an operational requirement, this is a finding.SRG-OS-000480-GPOS-00227<GroupDescription></GroupDescription>RHEL-09-231200RHEL 9 must prevent special devices on non-root local partitions.<VulnDiscussion>The "nodev" mount option causes the system to not interpret character or block special devices. Executing character or block special devices from untrusted file systems increases the opportunity for nonprivileged users to attain unauthorized administrative access. The only legitimate location for device files is the "/dev" directory located on the root partition, with the exception of chroot jails if implemented.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000366Configure the "/etc/fstab" to use the "nodev" option on all non-root local partitions.Verify all non-root local partitions are mounted with the "nodev" option with the following command: @@ -1364,25 +1417,25 @@ $ sudo chmod 755 [FILE]SRG-OS-000206-GPOS-00084<GroupDescription></GroupDescription>RHEL-09-232025RHEL 9 /var/log directory must have mode 0755 or less permissive.<VulnDiscussion>Only authorized personnel should be aware of errors and the details of the errors. Error messages are an indicator of an organization's operational state or can identify the RHEL 9 system or platform. Additionally, personally identifiable information (PII) and operational information must not be revealed through error messages to unauthorized personnel or their designated representatives. +If any system-wide shared library file is found to be group-writable or world-writable, this is a finding.SRG-OS-000206-GPOS-00084<GroupDescription></GroupDescription>RHEL-09-232025RHEL 9 /var/log directory must have mode 0755 or less permissive.<VulnDiscussion>Only authorized personnel should be aware of errors and the details of the errors. Error messages are an indicator of an organization's operational state or can identify the RHEL 9 system or platform. Additionally, personally identifiable information (PII) and operational information must not be revealed through error messages to unauthorized personnel or their designated representatives. The structure and content of error messages must be carefully considered by the organization and development team. The extent to which the information system is able to identify and handle error conditions is guided by organizational policy and operational requirements.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-001314Configure the "/var/log" directory to a mode of "0755" by running the following command: -$ sudo chmod 0755 /var/logVerify that the "/var/log" directory has a mode of "0755" or less permissive with the following command: +$ sudo chmod 0755 /var/logVerify that the "/var/log" directory has a mode of "0755" or less permissive with the following command: -$ ls -ld /var/log +$ stat -c '%a %n' /var/log -drwxr-xr-x. 16 root root 4096 July 11 11:34 /var/log +755 /var/log -If "/var/log" does not have a mode of "0755" or less permissive, this is a finding.SRG-OS-000206-GPOS-00084<GroupDescription></GroupDescription>RHEL-09-232030RHEL 9 /var/log/messages file must have mode 0640 or less permissive.<VulnDiscussion>Only authorized personnel should be aware of errors and the details of the errors. Error messages are an indicator of an organization's operational state or can identify the RHEL 9 system or platform. Additionally, personally identifiable information (PII) and operational information must not be revealed through error messages to unauthorized personnel or their designated representatives. +If "/var/log" does not have a mode of "0755" or less permissive, this is a finding.SRG-OS-000206-GPOS-00084<GroupDescription></GroupDescription>RHEL-09-232030RHEL 9 /var/log/messages file must have mode 0640 or less permissive.<VulnDiscussion>Only authorized personnel should be aware of errors and the details of the errors. Error messages are an indicator of an organization's operational state or can identify the RHEL 9 system or platform. Additionally, personally identifiable information (PII) and operational information must not be revealed through error messages to unauthorized personnel or their designated representatives. The structure and content of error messages must be carefully considered by the organization and development team. The extent to which the information system is able to identify and handle error conditions is guided by organizational policy and operational requirements.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-001314Configure the "/var/log/messages" file to have a mode of "0640" by running the following command: -$ sudo chmod 0640 /var/log/messagesVerify the "/var/log/messages" file has a mode of "0640" or less permissive with the following command: +$ sudo chmod 0640 /var/log/messagesVerify the "/var/log/messages" file has a mode of "0640" or less permissive with the following command: -$ ls -la /var/log/messages +$ stat -c '%a %n' /var/log/messages -rw-------. 1 root root 564223 July 11 11:34 /var/log/messages +600 /var/log/messages If "/var/log/messages" does not have a mode of "0640" or less permissive, this is a finding.SRG-OS-000256-GPOS-00097<GroupDescription></GroupDescription>RHEL-09-232035RHEL 9 audit tools must have a mode of 0755 or less permissive.<VulnDiscussion>Protecting audit information also includes identifying and protecting the tools used to view and manipulate log data. Therefore, protecting audit tools is necessary to prevent unauthorized operation on audit information. @@ -1404,11 +1457,11 @@ $ stat -c "%a %n" /sbin/auditctl /sbin/aureport /sbin/ausearch /sbin/autrace /sb 755 /sbin/rsyslogd 755 /sbin/augenrules -If any of the audit tool files have a mode more permissive than "0755", this is a finding.SRG-OS-000480-GPOS-00227<GroupDescription></GroupDescription>RHEL-09-232040RHEL 9 cron configuration directories must have a mode of 0700 or less permissive.<VulnDiscussion>Service configuration files enable or disable features of their respective services that if configured incorrectly can lead to insecure and vulnerable configurations. Therefore, service configuration files should have the correct access rights to prevent unauthorized changes.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000366Configure any RHEL 9 cron configuration directory with a mode more permissive than "0700" as follows: +If any of the audit tool files have a mode more permissive than "0755", this is a finding.SRG-OS-000480-GPOS-00227<GroupDescription></GroupDescription>RHEL-09-232040RHEL 9 cron configuration directories must have a mode of 0700 or less permissive.<VulnDiscussion>Service configuration files enable or disable features of their respective services that if configured incorrectly can lead to insecure and vulnerable configurations. Therefore, service configuration files should have the correct access rights to prevent unauthorized changes.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000366Configure any RHEL 9 cron configuration directory with a mode more permissive than "0700" as follows: -chmod 0700 [cron configuration directory]Verify the permissions of the cron directories with the following command: +chmod 0700 [cron configuration directory]Verify the permissions of the cron directories with the following command: -$ find /etc/cron* -type d | xargs stat -c "%a %n" +$ find /etc/cron* -maxdepth 0 -type d | xargs stat -c "%a %n" 700 /etc/cron.d 700 /etc/cron.daily @@ -1416,31 +1469,29 @@ $ find /etc/cron* -type d | xargs stat -c "%a %n" 700 /etc/cron.monthly 700 /etc/cron.weekly -If any cron configuration directory is more permissive than "700", this is a finding.SRG-OS-000480-GPOS-00227<GroupDescription></GroupDescription>RHEL-09-232045All RHEL 9 local initialization files must have mode 0740 or less permissive.<VulnDiscussion>Local initialization files are used to configure the user's shell environment upon logon. Malicious modification of these files could compromise accounts upon logon.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000366Set the mode of the local initialization files to "0740" with the following command: +If any cron configuration directory is more permissive than "700", this is a finding.SRG-OS-000480-GPOS-00227<GroupDescription></GroupDescription>RHEL-09-232045All RHEL 9 local initialization files must have mode 0740 or less permissive.<VulnDiscussion>Local initialization files are used to configure the user's shell environment upon logon. Malicious modification of these files could compromise accounts upon logon.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000366Set the mode of the local initialization files to "0740" with the following command: Note: The example will be for the wadea user, who has a home directory of "/home/wadea". -$ sudo chmod 0740 /home/wadea/.<INIT_FILE>Verify that all local initialization files have a mode of "0740" or less permissive with the following command: - -Note: The example will be for the "wadea" user, who has a home directory of "/home/wadea". +$ sudo chmod 0740 /home/wadea/.<INIT_FILE>Verify that all local initialization files have a mode of "0740" or less permissive with the following command: + +Note: The example will be for the "bingwa" user, who has a home directory of "/home/bingwa". + +$ find /home/bingwa/.[^.]* -maxdepth 0 -perm -740 -exec stat -c "%a %n" {} \; | more -$ sudo ls -al /home/wadea/.[^.]* | more - --rwxr-xr-x 1 wadea users 896 Mar 10 2011 .profile --rwxr-xr-x 1 wadea users 497 Jan 6 2007 .login --rwxr-xr-x 1 wadea users 886 Jan 6 2007 .something - -If any local initialization files have a mode more permissive than "0740", this is a finding.SRG-OS-000480-GPOS-00227<GroupDescription></GroupDescription>RHEL-09-232050All RHEL 9 local interactive user home directories must have mode 0750 or less permissive.<VulnDiscussion>Excessive permissions on local interactive user home directories may allow unauthorized access to user files by other users.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000366Change the mode of interactive user's home directories to "0750". To change the mode of a local interactive user's home directory, use the following command: +755 /home/bingwa/.somepermissivefile + +If any local initialization files are returned, this indicates a mode more permissive than "0740", and this is a finding.SRG-OS-000480-GPOS-00227<GroupDescription></GroupDescription>RHEL-09-232050All RHEL 9 local interactive user home directories must have mode 0750 or less permissive.<VulnDiscussion>Excessive permissions on local interactive user home directories may allow unauthorized access to user files by other users.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000366Change the mode of interactive user's home directories to "0750". To change the mode of a local interactive user's home directory, use the following command: Note: The example will be for the user "wadea". -$ sudo chmod 0750 /home/wadeaVerify the assigned home directory of all local interactive users has a mode of "0750" or less permissive with the following command: +$ sudo chmod 0750 /home/wadeaVerify the assigned home directory of all local interactive users has a mode of "0750" or less permissive with the following command: Note: This may miss interactive users that have been assigned a privileged user identifier (UID). Evidence of interactive use may be obtained from a number of log files containing system logon information. -$ sudo ls -ld $(awk -F: '($3>=1000)&&($7 !~ /nologin/){print $6}' /etc/passwd) +$ stat -L -c '%a %n' $(awk -F: '($3>=1000)&&($7 !~ /nologin/){print $6}' /etc/passwd) 2>/dev/null -drwxr-x--- 2 wadea admin 4096 Jun 5 12:41 wadea +700 /home/bingwa If home directories referenced in "/etc/passwd" do not have a mode of "0750" or less permissive, this is a finding.SRG-OS-000480-GPOS-00227<GroupDescription></GroupDescription>RHEL-09-232055RHEL 9 /etc/group file must have mode 0644 or less permissive to prevent unauthorized access.<VulnDiscussion>The "/etc/group" file contains information regarding groups that are configured on the system. Protection of this file is important for system security.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000366Change the mode of the file "/etc/group" to "0644" by running the following command: @@ -1626,107 +1677,107 @@ $ sudo stat -c "%G %n" /etc/shadow- root /etc/shadow- -If "/etc/shadow-" file does not have a group owner of "root", this is a finding.SRG-OS-000206-GPOS-00084<GroupDescription></GroupDescription>RHEL-09-232170RHEL 9 /var/log directory must be owned by root.<VulnDiscussion>Only authorized personnel should be aware of errors and the details of the errors. Error messages are an indicator of an organization's operational state or can identify the RHEL 9 system or platform. Additionally, personally identifiable information (PII) and operational information must not be revealed through error messages to unauthorized personnel or their designated representatives. +If "/etc/shadow-" file does not have a group owner of "root", this is a finding.SRG-OS-000206-GPOS-00084<GroupDescription></GroupDescription>RHEL-09-232170RHEL 9 /var/log directory must be owned by root.<VulnDiscussion>Only authorized personnel should be aware of errors and the details of the errors. Error messages are an indicator of an organization's operational state or can identify the RHEL 9 system or platform. Additionally, personally identifiable information (PII) and operational information must not be revealed through error messages to unauthorized personnel or their designated representatives. The structure and content of error messages must be carefully considered by the organization and development team. The extent to which the information system is able to identify and handle error conditions is guided by organizational policy and operational requirements.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-001314Configure the owner of the directory "/var/log" to "root" by running the following command: -$ sudo chown root /var/logVerify the "/var/log" directory is owned by root with the following command: +$ sudo chown root /var/logVerify the "/var/log" directory is owned by root with the following command: -$ ls -ld /var/log +$ stat -c "%U %n" /var/log -drwxr-xr-x. 16 root root 4096 July 11 11:34 /var/log +root /var/log -If "/var/log" does not have an owner of "root", this is a finding.SRG-OS-000206-GPOS-00084<GroupDescription></GroupDescription>RHEL-09-232175RHEL 9 /var/log directory must be group-owned by root.<VulnDiscussion>Only authorized personnel should be aware of errors and the details of the errors. Error messages are an indicator of an organization's operational state or can identify the RHEL 9 system or platform. Additionally, personally identifiable information (PII) and operational information must not be revealed through error messages to unauthorized personnel or their designated representatives. +If "/var/log" does not have an owner of "root", this is a finding.SRG-OS-000206-GPOS-00084<GroupDescription></GroupDescription>RHEL-09-232175RHEL 9 /var/log directory must be group-owned by root.<VulnDiscussion>Only authorized personnel should be aware of errors and the details of the errors. Error messages are an indicator of an organization's operational state or can identify the RHEL 9 system or platform. Additionally, personally identifiable information (PII) and operational information must not be revealed through error messages to unauthorized personnel or their designated representatives. The structure and content of error messages must be carefully considered by the organization and development team. The extent to which the information system is able to identify and handle error conditions is guided by organizational policy and operational requirements.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-001314Configure the group owner of the directory "/var/log" to "root" by running the following command: -$ sudo chgrp root /var/logVerify the "/var/log" directory is group-owned by root with the following command: +$ sudo chgrp root /var/logVerify the "/var/log" directory is group-owned by root with the following command: -$ ls -ld /var/log +$ stat -c "%G %n" /var/log -drwxr-xr-x. 16 root root 4096 July 11 11:34 /var/log +root /var/log -If "/var/log" does not have a group owner of "root", this is a finding.SRG-OS-000206-GPOS-00084<GroupDescription></GroupDescription>RHEL-09-232180RHEL 9 /var/log/messages file must be owned by root.<VulnDiscussion>Only authorized personnel should be aware of errors and the details of the errors. Error messages are an indicator of an organization's operational state or can identify the RHEL 9 system or platform. Additionally, personally identifiable information (PII) and operational information must not be revealed through error messages to unauthorized personnel or their designated representatives. +If "/var/log" does not have a group owner of "root", this is a finding.SRG-OS-000206-GPOS-00084<GroupDescription></GroupDescription>RHEL-09-232180RHEL 9 /var/log/messages file must be owned by root.<VulnDiscussion>Only authorized personnel should be aware of errors and the details of the errors. Error messages are an indicator of an organization's operational state or can identify the RHEL 9 system or platform. Additionally, personally identifiable information (PII) and operational information must not be revealed through error messages to unauthorized personnel or their designated representatives. The structure and content of error messages must be carefully considered by the organization and development team. The extent to which the information system is able to identify and handle error conditions is guided by organizational policy and operational requirements.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-001314Change the owner of the "/var/log/messages" file to "root" by running the following command: -$ sudo chown root /var/log/messagesVerify the "/var/log/messages" file is owned by root with the following command: - -$ ls -la /var/log/messages - -rw-------. 1 root root 564223 July 11 11:34 /var/log/messages - -If "/var/log/messages" does not have an owner of "root", this is a finding.SRG-OS-000206-GPOS-00084<GroupDescription></GroupDescription>RHEL-09-232185RHEL 9 /var/log/messages file must be group-owned by root.<VulnDiscussion>Only authorized personnel should be aware of errors and the details of the errors. Error messages are an indicator of an organization's operational state or can identify the RHEL 9 system or platform. Additionally, personally identifiable information (PII) and operational information must not be revealed through error messages to unauthorized personnel or their designated representatives. +$ sudo chown root /var/log/messagesVerify the "/var/log/messages" file is owned by root with the following command: + +$ stat -c "%U %n" /var/log/messages + +root /var/log + +If "/var/log/messages" does not have an owner of "root", this is a finding.SRG-OS-000206-GPOS-00084<GroupDescription></GroupDescription>RHEL-09-232185RHEL 9 /var/log/messages file must be group-owned by root.<VulnDiscussion>Only authorized personnel should be aware of errors and the details of the errors. Error messages are an indicator of an organization's operational state or can identify the RHEL 9 system or platform. Additionally, personally identifiable information (PII) and operational information must not be revealed through error messages to unauthorized personnel or their designated representatives. The structure and content of error messages must be carefully considered by the organization and development team. The extent to which the information system is able to identify and handle error conditions is guided by organizational policy and operational requirements.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-001314Change the group owner of the "/var/log/messages" file to "root" by running the following command: -$ sudo chgrp root /var/log/messagesVerify the "/var/log/messages" file is group-owned by root with the following command: +$ sudo chgrp root /var/log/messagesVerify the "/var/log/messages" file is group-owned by root with the following command: -$ ls -la /var/log/messages +$ stat -c "%G %n" /var/log/messages -rw-------. 1 root root 564223 July 11 11:34 /var/log/messages +root /var/log -If "/var/log/messages" does not have a group owner of "root", this is a finding.SRG-OS-000259-GPOS-00100<GroupDescription></GroupDescription>RHEL-09-232190RHEL 9 system commands must be owned by root.<VulnDiscussion>If RHEL 9 allowed any user to make changes to software libraries, then those changes might be implemented without undergoing the appropriate testing and approvals that are part of a robust change management process. +If "/var/log/messages" does not have a group owner of "root", this is a finding.SRG-OS-000259-GPOS-00100<GroupDescription></GroupDescription>RHEL-09-232190RHEL 9 system commands must be owned by root.<VulnDiscussion>If RHEL 9 allowed any user to make changes to software libraries, then those changes might be implemented without undergoing the appropriate testing and approvals that are part of a robust change management process. This requirement applies to RHEL 9 with software libraries that are accessible and configurable, as in the case of interpreted languages. Software libraries also include privileged programs that execute with escalated privileges.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-001499Configure the system commands to be protected from unauthorized access. Run the following command, replacing "[FILE]" with any system command file not owned by "root". -$ sudo chown root [FILE]Verify the system commands contained in the following directories are owned by "root" with the following command: +$ sudo chown root [FILE]Verify the system commands contained in the following directories are owned by "root" with the following command: -$ sudo find -L /bin /sbin /usr/bin /usr/sbin /usr/libexec /usr/local/bin /usr/local/sbin ! -user root -exec ls -l {} \; +$ sudo find -L /bin /sbin /usr/bin /usr/sbin /usr/libexec /usr/local/bin /usr/local/sbin ! -user root -exec stat -L -c "%U %n" {} \; -If any system commands are found to not be owned by root, this is a finding.SRG-OS-000259-GPOS-00100<GroupDescription></GroupDescription>RHEL-09-232195RHEL 9 system commands must be group-owned by root or a system account.<VulnDiscussion>If RHEL 9 allowed any user to make changes to software libraries, then those changes might be implemented without undergoing the appropriate testing and approvals that are part of a robust change management process. +If any system commands are found to not be owned by root, this is a finding.SRG-OS-000259-GPOS-00100<GroupDescription></GroupDescription>RHEL-09-232195RHEL 9 system commands must be group-owned by root or a system account.<VulnDiscussion>If RHEL 9 allowed any user to make changes to software libraries, then those changes might be implemented without undergoing the appropriate testing and approvals that are part of a robust change management process. This requirement applies to RHEL 9 with software libraries that are accessible and configurable, as in the case of interpreted languages. Software libraries also include privileged programs that execute with escalated privileges.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-001499Configure the system commands to be protected from unauthorized access. Run the following command, replacing "[FILE]" with any system command file not group-owned by "root" or a required system account. -$ sudo chgrp root [FILE]Verify the system commands contained in the following directories are group-owned by "root", or a required system account, with the following command: +$ sudo chgrp root [FILE]Verify the system commands contained in the following directories are group-owned by "root", or a required system account, with the following command: -$ sudo find -L /bin /sbin /usr/bin /usr/sbin /usr/local/bin /usr/local/sbin ! -group root -exec ls -l {} \; +$ sudo find -L /bin /sbin /usr/bin /usr/sbin /usr/libexec /usr/local/bin /usr/local/sbin ! -group root -exec stat -L -c "%G %n" {} \; -If any system commands are returned and is not group-owned by a required system account, this is a finding.SRG-OS-000259-GPOS-00100<GroupDescription></GroupDescription>RHEL-09-232200RHEL 9 library files must be owned by root.<VulnDiscussion>If RHEL 9 allowed any user to make changes to software libraries, then those changes might be implemented without undergoing the appropriate testing and approvals that are part of a robust change management process. +If any system commands are returned and are not group-owned by a required system account, this is a finding.SRG-OS-000259-GPOS-00100<GroupDescription></GroupDescription>RHEL-09-232200RHEL 9 library files must be owned by root.<VulnDiscussion>If RHEL 9 allowed any user to make changes to software libraries, then those changes might be implemented without undergoing the appropriate testing and approvals that are part of a robust change management process. -This requirement applies to RHEL 9 with software libraries that are accessible and configurable, as in the case of interpreted languages. Software libraries also include privileged programs that execute with escalated privileges.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-001499Configure the system-wide shared library files (/lib, /lib64, /usr/lib and /usr/lib64) to be protected from unauthorized access. +This requirement applies to RHEL 9 with software libraries that are accessible and configurable, as in the case of interpreted languages. Software libraries also include privileged programs that execute with escalated privileges.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-001499Configure the systemwide shared library files (/lib, /lib64, /usr/lib and /usr/lib64) to be protected from unauthorized access. Run the following command, replacing "[FILE]" with any library file not owned by "root". -$ sudo chown root [FILE]Verify the system-wide shared library files are owned by "root" with the following command: +$ sudo chown root [FILE]Verify the systemwide shared library files are owned by "root" with the following command: -$ sudo find -L /lib /lib64 /usr/lib /usr/lib64 ! -user root -exec ls -l {} \; +$ sudo find -L /lib /lib64 /usr/lib /usr/lib64 ! -user root -exec stat -L -c "%U %n" {} \; -If any system-wide shared library file is not owned by root, this is a finding.SRG-OS-000259-GPOS-00100<GroupDescription></GroupDescription>RHEL-09-232205RHEL 9 library files must be group-owned by root or a system account.<VulnDiscussion>If RHEL 9 allowed any user to make changes to software libraries, then those changes might be implemented without undergoing the appropriate testing and approvals that are part of a robust change management process. +If any systemwide shared library file is not owned by root, this is a finding.SRG-OS-000259-GPOS-00100<GroupDescription></GroupDescription>RHEL-09-232205RHEL 9 library files must be group-owned by root or a system account.<VulnDiscussion>If RHEL 9 allowed any user to make changes to software libraries, then those changes might be implemented without undergoing the appropriate testing and approvals that are part of a robust change management process. -This requirement applies to RHEL 9 with software libraries that are accessible and configurable, as in the case of interpreted languages. Software libraries also include privileged programs that execute with escalated privileges.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-001499Configure the system-wide shared library files (/lib, /lib64, /usr/lib and /usr/lib64) to be protected from unauthorized access. +This requirement applies to RHEL 9 with software libraries that are accessible and configurable, as in the case of interpreted languages. Software libraries also include privileged programs that execute with escalated privileges.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-001499Configure the systemwide shared library files (/lib, /lib64, /usr/lib and /usr/lib64) to be protected from unauthorized access. Run the following command, replacing "[FILE]" with any library file not group-owned by "root". -$ sudo chgrp root [FILE]Verify the system-wide shared library files are group-owned by "root" with the following command: +$ sudo chgrp root [FILE]Verify the systemwide shared library files are group-owned by "root" with the following command: -$ sudo find -L /lib /lib64 /usr/lib /usr/lib64 ! -group root -exec ls -l {} \; +$ sudo find -L /lib /lib64 /usr/lib /usr/lib64 ! -group root -exec stat -L -c "%G %n" {} \; -If any system-wide shared library file is returned and is not group-owned by a required system account, this is a finding.SRG-OS-000259-GPOS-00100<GroupDescription></GroupDescription>RHEL-09-232210RHEL 9 library directories must be owned by root.<VulnDiscussion>If RHEL 9 allowed any user to make changes to software libraries, then those changes might be implemented without undergoing the appropriate testing and approvals that are part of a robust change management process. +If any systemwide shared library file is returned and is not group-owned by a required system account, this is a finding.SRG-OS-000259-GPOS-00100<GroupDescription></GroupDescription>RHEL-09-232210RHEL 9 library directories must be owned by root.<VulnDiscussion>If RHEL 9 allowed any user to make changes to software libraries, then those changes might be implemented without undergoing the appropriate testing and approvals that are part of a robust change management process. -This requirement applies to RHEL 9 with software libraries that are accessible and configurable, as in the case of interpreted languages. Software libraries also include privileged programs that execute with escalated privileges.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-001499Configure the system-wide shared library directories within (/lib, /lib64, /usr/lib and /usr/lib64) to be protected from unauthorized access. +This requirement applies to RHEL 9 with software libraries that are accessible and configurable, as in the case of interpreted languages. Software libraries also include privileged programs that execute with escalated privileges.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-001499Configure the systemwide shared library directories within (/lib, /lib64, /usr/lib and /usr/lib64) to be protected from unauthorized access. Run the following command, replacing "[DIRECTORY]" with any library directory not owned by "root". -$ sudo chown root [DIRECTORY]Verify the system-wide shared library directories are owned by "root" with the following command: +$ sudo chown root [DIRECTORY]Verify the systemwide shared library directories are owned by "root" with the following command: -$ sudo find /lib /lib64 /usr/lib /usr/lib64 ! -user root -type d -exec stat -c "%n %U" '{}' \; +$ sudo find /lib /lib64 /usr/lib /usr/lib64 ! -user root -type d -exec stat -c "%U %n" {} \; -If any system-wide shared library directory is not owned by root, this is a finding.SRG-OS-000259-GPOS-00100<GroupDescription></GroupDescription>RHEL-09-232215RHEL 9 library directories must be group-owned by root or a system account.<VulnDiscussion>If RHEL 9 allowed any user to make changes to software libraries, then those changes might be implemented without undergoing the appropriate testing and approvals that are part of a robust change management process. +If any systemwide shared library directory is not owned by "root", this is a finding.SRG-OS-000259-GPOS-00100<GroupDescription></GroupDescription>RHEL-09-232215RHEL 9 library directories must be group-owned by root or a system account.<VulnDiscussion>If RHEL 9 allowed any user to make changes to software libraries, then those changes might be implemented without undergoing the appropriate testing and approvals that are part of a robust change management process. -This requirement applies to RHEL 9 with software libraries that are accessible and configurable, as in the case of interpreted languages. Software libraries also include privileged programs that execute with escalated privileges.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-001499Configure the system-wide shared library directories (/lib, /lib64, /usr/lib and /usr/lib64) to be protected from unauthorized access. +This requirement applies to RHEL 9 with software libraries that are accessible and configurable, as in the case of interpreted languages. Software libraries also include privileged programs that execute with escalated privileges.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-001499Configure the systemwide shared library directories (/lib, /lib64, /usr/lib and /usr/lib64) to be protected from unauthorized access. Run the following command, replacing "[DIRECTORY]" with any library directory not group-owned by "root". -$ sudo chgrp root [DIRECTORY]Verify the system-wide shared library directories are group-owned by "root" with the following command: +$ sudo chgrp root [DIRECTORY]Verify the systemwide shared library directories are group-owned by "root" with the following command: -$ sudo find /lib /lib64 /usr/lib /usr/lib64 ! -group root -type d -exec stat -c "%n %G" '{}' \; +$ sudo find /lib /lib64 /usr/lib /usr/lib64 ! -group root -type d -exec stat -c "%G %n" {} \; -If any system-wide shared library directory is returned and is not group-owned by a required system account, this is a finding.SRG-OS-000256-GPOS-00097<GroupDescription></GroupDescription>RHEL-09-232220RHEL 9 audit tools must be owned by root.<VulnDiscussion>Protecting audit information also includes identifying and protecting the tools used to view and manipulate log data. Therefore, protecting audit tools is necessary to prevent unauthorized operation on audit information. +If any systemwide shared library directory is returned and is not group-owned by a required system account, this is a finding.SRG-OS-000256-GPOS-00097<GroupDescription></GroupDescription>RHEL-09-232220RHEL 9 audit tools must be owned by root.<VulnDiscussion>Protecting audit information also includes identifying and protecting the tools used to view and manipulate log data. Therefore, protecting audit tools is necessary to prevent unauthorized operation on audit information. RHEL 9 systems providing tools to interface with audit information will leverage user permissions and roles identifying the user accessing the tools, and the corresponding rights the user enjoys, to make access decisions regarding the access to audit tools. @@ -1794,11 +1845,11 @@ root /etc/cron.monthly root /etc/crontab root /etc/cron.weekly -If any crontab is not group owned by root, this is a finding.SRG-OS-000480-GPOS-00227<GroupDescription></GroupDescription>RHEL-09-232240All RHEL 9 world-writable directories must be owned by root, sys, bin, or an application user.<VulnDiscussion>If a world-writable directory is not owned by root, sys, bin, or an application user identifier (UID), unauthorized users may be able to modify files created by others. +If any crontab is not group owned by root, this is a finding.SRG-OS-000480-GPOS-00227<GroupDescription></GroupDescription>RHEL-09-232240All RHEL 9 world-writable directories must be owned by root, sys, bin, or an application user.<VulnDiscussion>If a world-writable directory is not owned by root, sys, bin, or an application user identifier (UID), unauthorized users may be able to modify files created by others. The only authorized public directories are those temporary directories supplied with the system or those designed to be temporary file repositories. The setting is normally reserved for directories used by the system and by users for temporary file storage, (e.g., /tmp), and for directories requiring global read/write access. -Satisfies: SRG-OS-000480-GPOS-00227, SRG-OS-000138-GPOS-00069</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000366CCI-001090Configure all public directories to be owned by root or a system account to prevent unauthorized and unintended information transferred via shared system resources. +Satisfies: SRG-OS-000480-GPOS-00227, SRG-OS-000138-GPOS-00069</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-001090Configure all public directories to be owned by root or a system account to prevent unauthorized and unintended information transferred via shared system resources. Set the owner of all public directories as root or a system account using the command, replace "[Public Directory]" with any directory path not owned by root or a system account: @@ -1868,25 +1919,25 @@ $ sudo stat -c "%a %n" /etc/shadow 0 /etc/shadow -If a value of "0" is not returned, this is a finding.SRG-OS-000096-GPOS-00050<GroupDescription></GroupDescription>RHEL-09-251010RHEL 9 must have the firewalld package installed.<VulnDiscussion>"Firewalld" provides an easy and effective way to block/limit remote access to the system via ports, services, and protocols. - -Remote access services, such as those providing remote access to network devices and information systems, which lack automated control capabilities, increase risk and make remote user access management difficult at best. - -Remote access is access to DOD nonpublic information systems by an authorized user (or an information system) communicating through an external, nonorganization-controlled network. Remote access methods include, for example, dial-up, broadband, and wireless. - -RHEL 9 functionality (e.g., SSH) must be capable of taking enforcement action if the audit reveals unauthorized activity. Automated control of remote access sessions allows organizations to ensure ongoing compliance with remote access policies by enforcing connection rules of remote access applications on a variety of information system components (e.g., servers, workstations, notebook computers, smartphones, and tablets). - -Satisfies: SRG-OS-000096-GPOS-00050, SRG-OS-000297-GPOS-00115, SRG-OS-000298-GPOS-00116, SRG-OS-000480-GPOS-00227, SRG-OS-000480-GPOS-00232</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000366CCI-000382CCI-002314CCI-002322To install the "firewalld" package run the following command: +If a value of "0" is not returned, this is a finding.SRG-OS-000096-GPOS-00050<GroupDescription></GroupDescription>RHEL-09-251010RHEL 9 must have the firewalld package installed.<VulnDiscussion>"Firewalld" provides an easy and effective way to block/limit remote access to the system via ports, services, and protocols. + +Remote access services, such as those providing remote access to network devices and information systems, which lack automated control capabilities, increase risk and make remote user access management difficult at best. + +Remote access is access to DOD nonpublic information systems by an authorized user (or an information system) communicating through an external, nonorganization-controlled network. Remote access methods include, for example, dial-up, broadband, and wireless. + +RHEL 9 functionality (e.g., SSH) must be capable of taking enforcement action if the audit reveals unauthorized activity. Automated control of remote access sessions allows organizations to ensure ongoing compliance with remote access policies by enforcing connection rules of remote access applications on a variety of information system components (e.g., servers, workstations, notebook computers, smartphones, and tablets). + +Satisfies: SRG-OS-000096-GPOS-00050, SRG-OS-000297-GPOS-00115, SRG-OS-000298-GPOS-00116, SRG-OS-000480-GPOS-00227, SRG-OS-000480-GPOS-00232</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000382CCI-002314CCI-002322To install the "firewalld" package run the following command: -$ sudo dnf install firewalldRun the following command to determine if the firewalld package is installed with the following command: +$ sudo dnf install firewalldRun the following command to determine if the firewalld package is installed with the following command: -$ sudo dnf list --installed firewalld +$ dnf list --installed firewalld Example output: firewalld.noarch 1.0.0-4.el9 -If the "firewall" package is not installed, this is a finding.SRG-OS-000096-GPOS-00050<GroupDescription></GroupDescription>RHEL-09-251015The firewalld service on RHEL 9 must be active.<VulnDiscussion>"Firewalld" provides an easy and effective way to block/limit remote access to the system via ports, services, and protocols. +If the "firewall" package is not installed, this is a finding.SRG-OS-000096-GPOS-00050<GroupDescription></GroupDescription>RHEL-09-251015The firewalld service on RHEL 9 must be active.<VulnDiscussion>"Firewalld" provides an easy and effective way to block/limit remote access to the system via ports, services, and protocols. Remote access services, such as those providing remote access to network devices and information systems, which lack automated control capabilities, increase risk and make remote user access management difficult at best. @@ -1894,7 +1945,7 @@ Remote access is access to DOD nonpublic information systems by an authorized us RHEL 9 functionality (e.g., RDP) must be capable of taking enforcement action if the audit reveals unauthorized activity. Automated control of remote access sessions allows organizations to ensure ongoing compliance with remote access policies by enforcing connection rules of remote access applications on a variety of information system components (e.g., servers, workstations, notebook computers, smartphones, and tablets). -Satisfies: SRG-OS-000096-GPOS-00050, SRG-OS-000297-GPOS-00115, SRG-OS-000480-GPOS-00227, SRG-OS-000480-GPOS-00232</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000366CCI-000382CCI-002314To enable the firewalld service run the following command: +Satisfies: SRG-OS-000096-GPOS-00050, SRG-OS-000297-GPOS-00115, SRG-OS-000480-GPOS-00227, SRG-OS-000480-GPOS-00232</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000382CCI-002314To enable the firewalld service run the following command: $ sudo systemctl enable --now firewalldVerify that "firewalld" is active with the following command: @@ -1938,13 +1989,13 @@ $ sudo firewall-cmd --permanent --info-zone=public | grep target target: DROP -If no zones are active on the RHEL 9 interfaces or if runtime and permanent targets are set to a different option other than "DROP", this is a finding.SRG-OS-000420-GPOS-00186<GroupDescription></GroupDescription>RHEL-09-251030RHEL 9 must protect against or limit the effects of denial-of-service (DoS) attacks by ensuring rate-limiting measures on impacted network interfaces are implemented.<VulnDiscussion>DoS is a condition when a resource is not available for legitimate users. When this occurs, the organization either cannot accomplish its mission or must operate at degraded capacity. +If no zones are active on the RHEL 9 interfaces or if runtime and permanent targets are set to a different option other than "DROP", this is a finding.SRG-OS-000420-GPOS-00186<GroupDescription></GroupDescription>RHEL-09-251030RHEL 9 must protect against or limit the effects of denial-of-service (DoS) attacks by ensuring rate-limiting measures on impacted network interfaces are implemented.<VulnDiscussion>DoS is a condition when a resource is not available for legitimate users. When this occurs, the organization either cannot accomplish its mission or must operate at degraded capacity. -This requirement addresses the configuration of RHEL 9 to mitigate the impact of DoS attacks that have occurred or are ongoing on system availability. For each system, known and potential DoS attacks must be identified and solutions for each type implemented. A variety of technologies exists to limit or, in some cases, eliminate the effects of DoS attacks (e.g., limiting processes or establishing memory partitions). Employing increased capacity and bandwidth, combined with service redundancy, may reduce the susceptibility to some DoS attacks.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-002385Configure "nftables" to be the default "firewallbackend" for "firewalld" by adding or editing the following line in "etc/firewalld/firewalld.conf": +This requirement addresses the configuration of RHEL 9 to mitigate the impact of DoS attacks that have occurred or are ongoing on system availability. For each system, known and potential DoS attacks must be identified and solutions for each type implemented. A variety of technologies exists to limit or, in some cases, eliminate the effects of DoS attacks (e.g., limiting processes or establishing memory partitions). Employing increased capacity and bandwidth, combined with service redundancy, may reduce the susceptibility to some DoS attacks.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-002385Configure "nftables" to be the default "firewallbackend" for "firewalld" by adding or editing the following line in "/etc/firewalld/firewalld.conf": FirewallBackend=nftables -Establish rate-limiting rules based on organization-defined types of DoS attacks on impacted network interfaces.Verify "nftables" is configured to allow rate limits on any connection to the system with the following command: +Establish rate-limiting rules based on organization-defined types of DoS attacks on impacted network interfaces.Verify "nftables" is configured to allow rate limits on any connection to the system with the following command: $ sudo grep -i firewallbackend /etc/firewalld/firewalld.conf @@ -1985,13 +2036,13 @@ $ sudo ip link set dev <devicename> multicast off promisc offSRG-OS-000480-GPOS-00227<GroupDescription></GroupDescription>RHEL-09-251045RHEL 9 must enable hardening for the Berkeley Packet Filter just-in-time compiler.<VulnDiscussion>When hardened, the extended Berkeley Packet Filter (BPF) just-in-time (JIT) compiler will randomize any kernel addresses in the BPF programs and maps, and will not expose the JIT addresses in "/proc/kallsyms".</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000366Configure RHEL 9 to enable hardening for the BPF JIT compiler by adding the following line to a file, in the "/etc/sysctl.d" directory: +If network interfaces are found on the system in promiscuous mode and their use has not been approved by the ISSO and documented, this is a finding.SRG-OS-000480-GPOS-00227<GroupDescription></GroupDescription>RHEL-09-251045RHEL 9 must enable hardening for the Berkeley Packet Filter just-in-time compiler.<VulnDiscussion>When hardened, the extended Berkeley Packet Filter (BPF) just-in-time (JIT) compiler will randomize any kernel addresses in the BPF programs and maps, and will not expose the JIT addresses in "/proc/kallsyms".</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000366Configure RHEL 9 to enable hardening for the BPF JIT compiler by adding the following line to a file, in the "/etc/sysctl.d" directory: net.core.bpf_jit_harden = 2 The system configuration files need to be reloaded for the changes to take effect. To reload the contents of the files, run the following command: -$ sudo sysctl --systemVerify RHEL 9 enables hardening for the BPF JIT with the following commands: +$ sudo sysctl --systemVerify RHEL 9 enables hardening for the BPF JIT with the following commands: $ sudo sysctl net.core.bpf_jit_harden @@ -2002,19 +2053,20 @@ If the returned line does not have a value of "2", or a line is not returned, th Check that the configuration files are present to enable this kernel parameter. $ sudo /usr/lib/systemd/systemd-sysctl --cat-config | egrep -v '^(#|;)' | grep -F net.core.bpf_jit_harden | tail -1 + net.core.bpf_jit_harden = 2 -If the network parameter "net.core.bpf_jit_harden" is not equal to "2" or nothing is returned, this is a finding.SRG-OS-000355-GPOS-00143<GroupDescription></GroupDescription>RHEL-09-252010RHEL 9 must have the chrony package installed.<VulnDiscussion>Inaccurate time stamps make it more difficult to correlate events and can lead to an inaccurate analysis. Determining the correct time a particular event occurred on a system is critical when conducting forensic analysis and investigating system events. Sources outside the configured acceptable allowance (drift) may be inaccurate.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-004923CCI-001891The chrony package can be installed with the following command: +If the network parameter "net.core.bpf_jit_harden" is not equal to "2" or nothing is returned, this is a finding.SRG-OS-000355-GPOS-00143<GroupDescription></GroupDescription>RHEL-09-252010RHEL 9 must have the chrony package installed.<VulnDiscussion>Inaccurate time stamps make it more difficult to correlate events and can lead to an inaccurate analysis. Determining the correct time a particular event occurred on a system is critical when conducting forensic analysis and investigating system events. Sources outside the configured acceptable allowance (drift) may be inaccurate.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-004923CCI-001891The chrony package can be installed with the following command: -$ sudo dnf install chronyVerify that RHEL 9 has the chrony package installed with the following command: +$ sudo dnf install chronyVerify that RHEL 9 has the chrony package installed with the following command: -$ sudo dnf list --installed chrony +$ dnf list --installed chrony Example output: chrony.x86_64 4.1-3.el9 -If the "chrony" package is not installed, this is a finding.SRG-OS-000355-GPOS-00143<GroupDescription></GroupDescription>RHEL-09-252015RHEL 9 chronyd service must be enabled.<VulnDiscussion>Inaccurate time stamps make it more difficult to correlate events and can lead to an inaccurate analysis. Determining the correct time a particular event occurred on a system is critical when conducting forensic analysis and investigating system events. Sources outside the configured acceptable allowance (drift) may be inaccurate. +If the "chrony" package is not installed, this is a finding.SRG-OS-000355-GPOS-00143<GroupDescription></GroupDescription>RHEL-09-252015RHEL 9 chronyd service must be enabled.<VulnDiscussion>Inaccurate time stamps make it more difficult to correlate events and can lead to an inaccurate analysis. Determining the correct time a particular event occurred on a system is critical when conducting forensic analysis and investigating system events. Sources outside the configured acceptable allowance (drift) may be inaccurate. Synchronizing internal information system clocks provides uniformity of time stamps for information systems with multiple system clocks and systems connected over a network.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-004923CCI-001891To enable the chronyd service run the following command: @@ -2024,7 +2076,7 @@ $ systemctl is-active chronyd active -If the chronyd service is not active, this is a finding.SRG-OS-000355-GPOS-00143<GroupDescription></GroupDescription>RHEL-09-252020RHEL 9 must securely compare internal information system clocks at least every 24 hours.<VulnDiscussion>Inaccurate time stamps make it more difficult to correlate events and can lead to an inaccurate analysis. Determining the correct time a particular event occurred on a system is critical when conducting forensic analysis and investigating system events. Sources outside the configured acceptable allowance (drift) may be inaccurate. +If the chronyd service is not active, this is a finding.SRG-OS-000355-GPOS-00143<GroupDescription></GroupDescription>RHEL-09-252020RHEL 9 must securely compare internal information system clocks at least every 24 hours.<VulnDiscussion>Inaccurate time stamps make it more difficult to correlate events and can lead to an inaccurate analysis. Determining the correct time a particular event occurred on a system is critical when conducting forensic analysis and investigating system events. Sources outside the configured acceptable allowance (drift) may be inaccurate. Synchronizing internal information system clocks provides uniformity of time stamps for information systems with multiple system clocks and systems connected over a network. @@ -2067,28 +2119,29 @@ $ grep -w cmdport /etc/chrony.conf cmdport 0 -If the "cmdport" option is not set to "0", is commented out, or is missing, this is a finding.SRG-OS-000480-GPOS-00227<GroupDescription></GroupDescription>RHEL-09-252035RHEL 9 systems using Domain Name Servers (DNS) resolution must have at least two name servers configured.<VulnDiscussion>To provide availability for name resolution services, multiple redundant name servers are mandated. A failure in name resolution could lead to the failure of security functions requiring name resolution, which may include time synchronization, centralized authentication, and remote system logging.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000366Configure the operating system to use two or more name servers for DNS resolution based on the DNS mode of the system. - -If the NetworkManager DNS mode is set to "none", then add the following lines to "/etc/resolv.conf": - +If the "cmdport" option is not set to "0", is commented out, or is missing, this is a finding.SRG-OS-000480-GPOS-00227<GroupDescription></GroupDescription>RHEL-09-252035RHEL 9 systems using Domain Name Servers (DNS) resolution must have at least two name servers configured.<VulnDiscussion>To provide availability for name resolution services, multiple redundant name servers are mandated. A failure in name resolution could lead to the failure of security functions requiring name resolution, which may include time synchronization, centralized authentication, and remote system logging.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000366Configure the operating system to use two or more name servers for DNS resolution based on the DNS mode of the system. + +If the NetworkManager DNS mode is set to "none", add the following lines to "/etc/resolv.conf": + nameserver [name server 1] nameserver [name server 2] - + Replace [name server 1] and [name server 2] with the IPs of two different DNS resolvers. + +If the NetworkManager DNS mode is set to "default", add two DNS servers to a NetworkManager connection using the following command: + +$ nmcli connection modify [connection name] ipv4.dns [name server 1],[name server 2] + +Replace [name server 1] and [name server 2] with the IPs of two different DNS resolvers. Replace [connection name] with a valid NetworkManager connection name on the system. Replace ipv4 with ipv6 if IPv6 DNS servers are used.Note: If the system is running in a cloud platform and the cloud provider gives a single, highly available IP address for DNS configuration, this control is Not Applicable. -If the NetworkManager DNS mode is set to "default" then add two DNS servers to a NetworkManager connection. Using the following commands: - -$ sudo nmcli connection modify [connection name] ipv4.dns [name server 1] -$ sudo nmcli connection modify [connection name] ipv4.dns [name server 2] - -Replace [name server 1] and [name server 2] with the IPs of two different DNS resolvers. Replace [connection name] with a valid NetworkManager connection name on the system. Replace ipv4 with ipv6 if IPv6 DNS servers are used.Verify the name servers used by the system with the following command: +Verify the name servers used by the system with the following command: $ grep nameserver /etc/resolv.conf nameserver 192.168.1.2 nameserver 192.168.1.3 -If less than two lines are returned that are not commented out, this is a finding.SRG-OS-000480-GPOS-00227<GroupDescription></GroupDescription>RHEL-09-252040RHEL 9 must configure a DNS processing mode in Network Manager.<VulnDiscussion>In order to ensure that DNS resolver settings are respected, a DNS mode in Network Manager must be configured.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000366Configure NetworkManager in RHEL 9 to use a DNS mode. +If fewer than two lines are returned that are not commented out, this is a finding.SRG-OS-000480-GPOS-00227<GroupDescription></GroupDescription>RHEL-09-252040RHEL 9 must configure a DNS processing mode in Network Manager.<VulnDiscussion>In order to ensure that DNS resolver settings are respected, a DNS mode in Network Manager must be configured.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000366Configure NetworkManager in RHEL 9 to use a DNS mode. In "/etc/NetworkManager/NetworkManager.conf" add the following line in the "[main]" section: @@ -2104,19 +2157,17 @@ dns=none If the dns key under main does not exist or is not set to "none" or "default", this is a finding. -Note: If RHEL 9 is configured to use a DNS resolver other than Network Manager, the configuration must be documented and approved by the information system security officer (ISSO).SRG-OS-000480-GPOS-00227<GroupDescription></GroupDescription>RHEL-09-252045RHEL 9 must not have unauthorized IP tunnels configured.<VulnDiscussion>IP tunneling mechanisms can be used to bypass network filtering. If tunneling is required, it must be documented with the information system security officer (ISSO).</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000366Remove all unapproved tunnels from the system, or document them with the ISSO.Verify that RHEL 9 does not have unauthorized IP tunnels configured. +Note: If RHEL 9 is configured to use a DNS resolver other than Network Manager, the configuration must be documented and approved by the information system security officer (ISSO).SRG-OS-000480-GPOS-00227<GroupDescription></GroupDescription>RHEL-09-252045RHEL 9 must not have unauthorized IP tunnels configured.<VulnDiscussion>IP tunneling mechanisms can be used to bypass network filtering. If tunneling is required, it must be documented with the information system security officer (ISSO).</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000366Remove all unapproved tunnels from the system, or document them with the ISSO.Verify that RHEL 9 does not have unauthorized IP tunnels configured. Determine if the "IPsec" service is active with the following command: -$ systemctl status ipsec +$ systemctl is-active ipsec -ipsec.service - Internet Key Exchange (IKE) Protocol Daemon for IPsec -Loaded: loaded (/usr/lib/systemd/system/ipsec.service; disabled) -Active: inactive (dead) +Inactive If the "IPsec" service is active, check for configured IPsec connections ("conn"), with the following command: -$ grep -rni conn /etc/ipsec.conf /etc/ipsec.d/ +$ sudo grep -rni conn /etc/ipsec.conf /etc/ipsec.d/ Verify any returned results are documented with the ISSO. @@ -2146,15 +2197,15 @@ Check that the "/etc/aliases" file has a defined value for "root". $ sudo grep "postmaster:\s*root$" /etc/aliases -If the command does not return a line, or the line is commented out, ask the system administrator to indicate how they and the information systems security officer (ISSO) are notified of an audit process failure. If there is no evidence of the proper personnel being notified of an audit processing failure, this is a finding.SRG-OS-000480-GPOS-00227<GroupDescription></GroupDescription>RHEL-09-252065RHEL 9 libreswan package must be installed.<VulnDiscussion>Providing the ability for remote users or systems to initiate a secure VPN connection protects information when it is transmitted over a wide area network. +If the command does not return a line, or the line is commented out, ask the system administrator to indicate how they and the information systems security officer (ISSO) are notified of an audit process failure. If there is no evidence of the proper personnel being notified of an audit processing failure, this is a finding.SRG-OS-000480-GPOS-00227<GroupDescription></GroupDescription>RHEL-09-252065RHEL 9 libreswan package must be installed.<VulnDiscussion>Providing the ability for remote users or systems to initiate a secure VPN connection protects information when it is transmitted over a wide area network. -Satisfies: SRG-OS-000480-GPOS-00227, SRG-OS-000120-GPOS-00061</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000366CCI-000803Install the libreswan service (if it is not already installed) with the following command: +Satisfies: SRG-OS-000480-GPOS-00227, SRG-OS-000120-GPOS-00061</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000803Install the libreswan service (if it is not already installed) with the following command: -$ sudo dnf install libreswanVerify that RHEL 9 libreswan service package is installed. +$ sudo dnf install libreswanVerify that RHEL 9 libreswan service package is installed. Check that the libreswan service package is installed with the following command: -$ sudo dnf list --installed libreswan +$ dnf list --installed libreswan Example output: @@ -2172,11 +2223,11 @@ $ sudo rm /[path]/[to]/[file]/.shostsSRG-OS-000480-GPOS-00227<GroupDescription></GroupDescription>RHEL-09-253010RHEL 9 must be configured to use TCP syncookies.<VulnDiscussion>Denial of service (DoS) is a condition when a resource is not available for legitimate users. When this occurs, the organization either cannot accomplish its mission or must operate at degraded capacity. +If a ".shosts" file is found, this is a finding.SRG-OS-000480-GPOS-00227<GroupDescription></GroupDescription>RHEL-09-253010RHEL 9 must be configured to use TCP syncookies.<VulnDiscussion>Denial of service (DoS) is a condition when a resource is not available for legitimate users. When this occurs, the organization either cannot accomplish its mission or must operate at degraded capacity. Managing excess capacity ensures that sufficient capacity is available to counter flooding attacks. Employing increased capacity and service redundancy may reduce the susceptibility to some DoS attacks. Managing excess capacity may include, for example, establishing selected usage priorities, quotas, or partitioning. -Satisfies: SRG-OS-000480-GPOS-00227, SRG-OS-000420-GPOS-00186, SRG-OS-000142-GPOS-00071</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000366CCI-001095CCI-002385Configure RHEL 9 to use TCP syncookies. +Satisfies: SRG-OS-000480-GPOS-00227, SRG-OS-000420-GPOS-00186, SRG-OS-000142-GPOS-00071</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-001095CCI-002385Configure RHEL 9 to use TCP syncookies. Add or edit the following line in a system configuration file in the "/etc/sysctl.d/" directory: net.ipv4.tcp_syncookies = 1 @@ -2495,7 +2546,7 @@ $ sudo /usr/lib/systemd/systemd-sysctl --cat-config | egrep -v '^(#|;)' | grep - net.ipv4.conf.default.send_redirects = 0 -If "net.ipv4.conf.default.send_redirects" is not set to "0" and is not documented with the information system security officer (ISSO) as an operational requirement or is missing, this is a finding.SRG-OS-000480-GPOS-00227<GroupDescription></GroupDescription>RHEL-09-253075RHEL 9 must not enable IPv4 packet forwarding unless the system is a router.<VulnDiscussion>Routing protocol daemons are typically used on routers to exchange network topology information with other routers. If this capability is used when not required, system network information may be unnecessarily transmitted across the network.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000366Configure RHEL 9 to not allow IPv4 packet forwarding, unless the system is a router. +If "net.ipv4.conf.default.send_redirects" is not set to "0" and is not documented with the information system security officer (ISSO) as an operational requirement or is missing, this is a finding.SRG-OS-000480-GPOS-00227<GroupDescription></GroupDescription>RHEL-09-253075RHEL 9 must not enable IPv4 packet forwarding unless the system is a router.<VulnDiscussion>Routing protocol daemons are typically used on routers to exchange network topology information with other routers. If this capability is used when not required, system network information may be unnecessarily transmitted across the network.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000366Configure RHEL 9 to not allow IPv4 packet forwarding, unless the system is a router. Add or edit the following line in a single system configuration file, in the "/etc/sysctl.d/" directory: @@ -2503,7 +2554,7 @@ net.ipv4.conf.all.forwarding = 0 Load settings from all system configuration files with the following command: -$ sudo sysctl --systemVerify RHEL 9 is not performing IPv4 packet forwarding, unless the system is a router. +$ sudo sysctl --systemVerify RHEL 9 is not performing IPv4 packet forwarding unless the system is a router. Check that IPv4 forwarding is disabled using the following command: @@ -2515,7 +2566,7 @@ If the IPv4 forwarding value is not "0" and is not documented with the informati Check that the configuration files are present to enable this network parameter. -$ sudo (/usr/lib/systemd/systemd-sysctl --cat-config; cat /etc/sysctl.conf) | egrep -v '^(#|$)' | grep net.ipv4.conf.all.forwarding | tail -1 +$ /usr/lib/systemd/systemd-sysctl --cat-config | egrep -v '^(#|$)' | grep -F net.ipv4.conf.all.forwarding | tail -1 net.ipv4.conf.all.forwarding = 0 @@ -2703,7 +2754,7 @@ $ sudo /usr/lib/systemd/systemd-sysctl --cat-config | egrep -v '^(#|;)' | grep net.ipv6.conf.default.accept_source_route = 0 -If "net.ipv6.conf.default.accept_source_route" is not set to "0" or is missing, this is a finding.SRG-OS-000423-GPOS-00187<GroupDescription></GroupDescription>RHEL-09-255010All RHEL 9 networked systems must have SSH installed.<VulnDiscussion>Without protection of the transmitted information, confidentiality and integrity may be compromised because unprotected communications can be intercepted and either read or altered. +If "net.ipv6.conf.default.accept_source_route" is not set to "0" or is missing, this is a finding.SRG-OS-000423-GPOS-00187<GroupDescription></GroupDescription>RHEL-09-255010All RHEL 9 networked systems must have SSH installed.<VulnDiscussion>Without protection of the transmitted information, confidentiality and integrity may be compromised because unprotected communications can be intercepted and either read or altered. This requirement applies to both internal and external networks and all types of information system components from which information can be transmitted (e.g., servers, mobile devices, notebook computers, printers, copiers, scanners, and facsimile machines). Communication paths outside the physical protection of a controlled boundary are exposed to the possibility of interception and modification. @@ -2711,9 +2762,9 @@ Protecting the confidentiality and integrity of organizational information can b Satisfies: SRG-OS-000423-GPOS-00187, SRG-OS-000424-GPOS-00188, SRG-OS-000425-GPOS-00189, SRG-OS-000426-GPOS-00190</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-002418CCI-002420CCI-002421CCI-002422The openssh-server package can be installed with the following command: -$ sudo dnf install openssh-serverVerify that RHEL 9 has the openssh-server package installed with the following command: +$ sudo dnf install openssh-serverVerify that RHEL 9 has the openssh-server package installed with the following command: -$ sudo dnf list --installed openssh-server +$ dnf list --installed openssh-server Example output: @@ -2733,41 +2784,39 @@ $ systemctl is-active sshd active -If the "sshd" service is not active, this is a finding.SRG-OS-000480-GPOS-00227<GroupDescription></GroupDescription>RHEL-09-255020RHEL 9 must have the openssh-clients package installed.<VulnDiscussion>This package includes utilities to make encrypted connections and transfer files securely to SSH servers.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000366The openssh-clients package can be installed with the following command: - -$ sudo dnf install openssh-clientsVerify that RHEL 9 has the openssh-clients package installed with the following command: +If the "sshd" service is not active, this is a finding.SRG-OS-000480-GPOS-00227<GroupDescription></GroupDescription>RHEL-09-255020RHEL 9 must have the openssh-clients package installed.<VulnDiscussion>This package includes utilities to make encrypted connections and transfer files securely to SSH servers.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000366The openssh-clients package can be installed with the following command: + +$ sudo dnf install openssh-clientsVerify that RHEL 9 has the openssh-clients package installed with the following command: -$ sudo dnf list --installed openssh-clients +$ dnf list --installed openssh-clients Example output: openssh-clients.x86_64 8.7p1-8.el9 -If the "openssh-clients" package is not installed, this is a finding.SRG-OS-000023-GPOS-00006<GroupDescription></GroupDescription>RHEL-09-255025RHEL 9 must display the Standard Mandatory DOD Notice and Consent Banner before granting local or remote access to the system via a SSH logon.<VulnDiscussion>The warning message reinforces policy awareness during the logon process and facilitates possible legal action against attackers. Alternatively, systems whose ownership should not be obvious should ensure usage of a banner that does not provide easy attribution. +If the "openssh-clients" package is not installed, this is a finding.SRG-OS-000023-GPOS-00006<GroupDescription></GroupDescription>RHEL-09-255025RHEL 9 must display the Standard Mandatory DOD Notice and Consent Banner before granting local or remote access to the system via a SSH logon.<VulnDiscussion>The warning message reinforces policy awareness during the logon process and facilitates possible legal action against attackers. Alternatively, systems whose ownership should not be obvious should ensure usage of a banner that does not provide easy attribution. -Satisfies: SRG-OS-000023-GPOS-00006, SRG-OS-000228-GPOS-00088</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000048CCI-001384CCI-001385CCI-001386CCI-001387CCI-001388Configure RHEL 9 to display the Standard Mandatory DOD Notice and Consent Banner before granting access to the system via ssh. +Satisfies: SRG-OS-000023-GPOS-00006, SRG-OS-000228-GPOS-00088</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000048CCI-001384CCI-001385CCI-001386CCI-001387CCI-001388Configure RHEL 9 to display the Standard Mandatory DOD Notice and Consent Banner before granting access to the system via ssh. -Edit the "/etc/ssh/sshd_config" file to uncomment the banner keyword and configure it to point to a file that will contain the logon banner (this file may be named differently or be in a different location if using a version of SSH that is provided by a third-party vendor). +Edit the "etc/ssh/sshd_config" file or a file in "/etc/ssh/sshd_config.d" to uncomment the banner keyword and configure it to point to a file that will contain the logon banner (this file may be named differently or be in a different location if using a version of SSH that is provided by a third-party vendor). An example configuration line is: -Banner /etc/issueVerify that any SSH connection to the operating system displays the Standard Mandatory DOD Notice and Consent Banner before granting access to the system. +Banner /etc/issueVerify that any SSH connection to the operating system displays the Standard Mandatory DOD Notice and Consent Banner before granting access to the system. -Check for the location of the banner file being used with the following command: +Check for the location of the banner file currently being used with the following command: $ sudo /usr/sbin/sshd -dd 2>&1 | awk '/filename/ {print $4}' | tr -d '\r' | tr '\n' ' ' | xargs sudo grep -iH '^\s*banner' banner /etc/issue -This command will return the banner keyword and the name of the file that contains the SSH banner (in this case "/etc/issue"). - -If the line is commented out, this is a finding.SRG-OS-000032-GPOS-00013<GroupDescription></GroupDescription>RHEL-09-255030RHEL 9 must log SSH connection attempts and failures to the server.<VulnDiscussion>SSH provides several logging levels with varying amounts of verbosity. "DEBUG" is specifically not recommended other than strictly for debugging SSH communications since it provides so much data that it is difficult to identify important security information. "INFO" or "VERBOSE" level is the basic level that only records login activity of SSH users. In many situations, such as Incident Response, it is important to determine when a particular user was active on a system. The logout record can eliminate those users who disconnected, which helps narrow the field.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000067Configure RHEL 9 to log connection attempts add or modify the following line in "/etc/ssh/sshd_config". +If the line is commented out or if the file is missing, this is a finding.SRG-OS-000032-GPOS-00013<GroupDescription></GroupDescription>RHEL-09-255030RHEL 9 must log SSH connection attempts and failures to the server.<VulnDiscussion>SSH provides several logging levels with varying amounts of verbosity. "DEBUG" is specifically not recommended other than strictly for debugging SSH communications since it provides so much data that it is difficult to identify important security information. "INFO" or "VERBOSE" level is the basic level that only records login activity of SSH users. In many situations, such as Incident Response, it is important to determine when a particular user was active on a system. The logout record can eliminate those users who disconnected, which helps narrow the field.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000067Configure RHEL 9 to log connection attempts add or modify the following line in "/etc/ssh/sshd_config" or in a file in "/etc/ssh/sshd_config.d". LogLevel VERBOSE Restart the SSH daemon for the settings to take effect: -$ sudo systemctl restart sshd.serviceVerify that RHEL 9 logs SSH connection attempts and failures to the server. +$ sudo systemctl restart sshd.serviceVerify that RHEL 9 logs SSH connection attempts and failures to the server. Check what the SSH daemon's "LogLevel" option is set to with the following command: @@ -2775,57 +2824,57 @@ $ sudo /usr/sbin/sshd -dd 2>&1 | awk '/filename/ {print $4}' | tr -d '\r' LogLevel VERBOSE -If a value of "VERBOSE" is not returned or the line is commented out or missing, this is a finding.SRG-OS-000105-GPOS-00052<GroupDescription></GroupDescription>RHEL-09-255035RHEL 9 SSHD must accept public key authentication.<VulnDiscussion>Without the use of multifactor authentication, the ease of access to privileged functions is greatly increased. Multifactor authentication requires using two or more factors to achieve authentication. A privileged account is defined as an information system account with authorizations of a privileged user. A DOD common access card (CAC) with DOD-approved PKI is an example of multifactor authentication. +If a value of "VERBOSE" is not returned or the line is commented out or missing, this is a finding.SRG-OS-000105-GPOS-00052<GroupDescription></GroupDescription>RHEL-09-255035RHEL 9 SSHD must accept public key authentication.<VulnDiscussion>Without the use of multifactor authentication, the ease of access to privileged functions is greatly increased. Multifactor authentication requires using two or more factors to achieve authentication. A privileged account is defined as an information system account with authorizations of a privileged user. A DOD common access card (CAC) with DOD-approved PKI is an example of multifactor authentication. -Satisfies: SRG-OS-000105-GPOS-00052, SRG-OS-000106-GPOS-00053, SRG-OS-000107-GPOS-00054, SRG-OS-000108-GPOS-00055</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000765CCI-000766CCI-000767CCI-000768To configure the system add or modify the following line in "/etc/ssh/sshd_config". +Satisfies: SRG-OS-000105-GPOS-00052, SRG-OS-000106-GPOS-00053, SRG-OS-000107-GPOS-00054, SRG-OS-000108-GPOS-00055</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000765CCI-000766CCI-000767CCI-000768To configure the system, add or modify the following line in "/etc/ssh/sshd_config" or in a file in "/etc/ssh/sshd_config.d". PubkeyAuthentication yes Restart the SSH daemon for the settings to take effect: -$ sudo systemctl restart sshd.serviceVerify that RHEL 9 SSH daemon accepts public key encryption with the following command: +$ sudo systemctl restart sshd.serviceNote: If the system administrator demonstrates the use of an approved alternate multifactor authentication method, this requirement is Not Applicable. + +Verify that RHEL 9 SSH daemon accepts public key encryption with the following command: $ sudo /usr/sbin/sshd -dd 2>&1 | awk '/filename/ {print $4}' | tr -d '\r' | tr '\n' ' ' | xargs sudo grep -iH '^\s*pubkeyauthentication' PubkeyAuthentication yes -If "PubkeyAuthentication" is set to no, the line is commented out, or the line is missing, this is a finding. +If "PubkeyAuthentication" is set to no, the line is commented out, or the line is missing, this is a finding.SRG-OS-000106-GPOS-00053<GroupDescription></GroupDescription>RHEL-09-255040RHEL 9 SSHD must not allow blank passwords.<VulnDiscussion>If an account has an empty password, anyone could log on and run commands with the privileges of that account. Accounts with empty passwords should never be used in operational environments. -Note: If the system administrator demonstrates the use of an approved alternate multifactor authentication method, this requirement is not applicable.SRG-OS-000106-GPOS-00053<GroupDescription></GroupDescription>RHEL-09-255040RHEL 9 SSHD must not allow blank passwords.<VulnDiscussion>If an account has an empty password, anyone could log on and run commands with the privileges of that account. Accounts with empty passwords should never be used in operational environments. - -Satisfies: SRG-OS-000106-GPOS-00053, SRG-OS-000480-GPOS-00229, SRG-OS-000480-GPOS-00227</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000366CCI-000766To configure the system to prevent SSH users from logging on with blank passwords edit the following line in "etc/ssh/sshd_config": +Satisfies: SRG-OS-000106-GPOS-00053, SRG-OS-000480-GPOS-00229, SRG-OS-000480-GPOS-00227</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000766To configure the system to prevent SSH users from logging on with blank passwords edit the following line in "/etc/ssh/sshd_config" or in a file in "/etc/ssh/sshd_config.d": PermitEmptyPasswords no Restart the SSH daemon for the settings to take effect: -$ sudo systemctl restart sshd.serviceVerify that RHEL 9 remote access using SSH prevents logging on with a blank password with the following command: +$ sudo systemctl restart sshd.serviceVerify that RHEL 9 remote access using SSH prevents logging on with a blank password with the following command: $ sudo /usr/sbin/sshd -dd 2>&1 | awk '/filename/ {print $4}' | tr -d '\r' | tr '\n' ' ' | xargs sudo grep -iH '^\s*permitemptypasswords' PermitEmptyPasswords no -If the "PermitEmptyPasswords" keyword is set to "yes", is missing, or is commented out, this is a finding.SRG-OS-000109-GPOS-00056<GroupDescription></GroupDescription>RHEL-09-255045RHEL 9 must not permit direct logons to the root account using remote access via SSH.<VulnDiscussion>Even though the communications channel may be encrypted, an additional layer of security is gained by extending the policy of not logging directly on as root. In addition, logging in with a user-specific account provides individual accountability of actions performed on the system and also helps to minimize direct attack attempts on root's password. +If the "PermitEmptyPasswords" keyword is set to "yes", is missing, or is commented out, this is a finding.SRG-OS-000109-GPOS-00056<GroupDescription></GroupDescription>RHEL-09-255045RHEL 9 must not permit direct logons to the root account using remote access via SSH.<VulnDiscussion>Even though the communications channel may be encrypted, an additional layer of security is gained by extending the policy of not logging directly on as root. In addition, logging in with a user-specific account provides individual accountability of actions performed on the system and also helps to minimize direct attack attempts on root's password. -Satisfies: SRG-OS-000109-GPOS-00056, SRG-OS-000480-GPOS-00227</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000366CCI-004045CCI-000770To configure the system to prevent SSH users from logging on directly as root add or modify the following line in "/etc/ssh/sshd_config". +Satisfies: SRG-OS-000109-GPOS-00056, SRG-OS-000480-GPOS-00227</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-004045CCI-000770To configure the system to prevent SSH users from logging on directly as root add or modify the following line in "/etc/ssh/sshd_config" or in a file in "/etc/ssh/sshd_config.d". PermitRootLogin no Restart the SSH daemon for the settings to take effect: -$ sudo systemctl restart sshd.serviceVerify that RHEL 9 remote access using SSH prevents users from logging on directly as "root" with the following command: +$ sudo systemctl restart sshd.serviceVerify that RHEL 9 remote access using SSH prevents users from logging on directly as "root" with the following command: $ sudo /usr/sbin/sshd -dd 2>&1 | awk '/filename/ {print $4}' | tr -d '\r' | tr '\n' ' ' | xargs sudo grep -iH '^\s*permitrootlogin' PermitRootLogin no -If the "PermitRootLogin" keyword is set to "yes", is missing, or is commented out, this is a finding.SRG-OS-000125-GPOS-00065<GroupDescription></GroupDescription>RHEL-09-255050RHEL 9 must enable the Pluggable Authentication Module (PAM) interface for SSHD.<VulnDiscussion>When UsePAM is set to "yes", PAM runs through account and session types properly. This is important when restricted access to services based off of IP, time, or other factors of the account is needed. Additionally, this ensures users can inherit certain environment variables on login or disallow access to the server.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000877Configure the RHEL 9 SSHD to use the UsePAM interface add or modify the following line in "/etc/ssh/sshd_config". +If the "PermitRootLogin" keyword is set to "yes", is missing, or is commented out, this is a finding.SRG-OS-000125-GPOS-00065<GroupDescription></GroupDescription>RHEL-09-255050RHEL 9 must enable the Pluggable Authentication Module (PAM) interface for SSHD.<VulnDiscussion>When UsePAM is set to "yes", PAM runs through account and session types properly. This is important when restricted access to services based off of IP, time, or other factors of the account is needed. Additionally, this ensures users can inherit certain environment variables on login or disallow access to the server.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000877Configure the RHEL 9 SSHD to use the UsePAM interface by adding or modifying the following line in "/etc/ssh/sshd_config" or in a file in "/etc/ssh/sshd_config.d". UsePAM yes Restart the SSH daemon for the settings to take effect: -$ sudo systemctl restart sshd.serviceVerify the RHEL 9 SSHD is configured to allow for the UsePAM interface with the following command: +$ sudo systemctl restart sshd.serviceVerify the RHEL 9 SSHD is configured to allow for the UsePAM interface with the following command: $ sudo /usr/sbin/sshd -dd 2>&1 | awk '/filename/ {print $4}' | tr -d '\r' | tr '\n' ' ' | xargs sudo grep -iH '^\s*usepam' @@ -2844,59 +2893,83 @@ $ sudo /usr/sbin/sshd -dd 2>&1 | awk '/filename/ {print $4}' | tr -d '\r' /etc/ssh/sshd_config:Include /etc/ssh/sshd_config.d/*.conf /etc/ssh/sshd_config.d/50-redhat.conf:Include /etc/crypto-policies/back-ends/opensshserver.config -If "Include /etc/ssh/sshd_config.d/*.conf" or "Include /etc/crypto-policies/back-ends/opensshserver.config" are not included in the system sshd config this is a finding. Additionally, if the file /etc/ssh/sshd_config.d/50-redhat.conf is missing, this is a finding.SRG-OS-000250-GPOS-00093<GroupDescription></GroupDescription>RHEL-09-255060RHEL 9 must implement DOD-approved encryption ciphers to protect the confidentiality of SSH client connections.<VulnDiscussion>Without cryptographic integrity protections, information can be altered by unauthorized users without detection. +If "Include /etc/ssh/sshd_config.d/*.conf" or "Include /etc/crypto-policies/back-ends/opensshserver.config" are not included in the system sshd config this is a finding. Additionally, if the file /etc/ssh/sshd_config.d/50-redhat.conf is missing, this is a finding.SRG-OS-000250-GPOS-00093<GroupDescription></GroupDescription>RHEL-09-255060RHEL 9 must implement DOD-approved encryption ciphers to protect the confidentiality of SSH connections.<VulnDiscussion>Without cryptographic integrity protections, information can be altered by unauthorized users without detection. -Remote access (e.g., RDP) is access to DOD nonpublic information systems by an authorized user (or an information system) communicating through an external, non-organization-controlled network. Remote access methods include, for example, dial-up, broadband, and wireless. +Remote access (e.g., RDP) is access to DOD nonpublic information systems by an authorized user (or an information system) communicating through an external, nonorganization-controlled network. Remote access methods include, for example, dial-up, broadband, and wireless. Cryptographic mechanisms used for protecting the integrity of information include, for example, signed hash functions using asymmetric cryptography enabling distribution of the public key to verify the hash information while maintaining the confidentiality of the secret key used to generate the hash. -RHEL 9 incorporates system-wide crypto policies by default. The SSH configuration file has no effect on the ciphers, MACs, or algorithms unless specifically defined in the /etc/sysconfig/sshd file. The employed algorithms can be viewed in the /etc/crypto-policies/back-ends/opensshserver.config file.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-001453Configure the RHEL 9 SSH daemon to use system-wide crypto policies by running the following commands: +RHEL 9 incorporates systemwide crypto policies by default. The SSH configuration file has no effect on the ciphers, MACs, or algorithms unless specifically defined in the /etc/sysconfig/sshd file. The employed algorithms can be viewed in the /etc/crypto-policies/back-ends/opensshserver.config file.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-001453Configure the RHEL 9 SSH daemon to use systemwide crypto policies. -$ sudo dnf reinstall openssh-clientsVerify that system-wide crypto policies are in effect with the following command: +Reinstall OpenSSH client package contents with the following command: -$ sudo grep Include /etc/ssh/sshd_config /etc/ssh/sshd_config.d/* +$ sudo dnf -y reinstall opensshVerify that RHEL 9 implements DOD-approved encryption ciphers for SSH connections. + +Verify that the SSH configuration files include the path to the systemwide policy with the following command: + +$ sudo grep -R Include /etc/ssh/sshd_config /etc/ssh/sshd_config.d/ /etc/ssh/sshd_config:Include /etc/ssh/sshd_config.d/*.conf /etc/ssh/sshd_config.d/50-redhat.conf:Include /etc/crypto-policies/back-ends/opensshserver.config -If "Include /etc/ssh/sshd_config.d/*.conf" or "Include /etc/crypto-policies/back-ends/opensshserver.config" are not included in the system sshd config or the file "/etc/ssh/sshd_config.d/50-redhat.conf" is missing, this is a finding.SRG-OS-000250-GPOS-00093<GroupDescription></GroupDescription>RHEL-09-255065RHEL 9 must implement DOD-approved encryption ciphers to protect the confidentiality of SSH server connections.<VulnDiscussion>Without cryptographic integrity protections, information can be altered by unauthorized users without detection. +If "Include /etc/ssh/sshd_config.d/*.conf" or "Include /etc/crypto-policies/back-ends/opensshserver.config" are not included in the system sshd config or if the file "/etc/ssh/sshd_config.d/50-redhat.conf" is missing, this is a finding.SRG-OS-000250-GPOS-00093<GroupDescription></GroupDescription>RHEL-09-255065The RHEL 9 SSH server must be configured to use only DOD-approved encryption ciphers employing FIPS 140-3 validated cryptographic hash algorithms to protect the confidentiality of SSH server connections.<VulnDiscussion>Without cryptographic integrity protections, information can be altered by unauthorized users without detection. Remote access (e.g., RDP) is access to DOD nonpublic information systems by an authorized user (or an information system) communicating through an external, nonorganization-controlled network. Remote access methods include, for example, dial-up, broadband, and wireless. Cryptographic mechanisms used for protecting the integrity of information include, for example, signed hash functions using asymmetric cryptography enabling distribution of the public key to verify the hash information while maintaining the confidentiality of the secret key used to generate the hash. -RHEL 9 incorporates system-wide crypto policies by default. The SSH configuration file has no effect on the ciphers, MACs, or algorithms unless specifically defined in the /etc/sysconfig/sshd file. The employed algorithms can be viewed in the /etc/crypto-policies/back-ends/opensshserver.config file.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-001453Configure the RHEL 9 SSH client to use only ciphers employing FIPS 140-3 approved algorithms by updating the "/etc/crypto-policies/back-ends/openssh.config" file with the following line: +RHEL 9 incorporates systemwide crypto policies by default. The SSH configuration file has no effect on the ciphers, MACs, or algorithms unless specifically defined in the /etc/sysconfig/sshd file. The employed algorithms can be viewed in the /etc/crypto-policies/back-ends/opensshserver.config file.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-001453Configure the RHEL 9 SSH server to use only ciphers employing FIPS 140-3 approved algorithms. + +Reinstall crypto-policies with the following command: + +$ sudo dnf -y reinstall crypto-policies -Ciphers aes256-gcm@openssh.com,chacha20-poly1305@openssh.com,aes256-ctr,aes128-gcm@openssh.com,aes128-ctr +Set the crypto-policy to FIPS with the following command: -A reboot is required for the changes to take effect.Verify the SSH client is configured to use only ciphers employing FIPS 140-3 approved algorithms with the following command: +$ sudo update-crypto-policies --set FIPS -$ sudo grep -i ciphers /etc/crypto-policies/back-ends/openssh.config +Setting system policy to FIPS -Ciphers aes256-gcm@openssh.com,chacha20-poly1305@openssh.com,aes256-ctr,aes128-gcm@openssh.com,aes128-ctr +Note: Systemwide crypto policies are applied on application startup. It is recommended to restart the system for the change of policies to fully take place.Verify the SSH server is configured to use only ciphers employing FIPS 140-3 approved algorithms. -If the cipher entries in the "openssh.config" file have any ciphers other than "aes256-gcm@openssh.com,chacha20-poly1305@openssh.com,aes256-ctr,aes128-gcm@openssh.com,aes128-ctr", the order differs from the example above, they are missing, or commented out, this is a finding.SRG-OS-000250-GPOS-00093<GroupDescription></GroupDescription>RHEL-09-255075RHEL 9 SSH server must be configured to use only Message Authentication Codes (MACs) employing FIPS 140-3 validated cryptographic hash algorithms.<VulnDiscussion>Without cryptographic integrity protections, information can be altered by unauthorized users without detection. +To verify the ciphers in the systemwide SSH configuration file, use the following command: + +$ sudo grep -i Ciphers /etc/crypto-policies/back-ends/opensshserver.config +Ciphers aes256-gcm@openssh.com,aes256-ctr,aes128-gcm@openssh.com,aes128-ctr + +If the cipher entries in the "opensshserver.config" file have any ciphers other than "aes256-gcm@openssh.com,aes256-ctr,aes128-gcm@openssh.com,aes128-ctr", or they are missing or commented out, this is a finding.SRG-OS-000250-GPOS-00093<GroupDescription></GroupDescription>RHEL-09-255075The RHEL 9 SSH server must be configured to use only Message Authentication Codes (MACs) employing FIPS 140-3 validated cryptographic hash algorithms to protect the confidentiality of SSH server connections.<VulnDiscussion>Without cryptographic integrity protections, information can be altered by unauthorized users without detection. Remote access (e.g., RDP) is access to DOD nonpublic information systems by an authorized user (or an information system) communicating through an external, nonorganization-controlled network. Remote access methods include, for example, dial-up, broadband, and wireless. Cryptographic mechanisms used for protecting the integrity of information include, for example, signed hash functions using asymmetric cryptography enabling distribution of the public key to verify the hash information while maintaining the confidentiality of the secret key used to generate the hash. -RHEL 9 incorporates system-wide crypto policies by default. The SSH configuration file has no effect on the ciphers, MACs, or algorithms unless specifically defined in the /etc/sysconfig/sshd file. The employed algorithms can be viewed in the /etc/crypto-policies/back-ends/opensshserver.config file.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-001453Configure the RHEL 9 SSH server to use only MACs employing FIPS 140-3 approved algorithms by updating the "/etc/crypto-policies/back-ends/openssh.config" file with the following line: +RHEL 9 incorporates systemwide crypto policies by default. The SSH configuration file has no effect on the ciphers, MACs, or algorithms unless specifically defined in the /etc/sysconfig/sshd file. The employed algorithms can be viewed in the /etc/crypto-policies/back-ends/opensshserver.config file.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-001453Configure the RHEL 9 SSH server to use only MACs employing FIPS 140-3 approved algorithms. + +Reinstall crypto-policies with the following command: + +$ sudo dnf -y reinstall crypto-policies + +Set the crypto-policy to FIPS with the following command: + +$ sudo update-crypto-policies --set FIPS + +Setting system policy to FIPS + +Note: Systemwide crypto policies are applied on application startup. It is recommended to restart the system for the change of policies to fully take place.Verify the SSH server is configured to use only MACs employing FIPS 140-3 approved algorithms. -MACs hmac-sha2-256-etm@openssh.com,hmac-sha1-etm@openssh.com,umac-128-etm@openssh.com,hmac-sha2-512-etm@openssh.com,hmac-sha2-256,hmac-sha1,umac-128@openssh.com,hmac-sha2-512 +To verify the MACs in the systemwide SSH configuration file, use the following command: -A reboot is required for the changes to take effect.Verify SSH server is configured to use only ciphers employing FIPS 140-3 approved algorithms with the following command: +$ sudo grep -i MACs /etc/crypto-policies/back-ends/opensshserver.config -$ sudo grep -i macs /etc/crypto-policies/back-ends/openssh.config -MACs hmac-sha2-256-etm@openssh.com,hmac-sha1-etm@openssh.com,umac-128-etm@openssh.com,hmac-sha2-512-etm@openssh.com,hmac-sha2-256,hmac-sha1,umac-128@openssh.com,hmac-sha2-512 +MACs hmac-sha2-256-etm@openssh.com,hmac-sha2-512-etm@openssh.com,hmac-sha2-256,hmac-sha2-512 -If the MACs entries in the "openssh.config" file have any hashes other than "hmac-sha2-256-etm@openssh.com,hmac-sha2-256,hmac-sha2-512-etm@openssh.com,hmac-sha2-512", the order differs from the example above, or they are missing or commented out, this is a finding.SRG-OS-000480-GPOS-00229<GroupDescription></GroupDescription>RHEL-09-255080RHEL 9 must not allow a noncertificate trusted host SSH logon to the system.<VulnDiscussion>SSH trust relationships mean a compromise on one host can allow an attacker to move trivially to other hosts.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000366To configure RHEL 9 to not allow a noncertificate trusted host SSH logon to the system add or modify the following line in "/etc/ssh/sshd_config". +If the MACs entries in the "opensshserver.config" file have any hashes other than "hmac-sha2-256-etm@openssh.com,hmac-sha2-512-etm@openssh.com,hmac-sha2-256,hmac-sha2-512", or they are missing or commented out, this is a finding.SRG-OS-000480-GPOS-00229<GroupDescription></GroupDescription>RHEL-09-255080RHEL 9 must not allow a noncertificate trusted host SSH logon to the system.<VulnDiscussion>SSH trust relationships mean a compromise on one host can allow an attacker to move trivially to other hosts.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000366To configure RHEL 9 to not allow a noncertificate trusted host SSH logon to the system, add or modify the following line in "/etc/ssh/sshd_config" or in a file in "/etc/ssh/sshd_config.d". HostbasedAuthentication no Restart the SSH daemon for the settings to take effect: -$ sudo systemctl restart sshd.serviceVerify the operating system does not allow a noncertificate trusted host SSH logon to the system with the following command: +$ sudo systemctl restart sshd.serviceVerify the operating system does not allow a noncertificate trusted host SSH logon to the system with the following command: $ sudo /usr/sbin/sshd -dd 2>&1 | awk '/filename/ {print $4}' | tr -d '\r' | tr '\n' ' ' | xargs sudo grep -iH '^\s*hostbasedauthentication' @@ -2904,15 +2977,13 @@ HostbasedAuthentication no If the "HostbasedAuthentication" keyword is not set to "no", is missing, or is commented out, this is a finding. -If the required value is not set, this is a finding.SRG-OS-000480-GPOS-00229<GroupDescription></GroupDescription>RHEL-09-255085RHEL 9 must not allow users to override SSH environment variables.<VulnDiscussion>SSH environment options potentially allow users to bypass access restriction in some configurations.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000366Configure the RHEL 9 SSH daemon to not allow unattended or automatic logon to the system. - -Add or edit the following line in the "/etc/ssh/sshd_config" file: +If the required value is not set, this is a finding.SRG-OS-000480-GPOS-00229<GroupDescription></GroupDescription>RHEL-09-255085RHEL 9 must not allow users to override SSH environment variables.<VulnDiscussion>SSH environment options potentially allow users to bypass access restriction in some configurations.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000366Configure the RHEL 9 SSH daemon to not allow unattended or automatic logon to the system by editing the following line in the "/etc/ssh/sshd_config" or in a file in "/etc/ssh/sshd_config.d": PermitUserEnvironment no Restart the SSH daemon for the setting to take effect: -$ sudo systemctl restart sshd.serviceVerify that unattended or automatic logon via SSH is disabled with the following command: +$ sudo systemctl restart sshd.serviceVerify that unattended or automatic logon via SSH is disabled with the following command: $ sudo /usr/sbin/sshd -dd 2>&1 | awk '/filename/ {print $4}' | tr -d '\r' | tr '\n' ' ' | xargs sudo grep -iH '^\s*permituserenvironment' @@ -2920,7 +2991,7 @@ PermitUserEnvironment no If "PermitUserEnvironment" is set to "yes", is missing completely, or is commented out, this is a finding. -If the required value is not set, this is a finding.SRG-OS-000423-GPOS-00187<GroupDescription></GroupDescription>RHEL-09-255090RHEL 9 must force a frequent session key renegotiation for SSH connections to the server.<VulnDiscussion>Without protection of the transmitted information, confidentiality and integrity may be compromised because unprotected communications can be intercepted and either read or altered. +If the required value is not set, this is a finding.SRG-OS-000423-GPOS-00187<GroupDescription></GroupDescription>RHEL-09-255090RHEL 9 must force a frequent session key renegotiation for SSH connections to the server.<VulnDiscussion>Without protection of the transmitted information, confidentiality and integrity may be compromised because unprotected communications can be intercepted and either read or altered. This requirement applies to both internal and external networks and all types of information system components from which information can be transmitted (e.g., servers, mobile devices, notebook computers, printers, copiers, scanners, and facsimile machines). Communication paths outside the physical protection of a controlled boundary are exposed to the possibility of interception and modification. @@ -2928,95 +2999,104 @@ Protecting the confidentiality and integrity of organizational information can b Session key regeneration limits the chances of a session key becoming compromised. -Satisfies: SRG-OS-000423-GPOS-00187, SRG-OS-000033-GPOS-00014, SRG-OS-000424-GPOS-00188</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000068CCI-002418CCI-002421Configure RHEL 9 to force a frequent session key renegotiation for SSH connections to the server by adding or modifying the following line in the "/etc/ssh/sshd_config" file: +Satisfies: SRG-OS-000423-GPOS-00187, SRG-OS-000033-GPOS-00014, SRG-OS-000424-GPOS-00188</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000068CCI-002418CCI-002421Configure RHEL 9 to force a frequent session key renegotiation for SSH connections to the server by adding or modifying the following line in the "/etc/ssh/sshd_config" or in a file in "/etc/ssh/sshd_config.d": RekeyLimit 1G 1h Restart the SSH daemon for the settings to take effect. -$ sudo systemctl restart sshd.serviceVerify the SSH server is configured to force frequent session key renegotiation with the following command: +$ sudo systemctl restart sshd.serviceVerify the SSH server is configured to force frequent session key renegotiation with the following command: $ sudo /usr/sbin/sshd -dd 2>&1 | awk '/filename/ {print $4}' | tr -d '\r' | tr '\n' ' ' | xargs sudo grep -iH '^\s*rekeylimit' RekeyLimit 1G 1h -If "RekeyLimit" does not have a maximum data amount and maximum time defined, is missing, or is commented out, this is a finding.SRG-OS-000163-GPOS-00072<GroupDescription></GroupDescription>RHEL-09-255095RHEL 9 must be configured so that all network connections associated with SSH traffic terminate after becoming unresponsive.<VulnDiscussion>Terminating an unresponsive SSH session within a short time period reduces the window of opportunity for unauthorized personnel to take control of a management session enabled on the console or console port that has been left unattended. In addition, quickly terminating an idle SSH session will also free up resources committed by the managed network element. +If "RekeyLimit" does not have a maximum data amount and maximum time defined, is missing, or is commented out, this is a finding.SRG-OS-000163-GPOS-00072<GroupDescription></GroupDescription>RHEL-09-255095RHEL 9 must be configured so that all network connections associated with SSH traffic terminate after becoming unresponsive.<VulnDiscussion>Terminating an unresponsive SSH session within a short time period reduces the window of opportunity for unauthorized personnel to take control of a management session enabled on the console or console port that has been left unattended. In addition, quickly terminating an idle SSH session will also free up resources committed by the managed network element. Terminating network connections associated with communications sessions includes, for example, deallocating associated TCP/IP address/port pairs at the operating system level and deallocating networking assignments at the application level if multiple application sessions are using a single operating system-level network connection. This does not mean the operating system terminates all sessions or network access; it only ends the unresponsive session and releases the resources associated with that session. RHEL 9 utilizes /etc/ssh/sshd_config for configurations of OpenSSH. Within the sshd_config, the product of the values of "ClientAliveInterval" and "ClientAliveCountMax" are used to establish the inactivity threshold. The "ClientAliveInterval" is a timeout interval in seconds, after which if no data has been received from the client, sshd will send a message through the encrypted channel to request a response from the client. The "ClientAliveCountMax" is the number of client alive messages that may be sent without sshd receiving any messages back from the client. If this threshold is met, sshd will disconnect the client. For more information on these settings and others, refer to the sshd_config man pages. -Satisfies: SRG-OS-000163-GPOS-00072, SRG-OS-000279-GPOS-00109</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-001133CCI-002361Note: This setting must be applied in conjunction with RHEL-09-255100 to function correctly. +Satisfies: SRG-OS-000163-GPOS-00072, SRG-OS-000279-GPOS-00109</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-001133CCI-002361Note: This setting must be applied in conjunction with RHEL-09-255100 to function correctly. Configure the SSH server to terminate a user session automatically after the SSH client has become unresponsive. -Modify or append the following lines in the "/etc/ssh/sshd_config" file: +Modify or append the following lines in the "/etc/ssh/sshd_config" or in a file in "/etc/ssh/sshd_config.d": ClientAliveCountMax 1 -In order for the changes to take effect, the SSH daemon must be restarted. +For the changes to take effect, the SSH daemon must be restarted. -$ sudo systemctl restart sshd.serviceVerify the "ClientAliveCountMax" is set to "1" by performing the following command: +$ sudo systemctl restart sshd.serviceVerify the "ClientAliveCountMax" is set to "1" by performing the following command: $ sudo /usr/sbin/sshd -dd 2>&1 | awk '/filename/ {print $4}' | tr -d '\r' | tr '\n' ' ' | xargs sudo grep -iH '^\s*clientalivecountmax' ClientAliveCountMax 1 -If "ClientAliveCountMax" does not exist, is not set to a value of "1" in "/etc/ssh/sshd_config", or is commented out, this is a finding.SRG-OS-000126-GPOS-00066<GroupDescription></GroupDescription>RHEL-09-255100RHEL 9 must be configured so that all network connections associated with SSH traffic are terminated after 10 minutes of becoming unresponsive.<VulnDiscussion>Terminating an unresponsive SSH session within a short time period reduces the window of opportunity for unauthorized personnel to take control of a management session enabled on the console or console port that has been left unattended. In addition, quickly terminating an idle SSH session will also free up resources committed by the managed network element. +If "ClientAliveCountMax" does not exist, is not set to a value of "1" in "/etc/ssh/sshd_config", or is commented out, this is a finding.SRG-OS-000126-GPOS-00066<GroupDescription></GroupDescription>RHEL-09-255100RHEL 9 must be configured so that all network connections associated with SSH traffic are terminated after 10 minutes of becoming unresponsive.<VulnDiscussion>Terminating an unresponsive SSH session within a short time period reduces the window of opportunity for unauthorized personnel to take control of a management session enabled on the console or console port that has been left unattended. In addition, quickly terminating an idle SSH session will also free up resources committed by the managed network element. Terminating network connections associated with communications sessions includes, for example, deallocating associated TCP/IP address/port pairs at the operating system level and deallocating networking assignments at the application level if multiple application sessions are using a single operating system-level network connection. This does not mean the operating system terminates all sessions or network access; it only ends the unresponsive session and releases the resources associated with that session. RHEL 9 utilizes /etc/ssh/sshd_config for configurations of OpenSSH. Within the sshd_config, the product of the values of "ClientAliveInterval" and "ClientAliveCountMax" are used to establish the inactivity threshold. The "ClientAliveInterval" is a timeout interval in seconds, after which if no data has been received from the client, sshd will send a message through the encrypted channel to request a response from the client. The "ClientAliveCountMax" is the number of client alive messages that may be sent without sshd receiving any messages back from the client. If this threshold is met, sshd will disconnect the client. For more information on these settings and others, refer to the sshd_config man pages. -Satisfies: SRG-OS-000126-GPOS-00066, SRG-OS-000163-GPOS-00072, SRG-OS-000279-GPOS-00109, SRG-OS-000395-GPOS-00175</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-001133CCI-002361CCI-002891Note: This setting must be applied in conjunction with RHEL-09-255095 to function correctly. +Satisfies: SRG-OS-000126-GPOS-00066, SRG-OS-000163-GPOS-00072, SRG-OS-000279-GPOS-00109, SRG-OS-000395-GPOS-00175</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-001133CCI-002361CCI-002891Note: This setting must be applied in conjunction with RHEL-09-255095 to function correctly. Configure the SSH server to terminate a user session automatically after the SSH client has been unresponsive for 10 minutes. -Modify or append the following lines in the "/etc/ssh/sshd_config" file: +Modify or append the following lines in the "/etc/ssh/sshd_config" or in a file in "/etc/ssh/sshd_config.d": ClientAliveInterval 600 -In order for the changes to take effect, the SSH daemon must be restarted. +For the changes to take effect, the SSH daemon must be restarted. -$ sudo systemctl restart sshd.serviceVerify the "ClientAliveInterval" variable is set to a value of "600" or less by performing the following command: +$ sudo systemctl restart sshd.serviceVerify the "ClientAliveInterval" variable is set to a value of "600" or less by performing the following command: $ sudo /usr/sbin/sshd -dd 2>&1 | awk '/filename/ {print $4}' | tr -d '\r' | tr '\n' ' ' | xargs sudo grep -iH '^\s*clientaliveinterval' ClientAliveInterval 600 -If "ClientAliveInterval" does not exist, does not have a value of "600" or less in "/etc/ssh/sshd_config", or is commented out, this is a finding.SRG-OS-000480-GPOS-00227<GroupDescription></GroupDescription>RHEL-09-255105RHEL 9 SSH server configuration file must be group-owned by root.<VulnDiscussion>Service configuration files enable or disable features of their respective services, which if configured incorrectly, can lead to insecure and vulnerable configurations. Therefore, service configuration files must be owned by the correct group to prevent unauthorized changes.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000366Configure the "/etc/ssh/sshd_config" file to be group-owned by root with the following command: +If "ClientAliveInterval" does not exist, does not have a value of "600" or less in "/etc/ssh/sshd_config", or is commented out, this is a finding.SRG-OS-000480-GPOS-00227<GroupDescription></GroupDescription>RHEL-09-255105RHEL 9 SSH server configuration file must be group-owned by root.<VulnDiscussion>Service configuration files enable or disable features of their respective services, which if configured incorrectly, can lead to insecure and vulnerable configurations. Therefore, service configuration files must be owned by the correct group to prevent unauthorized changes.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000366Configure the "/etc/ssh/sshd_config" file to be group-owned by root with the following command: -$ sudo chgrp root /etc/ssh/sshd_configVerify the group ownership of the "/etc/ssh/sshd_config" file with the following command: +$ sudo chgrp root /etc/ssh/sshd_configVerify the group ownership of the "/etc/ssh/sshd_config" file and the contents of "/etc/ssh/sshd_config.d" with the following command: -$ ls -al /etc/ssh/sshd_config +$ sudo find /etc/ssh/sshd_config /etc/ssh/sshd_config.d -exec stat -c "%G %n" {} \; -rw-------. 1 root root 3669 Feb 22 11:34 /etc/ssh/sshd_config +root /etc/ssh/sshd_config +root /etc/ssh/sshd_config.d +root /etc/ssh/sshd_config.d/50-cloud-init.conf +root /etc/ssh/sshd_config.d/50-redhat.conf -If the "/etc/ssh/sshd_config" file does not have a group owner of "root", this is a finding.SRG-OS-000480-GPOS-00227<GroupDescription></GroupDescription>RHEL-09-255110RHEL 9 SSH server configuration file must be owned by root.<VulnDiscussion>Service configuration files enable or disable features of their respective services, which if configured incorrectly, can lead to insecure and vulnerable configurations. Therefore, service configuration files must be owned by the correct group to prevent unauthorized changes.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000366Configure the "/etc/ssh/sshd_config" file to be owned by root with the following command: +If the "/etc/ssh/sshd_config" file or "/etc/ssh/sshd_config.d" or any files in the sshd_config.d directory do not have a group owner of "root", this is a finding.SRG-OS-000480-GPOS-00227<GroupDescription></GroupDescription>RHEL-09-255110RHEL 9 SSH server configuration file must be owned by root.<VulnDiscussion>Service configuration files enable or disable features of their respective services, which if configured incorrectly, can lead to insecure and vulnerable configurations. Therefore, service configuration files must be owned by the correct group to prevent unauthorized changes.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000366Configure the "/etc/ssh/sshd_config" file to be owned by root with the following command: -$ sudo chown root /etc/ssh/sshd_configVerify the ownership of the "/etc/ssh/sshd_config" file with the following command: +$ sudo chown root /etc/ssh/sshd_configVerify the ownership of the "/etc/ssh/sshd_config" file with the following command: -$ ls -al /etc/ssh/sshd_config +$ sudo find /etc/ssh/sshd_config /etc/ssh/sshd_config.d -exec stat -c "%U %n" {} \; -rw-------. 1 root root 3669 Feb 22 11:34 /etc/ssh/sshd_config +root /etc/ssh/sshd_config +root /etc/ssh/sshd_config.d +root /etc/ssh/sshd_config.d/50-cloud-init.conf +root /etc/ssh/sshd_config.d/50-redhat.conf -If the "/etc/ssh/sshd_config" file does not have an owner of "root", this is a finding.SRG-OS-000480-GPOS-00227<GroupDescription></GroupDescription>RHEL-09-255115RHEL 9 SSH server configuration file must have mode 0600 or less permissive.<VulnDiscussion>Service configuration files enable or disable features of their respective services that if configured incorrectly can lead to insecure and vulnerable configurations. Therefore, service configuration files should be owned by the correct group to prevent unauthorized changes.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000366Configure the "/etc/ssh/sshd_config" permissions to be "0600" with the following command: +If the "/etc/ssh/sshd_config" file or "/etc/ssh/sshd_config.d" or any files in the sshd_config.d directory do not have an owner of "root", this is a finding.SRG-OS-000480-GPOS-00227<GroupDescription></GroupDescription>RHEL-09-255115RHEL 9 SSH server configuration file must have mode 0600 or less permissive.<VulnDiscussion>Service configuration files enable or disable features of their respective services that if configured incorrectly can lead to insecure and vulnerable configurations. Therefore, service configuration files should be owned by the correct group to prevent unauthorized changes.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000366Configure the "/etc/ssh/sshd_config" permissions to be "0600" with the following command: -$ sudo chmod 0600 /etc/ssh/sshd_configVerify the permissions of the "/etc/ssh/sshd_config" file with the following command: +$ sudo chmod 0600 /etc/ssh/sshd_configVerify the permissions of the "/etc/ssh/sshd_config" file with the following command: -$ ls -al /etc/ssh/sshd_config +$ sudo find /etc/ssh/sshd_config /etc/ssh/sshd_config.d -exec stat -c "%a %n" {} \; -rw-------. 1 root root 3669 Feb 22 11:34 /etc/ssh/sshd_config +600 /etc/ssh/sshd_config +700 /etc/ssh/sshd_config.d +600 /etc/ssh/sshd_config.d/50-cloud-init.conf +600 /etc/ssh/sshd_config.d/50-redhat.conf -If the "/etc/ssh/sshd_config" permissions are not "0600", this is a finding.SRG-OS-000480-GPOS-00227<GroupDescription></GroupDescription>RHEL-09-255120RHEL 9 SSH private host key files must have mode 0640 or less permissive.<VulnDiscussion>If an unauthorized user obtains the private SSH host key file, the host could be impersonated.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000366Configure the mode of SSH private host key files under "/etc/ssh" to "0640" with the following command: +If the "/etc/ssh/sshd_config" permissions are not "0600", this is a finding.SRG-OS-000480-GPOS-00227<GroupDescription></GroupDescription>RHEL-09-255120RHEL 9 SSH private host key files must have mode 0640 or less permissive.<VulnDiscussion>If an unauthorized user obtains the private SSH host key file, the host could be impersonated.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000366Configure the mode of SSH private host key files under "/etc/ssh" to "0640" with the following command: $ sudo chmod 0640 /etc/ssh/ssh_host*key Restart the SSH daemon for the changes to take effect: -$ sudo systemctl restart sshd.serviceVerify the SSH private host key files have a mode of "0640" or less permissive with the following command: +$ sudo systemctl restart sshd.serviceVerify the SSH private host key files have a mode of "0640" or less permissive with the following command: -$ ls -l /etc/ssh/*_key +$ stat -c "%a %n" /etc/ssh/*_key 640 /etc/ssh/ssh_host_dsa_key 640 /etc/ssh/ssh_host_ecdsa_key @@ -3054,17 +3134,17 @@ $ sudo /usr/sbin/sshd -dd 2>&1 | awk '/filename/ {print $4}' | tr -d '\r' Compression delayed -If the "Compression" keyword is set to "yes", is missing, or the returned line is commented out, this is a finding.SRG-OS-000364-GPOS-00151<GroupDescription></GroupDescription>RHEL-09-255135RHEL 9 SSH daemon must not allow GSSAPI authentication.<VulnDiscussion>Generic Security Service Application Program Interface (GSSAPI) authentication is used to provide additional authentication mechanisms to applications. Allowing GSSAPI authentication through SSH exposes the system's GSSAPI to remote hosts, increasing the attack surface of the system. +If the "Compression" keyword is set to "yes", is missing, or the returned line is commented out, this is a finding.SRG-OS-000364-GPOS-00151<GroupDescription></GroupDescription>RHEL-09-255135RHEL 9 SSH daemon must not allow GSSAPI authentication.<VulnDiscussion>Generic Security Service Application Program Interface (GSSAPI) authentication is used to provide additional authentication mechanisms to applications. Allowing GSSAPI authentication through SSH exposes the system's GSSAPI to remote hosts, increasing the attack surface of the system. -Satisfies: SRG-OS-000364-GPOS-00151, SRG-OS-000480-GPOS-00227</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000366CCI-001813Configure the SSH daemon to not allow GSSAPI authentication. +Satisfies: SRG-OS-000364-GPOS-00151, SRG-OS-000480-GPOS-00227</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-001813Configure the SSH daemon to not allow GSSAPI authentication. -Add the following line in "/etc/ssh/sshd_config", or uncomment the line and set the value to "no": +Add or uncomment the following line to "/etc/ssh/sshd_config" or to a file in "/etc/ssh/sshd_config.d" and set the value to "no": GSSAPIAuthentication no The SSH service must be restarted for changes to take effect: -$ sudo systemctl restart sshd.serviceVerify the SSH daemon does not allow GSSAPI authentication with the following command: +$ sudo systemctl restart sshd.serviceVerify the SSH daemon does not allow GSSAPI authentication with the following command: $ sudo /usr/sbin/sshd -dd 2>&1 | awk '/filename/ {print $4}' | tr -d '\r' | tr '\n' ' ' | xargs sudo grep -iH '^\s*gssapiauthentication' @@ -3072,101 +3152,101 @@ GSSAPIAuthentication no If the value is returned as "yes", the returned line is commented out, no output is returned, and the use of GSSAPI authentication has not been documented with the information system security officer (ISSO), this is a finding. -If the required value is not set, this is a finding.SRG-OS-000364-GPOS-00151<GroupDescription></GroupDescription>RHEL-09-255140RHEL 9 SSH daemon must not allow Kerberos authentication.<VulnDiscussion>Kerberos authentication for SSH is often implemented using Generic Security Service Application Program Interface (GSSAPI). If Kerberos is enabled through SSH, the SSH daemon provides a means of access to the system's Kerberos implementation. Vulnerabilities in the system's Kerberos implementations may be subject to exploitation. +If the required value is not set, this is a finding.SRG-OS-000364-GPOS-00151<GroupDescription></GroupDescription>RHEL-09-255140RHEL 9 SSH daemon must not allow Kerberos authentication.<VulnDiscussion>Kerberos authentication for SSH is often implemented using Generic Security Service Application Program Interface (GSSAPI). If Kerberos is enabled through SSH, the SSH daemon provides a means of access to the system's Kerberos implementation. Vulnerabilities in the system's Kerberos implementations may be subject to exploitation. -Satisfies: SRG-OS-000364-GPOS-00151, SRG-OS-000480-GPOS-00227</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000366CCI-001813Configure the SSH daemon to not allow Kerberos authentication. +Satisfies: SRG-OS-000364-GPOS-00151, SRG-OS-000480-GPOS-00227</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-001813Configure the SSH daemon to not allow Kerberos authentication. -Add the following line in "/etc/ssh/sshd_config", or uncomment the line and set the value to "no": +Add the following line in "/etc/ssh/sshd_config" or to a file in "/etc/ssh/sshd_config.d", or uncomment the line and set the value to "no": KerberosAuthentication no The SSH service must be restarted for changes to take effect: -$ sudo systemctl restart sshd.serviceVerify the SSH daemon does not allow Kerberos authentication with the following command: +$ sudo systemctl restart sshd.serviceVerify the SSH daemon does not allow Kerberos authentication with the following command: $ sudo /usr/sbin/sshd -dd 2>&1 | awk '/filename/ {print $4}' | tr -d '\r' | tr '\n' ' ' | xargs sudo grep -iH '^\s*kerberosauthentication' KerberosAuthentication no -If the value is returned as "yes", the returned line is commented out, no output is returned, and the use of Kerberos authentication has not been documented with the information system security officer (ISSO), this is a finding.SRG-OS-000480-GPOS-00227<GroupDescription></GroupDescription>RHEL-09-255145RHEL 9 SSH daemon must not allow rhosts authentication.<VulnDiscussion>SSH trust relationships mean a compromise on one host can allow an attacker to move trivially to other hosts.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000366Configure the SSH daemon to not allow rhosts authentication. +If the value is returned as "yes", the returned line is commented out, no output is returned, and the use of Kerberos authentication has not been documented with the information system security officer (ISSO), this is a finding.SRG-OS-000480-GPOS-00227<GroupDescription></GroupDescription>RHEL-09-255145RHEL 9 SSH daemon must not allow rhosts authentication.<VulnDiscussion>SSH trust relationships mean a compromise on one host can allow an attacker to move trivially to other hosts.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000366Configure the SSH daemon to not allow rhosts authentication. -Add the following line in "/etc/ssh/sshd_config", or uncomment the line and set the value to "yes": +Add the following line to "/etc/ssh/sshd_config" or to a file in "/etc/ssh/sshd_config.d", or uncomment the line and set the value to "yes": IgnoreRhosts yes The SSH service must be restarted for changes to take effect: -$ sudo systemctl restart sshd.serviceVerify the SSH daemon does not allow rhosts authentication with the following command: +$ sudo systemctl restart sshd.serviceVerify the SSH daemon does not allow rhosts authentication with the following command: $ sudo /usr/sbin/sshd -dd 2>&1 | awk '/filename/ {print $4}' | tr -d '\r' | tr '\n' ' ' | xargs sudo grep -iH '^\s*ignorerhosts' IgnoreRhosts yes -If the value is returned as "no", the returned line is commented out, or no output is returned, this is a finding.SRG-OS-000480-GPOS-00227<GroupDescription></GroupDescription>RHEL-09-255150RHEL 9 SSH daemon must not allow known hosts authentication.<VulnDiscussion>Configuring the IgnoreUserKnownHosts setting for the SSH daemon provides additional assurance that remote login via SSH will require a password, even in the event of misconfiguration elsewhere.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000366Configure the SSH daemon to not allow known hosts authentication. +If the value is returned as "no", the returned line is commented out, or no output is returned, this is a finding.SRG-OS-000480-GPOS-00227<GroupDescription></GroupDescription>RHEL-09-255150RHEL 9 SSH daemon must not allow known hosts authentication.<VulnDiscussion>Configuring the IgnoreUserKnownHosts setting for the SSH daemon provides additional assurance that remote login via SSH will require a password, even in the event of misconfiguration elsewhere.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000366Configure the SSH daemon to not allow known hosts authentication. -Add the following line in "/etc/ssh/sshd_config", or uncomment the line and set the value to "yes": +Add the following line to "/etc/ssh/sshd_config" or to a file in "/etc/ssh/sshd_config.d", or uncomment the line and set the value to "yes": IgnoreUserKnownHosts yes The SSH service must be restarted for changes to take effect: -$ sudo systemctl restart sshd.serviceVerify the SSH daemon does not allow known hosts authentication with the following command: +$ sudo systemctl restart sshd.serviceVerify the SSH daemon does not allow known hosts authentication with the following command: $ sudo /usr/sbin/sshd -dd 2>&1 | awk '/filename/ {print $4}' | tr -d '\r' | tr '\n' ' ' | xargs sudo grep -iH '^\s*ignoreuserknownhosts' IgnoreUserKnownHosts yes -If the value is returned as "no", the returned line is commented out, or no output is returned, this is a finding.SRG-OS-000480-GPOS-00227<GroupDescription></GroupDescription>RHEL-09-255155RHEL 9 SSH daemon must disable remote X connections for interactive users.<VulnDiscussion>When X11 forwarding is enabled, there may be additional exposure to the server and client displays if the sshd proxy display is configured to listen on the wildcard address. By default, sshd binds the forwarding server to the loopback address and sets the hostname part of the DISPLAY environment variable to localhost. This prevents remote hosts from connecting to the proxy display.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000366Configure the SSH daemon to not allow X11 forwarding. +If the value is returned as "no", the returned line is commented out, or no output is returned, this is a finding.SRG-OS-000480-GPOS-00227<GroupDescription></GroupDescription>RHEL-09-255155RHEL 9 SSH daemon must disable remote X connections for interactive users.<VulnDiscussion>When X11 forwarding is enabled, there may be additional exposure to the server and client displays if the sshd proxy display is configured to listen on the wildcard address. By default, sshd binds the forwarding server to the loopback address and sets the hostname part of the DISPLAY environment variable to localhost. This prevents remote hosts from connecting to the proxy display.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000366Configure the SSH daemon to not allow X11 forwarding. -Add the following line in "/etc/ssh/sshd_config", or uncomment the line and set the value to "no": +Add the following line to "/etc/ssh/sshd_config" or to a file in "/etc/ssh/sshd_config.d", or uncomment the line and set the value to "no": X11forwarding no The SSH service must be restarted for changes to take effect: -$ sudo systemctl restart sshd.serviceVerify the SSH daemon does not allow X11Forwarding with the following command: +$ sudo systemctl restart sshd.serviceVerify the SSH daemon does not allow X11Forwarding with the following command: $ sudo /usr/sbin/sshd -dd 2>&1 | awk '/filename/ {print $4}' | tr -d '\r' | tr '\n' ' ' | xargs sudo grep -iH '^\s*x11forwarding' X11forwarding no -If the value is returned as "yes", the returned line is commented out, or no output is returned, and X11 forwarding is not documented with the information system security officer (ISSO) as an operational requirement, this is a finding.SRG-OS-000480-GPOS-00227<GroupDescription></GroupDescription>RHEL-09-255160RHEL 9 SSH daemon must perform strict mode checking of home directory configuration files.<VulnDiscussion>If other users have access to modify user-specific SSH configuration files, they may be able to log into the system as another user.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000366Configure the SSH daemon to perform strict mode checking of home directory configuration files. +If the value is returned as "yes", the returned line is commented out, or no output is returned, and X11 forwarding is not documented with the information system security officer (ISSO) as an operational requirement, this is a finding.SRG-OS-000480-GPOS-00227<GroupDescription></GroupDescription>RHEL-09-255160RHEL 9 SSH daemon must perform strict mode checking of home directory configuration files.<VulnDiscussion>If other users have access to modify user-specific SSH configuration files, they may be able to log into the system as another user.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000366Configure the SSH daemon to perform strict mode checking of home directory configuration files. -Add the following line in "/etc/ssh/sshd_config", or uncomment the line and set the value to "yes": +Add the following line to "/etc/ssh/sshd_config" or to a file in "/etc/ssh/sshd_config.d", or uncomment the line and set the value to "yes": StrictModes yes The SSH service must be restarted for changes to take effect: -$ sudo systemctl restart sshd.serviceVerify the SSH daemon performs strict mode checking of home directory configuration files with the following command: +$ sudo systemctl restart sshd.serviceVerify the SSH daemon performs strict mode checking of home directory configuration files with the following command: $ sudo /usr/sbin/sshd -dd 2>&1 | awk '/filename/ {print $4}' | tr -d '\r' | tr '\n' ' ' | xargs sudo grep -iH '^\s*strictmodes' StrictModes yes -If the "StrictModes" keyword is set to "no", the returned line is commented out, or no output is returned, this is a finding.SRG-OS-000480-GPOS-00227<GroupDescription></GroupDescription>RHEL-09-255165RHEL 9 SSH daemon must display the date and time of the last successful account logon upon an SSH logon.<VulnDiscussion>Providing users feedback on when account accesses last occurred facilitates user recognition and reporting of unauthorized account use.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000366Configure the SSH daemon to provide users with feedback on when account accesses last occurred. +If the "StrictModes" keyword is set to "no", the returned line is commented out, or no output is returned, this is a finding.SRG-OS-000480-GPOS-00227<GroupDescription></GroupDescription>RHEL-09-255165RHEL 9 SSH daemon must display the date and time of the last successful account logon upon an SSH logon.<VulnDiscussion>Providing users feedback on when account accesses last occurred facilitates user recognition and reporting of unauthorized account use.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000366Configure the SSH daemon to provide users with feedback on when account accesses last occurred. -Add the following line in "/etc/ssh/sshd_config", or uncomment the line and set the value to "yes": +Add the following line to "/etc/ssh/sshd_config" or to a file in "/etc/ssh/sshd_config.d", or uncomment the line and set the value to "yes": PrintLastLog yes The SSH service must be restarted for changes to take effect: -$ sudo systemctl restart sshd.serviceVerify the SSH daemon provides users with feedback on when account accesses last occurred with the following command: +$ sudo systemctl restart sshd.serviceVerify the SSH daemon provides users with feedback on when account accesses last occurred with the following command: $ sudo /usr/sbin/sshd -dd 2>&1 | awk '/filename/ {print $4}' | tr -d '\r' | tr '\n' ' ' | xargs sudo grep -iH '^\s*printlastlog' PrintLastLog yes -If the "PrintLastLog" keyword is set to "no", the returned line is commented out, or no output is returned, this is a finding.SRG-OS-000480-GPOS-00227<GroupDescription></GroupDescription>RHEL-09-255175RHEL 9 SSH daemon must prevent remote hosts from connecting to the proxy display.<VulnDiscussion>When X11 forwarding is enabled, there may be additional exposure to the server and client displays if the sshd proxy display is configured to listen on the wildcard address. By default, sshd binds the forwarding server to the loopback address and sets the hostname part of the "DISPLAY" environment variable to localhost. This prevents remote hosts from connecting to the proxy display.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000366Configure the SSH daemon to prevent remote hosts from connecting to the proxy display. +If the "PrintLastLog" keyword is set to "no", the returned line is commented out, or no output is returned, this is a finding.SRG-OS-000480-GPOS-00227<GroupDescription></GroupDescription>RHEL-09-255175RHEL 9 SSH daemon must prevent remote hosts from connecting to the proxy display.<VulnDiscussion>When X11 forwarding is enabled, there may be additional exposure to the server and client displays if the sshd proxy display is configured to listen on the wildcard address. By default, sshd binds the forwarding server to the loopback address and sets the hostname part of the "DISPLAY" environment variable to localhost. This prevents remote hosts from connecting to the proxy display.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000366Configure the SSH daemon to prevent remote hosts from connecting to the proxy display. -Add the following line in "/etc/ssh/sshd_config", or uncomment the line and set the value to "yes": +Add the following line to "/etc/ssh/sshd_config" or to a file in "/etc/ssh/sshd_config.d", or uncomment the line and set the value to "yes": X11UseLocalhost yes The SSH service must be restarted for changes to take effect: -$ sudo systemctl restart sshd.serviceVerify the SSH daemon prevents remote hosts from connecting to the proxy display with the following command: +$ sudo systemctl restart sshd.serviceVerify the SSH daemon prevents remote hosts from connecting to the proxy display with the following command: $ sudo /usr/sbin/sshd -dd 2>&1 | awk '/filename/ {print $4}' | tr -d '\r' | tr '\n' ' ' | xargs sudo grep -iH '^\s*x11uselocalhost' @@ -3200,43 +3280,35 @@ $ gsettings get org.gnome.login-screen banner-message-enable true -If the result is "false", this is a finding.SRG-OS-000023-GPOS-00006<GroupDescription></GroupDescription>RHEL-09-271015RHEL 9 must prevent a user from overriding the banner-message-enable setting for the graphical user interface.<VulnDiscussion>Display of a standardized and approved use notification before granting access to the operating system ensures privacy and security notification verbiage used is consistent with applicable federal laws, Executive Orders, directives, policies, regulations, standards, and guidance. +If the result is "false", this is a finding.SRG-OS-000023-GPOS-00006<GroupDescription></GroupDescription>RHEL-09-271015RHEL 9 must prevent a user from overriding the banner-message-enable setting for the graphical user interface.<VulnDiscussion>Display of a standardized and approved use notification before granting access to the operating system ensures privacy and security notification verbiage used is consistent with applicable federal laws, Executive Orders, directives, policies, regulations, standards, and guidance. For U.S. Government systems, system use notifications are required only for access via login interfaces with human users and are not required when such human interfaces do not exist. -Satisfies: SRG-OS-000023-GPOS-00006, SRG-OS-000228-GPOS-00088</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000048CCI-001384CCI-001385CCI-001386CCI-001387CCI-001388Configure RHEL 9 to prevent a user from overriding the banner setting for graphical user interfaces. +Satisfies: SRG-OS-000023-GPOS-00006, SRG-OS-000228-GPOS-00088</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000048CCI-001384CCI-001385CCI-001386CCI-001387CCI-001388Configure RHEL 9 to prevent a user from overriding the banner setting for graphical user interfaces. -Create a database to contain the system-wide graphical user logon settings (if it does not already exist) with the following command: +Create a database to contain the systemwide graphical user logon settings (if it does not already exist) with the following command: $ sudo touch /etc/dconf/db/local.d/locks/session Add the following setting to prevent nonprivileged users from modifying it: -banner-message-enable +/org/gnome/login-screen/banner-message-enable Run the following command to update the database: -$ sudo dconf updateVerify RHEL 9 prevents a user from overriding settings for graphical user interfaces. - -Note: This requirement assumes the use of the RHEL 9 default graphical user interface, the GNOME desktop environment. If the system does not have any graphical user interface installed, this requirement is Not Applicable. - -Determine which profile the system database is using with the following command: - -$ sudo grep system-db /etc/dconf/profile/user - -system-db:local - -Check that graphical settings are locked from nonprivileged user modification with the following command: +$ sudo dconf updateNote: This requirement assumes the use of the RHEL 9 default graphical user interface, the GNOME desktop environment. If the system does not have any graphical user interface installed, this requirement is Not Applicable. -Note: The example below is using the database "local" for the system, so the path is "/etc/dconf/db/local.d". This path must be modified if a database other than "local" is being used. - -$ sudo grep banner-message-enable /etc/dconf/db/local.d/* - -/org/gnome/login-screen/banner-message-enable +Verify RHEL 9 prevents a user from overriding settings for graphical user interfaces. -If the output is not "/org/gnome/login-screen/banner-message-enable", the line is commented out, or the line is missing, this is a finding.SRG-OS-000114-GPOS-00059<GroupDescription></GroupDescription>RHEL-09-271020RHEL 9 must disable the graphical user interface automount function unless required.<VulnDiscussion>Automatically mounting file systems permits easy introduction of unknown devices, thereby facilitating malicious activity. +Determine if the org.gnome.login-screen banner-message-enable key is writable with the following command: + +$ gsettings writable org.gnome.login-screen banner-message-enable + +false + +If "banner-message-enable" is writable or the result is "true", this is a finding.SRG-OS-000114-GPOS-00059<GroupDescription></GroupDescription>RHEL-09-271020RHEL 9 must disable the graphical user interface automount function unless required.<VulnDiscussion>Automatically mounting file systems permits easy introduction of unknown devices, thereby facilitating malicious activity. -Satisfies: SRG-OS-000114-GPOS-00059, SRG-OS-000378-GPOS-00163, SRG-OS-000480-GPOS-00227</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000366CCI-000778CCI-001958Configure the GNOME desktop to disable automated mounting of removable media. +Satisfies: SRG-OS-000114-GPOS-00059, SRG-OS-000378-GPOS-00163, SRG-OS-000480-GPOS-00227</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000778CCI-001958Configure the GNOME desktop to disable automated mounting of removable media. The dconf settings can be edited in the /etc/dconf/db/* location. @@ -3247,17 +3319,17 @@ automount-open=false Then update the dconf system databases: -$ sudo dconf updateVerify RHEL 9 disables the graphical user interface automount function with the following command: +$ sudo dconf updateNote: This requirement assumes the use of the RHEL 9 default graphical user interface, the GNOME desktop environment. If the system does not have any graphical user interface installed, this requirement is Not Applicable. -Note: This requirement assumes the use of the RHEL 9 default graphical user interface, the GNOME desktop environment. If the system does not have any graphical user interface installed, this requirement is Not Applicable. +Verify RHEL 9 disables the graphical user interface automount function with the following command: $ gsettings get org.gnome.desktop.media-handling automount-open false -If "automount-open" is set to "true", and is not documented with the information system security officer (ISSO) as an operational requirement, this is a finding.SRG-OS-000114-GPOS-00059<GroupDescription></GroupDescription>RHEL-09-271025RHEL 9 must prevent a user from overriding the disabling of the graphical user interface automount function.<VulnDiscussion>A nonprivileged account is any operating system account with authorizations of a nonprivileged user. +If "automount-open" is set to "true", and is not documented with the information system security officer (ISSO) as an operational requirement, this is a finding.SRG-OS-000114-GPOS-00059<GroupDescription></GroupDescription>RHEL-09-271025RHEL 9 must prevent a user from overriding the disabling of the graphical user interface automount function.<VulnDiscussion>A nonprivileged account is any operating system account with authorizations of a nonprivileged user. -Satisfies: SRG-OS-000114-GPOS-00059, SRG-OS-000378-GPOS-00163, SRG-OS-000480-GPOS-00227</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000366CCI-000778CCI-001958Configure the GNOME desktop to not allow a user to change the setting that disables automated mounting of removable media. +Satisfies: SRG-OS-000114-GPOS-00059, SRG-OS-000378-GPOS-00163, SRG-OS-000480-GPOS-00227</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000778CCI-001958Configure the GNOME desktop to not allow a user to change the setting that disables automated mounting of removable media. Add the following line to "/etc/dconf/db/local.d/locks/00-security-settings-lock" to prevent user modification: @@ -3265,9 +3337,9 @@ Add the following line to "/etc/dconf/db/local.d/locks/00-security-settings-lock Then update the dconf system databases: -$ sudo dconf updateVerify RHEL 9 disables ability of the user to override the graphical user interface automount setting. +$ sudo dconf updateNote: This requirement assumes the use of the RHEL 9 default graphical user interface, the GNOME desktop environment. If the system does not have any graphical user interface installed, this requirement is Not Applicable. -Note: This requirement assumes the use of the RHEL 9 default graphical user interface, the GNOME desktop environment. If the system does not have any graphical user interface installed, this requirement is Not Applicable. +Verify RHEL 9 disables the ability of the user to override the graphical user interface automount setting. Determine which profile the system database is using with the following command: @@ -3302,9 +3374,9 @@ $ gsettings get org.gnome.desktop.media-handling autorun-never true -If "autorun-never" is set to "false", and is not documented with the information system security officer (ISSO) as an operational requirement, this is a finding.SRG-OS-000114-GPOS-00059<GroupDescription></GroupDescription>RHEL-09-271035RHEL 9 must prevent a user from overriding the disabling of the graphical user interface autorun function.<VulnDiscussion>Techniques used to address this include protocols using nonces (e.g., numbers generated for a specific one-time use) or challenges (e.g., TLS, WS_Security). Additional techniques include time-synchronous or challenge-response one-time authenticators. +If "autorun-never" is set to "false", and is not documented with the information system security officer (ISSO) as an operational requirement, this is a finding.SRG-OS-000114-GPOS-00059<GroupDescription></GroupDescription>RHEL-09-271035RHEL 9 must prevent a user from overriding the disabling of the graphical user interface autorun function.<VulnDiscussion>Techniques used to address this include protocols using nonces (e.g., numbers generated for a specific one-time use) or challenges (e.g., TLS, WS_Security). Additional techniques include time-synchronous or challenge-response one-time authenticators. -Satisfies: SRG-OS-000114-GPOS-00059, SRG-OS-000378-GPOS-00163, SRG-OS-000480-GPOS-00227</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000366CCI-000778CCI-001958Configure the GNOME desktop to not allow a user to change the setting that disables autorun on removable media. +Satisfies: SRG-OS-000114-GPOS-00059, SRG-OS-000378-GPOS-00163, SRG-OS-000480-GPOS-00227</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000778CCI-001958Configure the GNOME desktop to not allow a user to change the setting that disables autorun on removable media. Add the following line to "/etc/dconf/db/local.d/locks/00-security-settings-lock" to prevent user modification: @@ -3312,41 +3384,32 @@ Add the following line to "/etc/dconf/db/local.d/locks/00-security-settings-lock Then update the dconf system databases: -$ sudo dconf updateVerify RHEL 9 disables ability of the user to override the graphical user interface autorun setting. +$ sudo dconf updateNote: This requirement assumes the use of the RHEL 9 default graphical user interface, the GNOME desktop environment. If the system does not have any graphical user interface installed, this requirement is Not Applicable. -Note: This requirement assumes the use of the RHEL 9 default graphical user interface, the GNOME desktop environment. If the system does not have any graphical user interface installed, this requirement is Not Applicable. +Verify RHEL 9 disables ability of the user to override the graphical user interface autorun setting. Determine which profile the system database is using with the following command: -$ sudo grep system-db /etc/dconf/profile/user - -system-db:local - -Check that the automount setting is locked from nonprivileged user modification with the following command: - -Note: The example below is using the database "local" for the system, so the path is "/etc/dconf/db/local.d". This path must be modified if a database other than "local" is being used. - -$ grep 'autorun-never' /etc/dconf/db/local.d/locks/* - -/org/gnome/desktop/media-handling/autorun-never - -If the command does not return at least the example result, this is a finding.SRG-OS-000480-GPOS-00229<GroupDescription></GroupDescription>RHEL-09-271040RHEL 9 must not allow unattended or automatic logon via the graphical user interface.<VulnDiscussion>Failure to restrict system access to authenticated users negatively impacts operating system security.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000366Configure the GNOME desktop display manager to disable automatic login. +$ gsettings writable org.gnome.desktop.media-handling autorun-never + +false + +If "autorun-never" is writable, the result is "true". If this is not documented with the information system security officer (ISSO) as an operational requirement, this is a finding.SRG-OS-000480-GPOS-00229<GroupDescription></GroupDescription>RHEL-09-271040RHEL 9 must not allow unattended or automatic logon via the graphical user interface.<VulnDiscussion>Failure to restrict system access to authenticated users negatively impacts operating system security.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000366Configure the GNOME desktop display manager to disable automatic login. Set AutomaticLoginEnable to false in the [daemon] section in /etc/gdm/custom.conf. For example: [daemon] -AutomaticLoginEnable=falseVerify RHEL 9 does not allow an unattended or automatic logon to the system via a graphical user interface. +AutomaticLoginEnable=falseNote: This requirement assumes the use of the RHEL 9 default graphical user interface, the GNOME desktop environment. If the system does not have any graphical user interface installed, this requirement is Not Applicable. -Note: This requirement assumes the use of the RHEL 9 default graphical user interface, the GNOME desktop environment. If the system does not have any graphical user interface installed, this requirement is Not Applicable. +Verify RHEL 9 does not allow an unattended or automatic logon to the system via a graphical user interface. Check for the value of the "AutomaticLoginEnable" in the "/etc/gdm/custom.conf" file with the following command: $ grep -i automaticlogin /etc/gdm/custom.conf -[daemon] AutomaticLoginEnable=false -If the value of "AutomaticLoginEnable" is not set to "false", this is a finding.SRG-OS-000028-GPOS-00009<GroupDescription></GroupDescription>RHEL-09-271045RHEL 9 must be able to initiate directly a session lock for all connection types using smart card when the smart card is removed.<VulnDiscussion>A session lock is a temporary action taken when a user stops work and moves away from the immediate physical vicinity of the information system but does not want to log out because of the temporary nature of the absence. +If the value of "AutomaticLoginEnable" is not set to "false", this is a finding.SRG-OS-000028-GPOS-00009<GroupDescription></GroupDescription>RHEL-09-271045RHEL 9 must be able to initiate directly a session lock for all connection types using smart card when the smart card is removed.<VulnDiscussion>A session lock is a temporary action taken when a user stops work and moves away from the immediate physical vicinity of the information system but does not want to log out because of the temporary nature of the absence. The session lock is implemented at the point where session activity can be determined. Rather than be forced to wait for a period of time to expire before the user session can be locked, RHEL 9 needs to provide users with the ability to manually invoke a session lock so users can secure their session if it is necessary to temporarily vacate the immediate physical vicinity. @@ -3365,15 +3428,15 @@ removal-action='lock-screen' Then update the dconf system databases: -$ sudo dconf updateVerify RHEL 9 enables a user's session lock until that user re-establishes access using established identification and authentication procedures with the following command: - -Note: This requirement assumes the use of the RHEL 9 default graphical user interface, the GNOME desktop environment. If the system does not have any graphical user interface installed, this requirement is Not Applicable. - -$ grep -R removal-action /etc/dconf/db/* +$ sudo dconf updateNote: This requirement assumes the use of the RHEL 9 default graphical user interface, the GNOME desktop environment. If the system does not have any graphical user interface installed, this requirement is Not Applicable. -/etc/dconf/db/distro.d/20-authselect:removal-action='lock-screen' +Verify RHEL 9 enables a user's session lock until that user reestablishes access using established identification and authentication procedures with the following command: -If the "removal-action='lock-screen'" setting is missing or commented out from the dconf database files, this is a finding.SRG-OS-000028-GPOS-00009<GroupDescription></GroupDescription>RHEL-09-271050RHEL 9 must prevent a user from overriding the disabling of the graphical user smart card removal action.<VulnDiscussion>A session lock is a temporary action taken when a user stops work and moves away from the immediate physical vicinity of the information system but does not want to log out because of the temporary nature of the absence. +$ gsettings get org.gnome.settings-daemon.peripherals.smartcard removal-action + +'lock-screen' + +If the result is not 'lock-screen', this is a finding.SRG-OS-000028-GPOS-00009<GroupDescription></GroupDescription>RHEL-09-271050RHEL 9 must prevent a user from overriding the disabling of the graphical user smart card removal action.<VulnDiscussion>A session lock is a temporary action taken when a user stops work and moves away from the immediate physical vicinity of the information system but does not want to log out because of the temporary nature of the absence. The session lock is implemented at the point where session activity can be determined. Rather than be forced to wait for a period of time to expire before the user session can be locked, RHEL 9 needs to provide users with the ability to manually invoke a session lock so users can secure their session if it is necessary to temporarily vacate the immediate physical vicinity. @@ -3383,25 +3446,15 @@ Satisfies: SRG-OS-000028-GPOS-00009, SRG-OS-000030-GPOS-00011</VulnDiscussion Then update the dconf system databases: -$ sudo dconf updateVerify RHEL 9 disables ability of the user to override the smart card removal action setting. - -Note: This requirement assumes the use of the RHEL 9 default graphical user interface, the GNOME desktop environment. If the system does not have any graphical user interface installed, this requirement is Not Applicable. - -Determine which profile the system database is using with the following command: - -$ sudo grep system-db /etc/dconf/profile/user - -system-db:local - -Check that the removal action setting is locked from nonprivileged user modification with the following command: +$ sudo dconf updateNote: This requirement assumes the use of the RHEL 9 default graphical user interface, the GNOME desktop environment. If the system does not have any graphical user interface installed, this requirement is Not Applicable. -Note: The example below is using the database "local" for the system, so the path is "/etc/dconf/db/local.d". This path must be modified if a database other than "local" is being used. - -$ grep 'removal-action' /etc/dconf/db/local.d/locks/* - -/org/gnome/settings-daemon/peripherals/smartcard/removal-action +Verify RHEL 9 disables ability of the user to override the smart card removal action setting. -If the command does not return at least the example result, this is a finding.SRG-OS-000028-GPOS-00009<GroupDescription></GroupDescription>RHEL-09-271055RHEL 9 must enable a user session lock until that user re-establishes access using established identification and authentication procedures for graphical user sessions.<VulnDiscussion>A session lock is a temporary action taken when a user stops work and moves away from the immediate physical vicinity of the information system but does not want to log out because of the temporary nature of the absence. +$ gsettings writable org.gnome.settings-daemon.peripherals.smartcard removal-action + +false + +If "removal-action" is writable and the result is "true", this is a finding.SRG-OS-000028-GPOS-00009<GroupDescription></GroupDescription>RHEL-09-271055RHEL 9 must enable a user session lock until that user re-establishes access using established identification and authentication procedures for graphical user sessions.<VulnDiscussion>A session lock is a temporary action taken when a user stops work and moves away from the immediate physical vicinity of the information system but does not want to log out because of the temporary nature of the absence. The session lock is implemented at the point where session activity can be determined. @@ -3428,41 +3481,35 @@ $ gsettings get org.gnome.desktop.screensaver lock-enabled true -If the setting is "false", this is a finding.SRG-OS-000028-GPOS-00009<GroupDescription></GroupDescription>RHEL-09-271060RHEL 9 must prevent a user from overriding the screensaver lock-enabled setting for the graphical user interface.<VulnDiscussion>A session time-out lock is a temporary action taken when a user stops work and moves away from the immediate physical vicinity of the information system but does not log out because of the temporary nature of the absence. Rather than relying on the user to manually lock their operating system session prior to vacating the vicinity, operating systems need to be able to identify when a user's session has idled and take action to initiate the session lock. +If the setting is "false", this is a finding.SRG-OS-000028-GPOS-00009<GroupDescription></GroupDescription>RHEL-09-271060RHEL 9 must prevent a user from overriding the screensaver lock-enabled setting for the graphical user interface.<VulnDiscussion>A session time-out lock is a temporary action taken when a user stops work and moves away from the immediate physical vicinity of the information system but does not log out because of the temporary nature of the absence. Rather than relying on the user to manually lock their operating system session prior to vacating the vicinity, operating systems need to be able to identify when a user's session has idled and take action to initiate the session lock. The session lock is implemented at the point where session activity can be determined and/or controlled. Implementing session settings will have little value if a user is able to manipulate these settings from the defaults prescribed in the other requirements of this implementation guide. -Satisfies: SRG-OS-000028-GPOS-00009, SRG-OS-000030-GPOS-00011</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000056CCI-000057CCI-000058Configure RHEL 9 to prevent a user from overriding settings for graphical user interfaces. +Satisfies: SRG-OS-000028-GPOS-00009, SRG-OS-000030-GPOS-00011</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000056CCI-000057CCI-000058Configure RHEL 9 to prevent a user from overriding settings for graphical user interfaces. -Create a database to contain the system-wide screensaver settings (if it does not already exist) with the following command: +Create a database to contain the systemwide screensaver settings (if it does not already exist) with the following command: -Note: The example below is using the database "local" for the system, so if the system is using another database in "/etc/dconf/profile/user", the file should be created under the appropriate subdirectory. +Note: The example below is using the database "local" for the system. If the system is using another database in "/etc/dconf/profile/user", the file should be created under the appropriate subdirectory. $ sudo touch /etc/dconf/db/local.d/locks/session Add the following setting to prevent nonprivileged users from modifying it: -/org/gnome/desktop/screensaver/lock-enabledVerify RHEL 9 prevents a user from overriding settings for graphical user interfaces. - -Note: This requirement assumes the use of the RHEL 9 default graphical user interface, Gnome Shell. If the system does not have any graphical user interface installed, this requirement is Not Applicable. - -Determine which profile the system database is using with the following command: - -$ sudo grep system-db /etc/dconf/profile/user - -system-db:local - -Check that graphical settings are locked from nonprivileged user modification with the following command: +/org/gnome/desktop/screensaver/lock-enabled -Note: The example below is using the database "local" for the system, so the path is "/etc/dconf/db/local.d". This path must be modified if a database other than "local" is being used. +Run the following command to update the database: -$ sudo grep -i lock-enabled /etc/dconf/db/local.d/locks/* +$ sudo dconf updateNote: This requirement assumes the use of the RHEL 9 default graphical user interface, Gnome Shell. If the system does not have any graphical user interface installed, this requirement is Not Applicable. -/org/gnome/desktop/screensaver/lock-enabled +Verify RHEL 9 prevents a user from overriding settings for graphical user interfaces. -If the command does not return at least the example result, this is a finding.SRG-OS-000029-GPOS-00010<GroupDescription></GroupDescription>RHEL-09-271065RHEL 9 must automatically lock graphical user sessions after 15 minutes of inactivity.<VulnDiscussion>A session time-out lock is a temporary action taken when a user stops work and moves away from the immediate physical vicinity of the information system but does not logout because of the temporary nature of the absence. Rather than relying on the user to manually lock their operating system session prior to vacating the vicinity, the GNOME desktop can be configured to identify when a user's session has idled and take action to initiate a session lock. +$ gsettings writable org.gnome.desktop.screensaver lock-enabled + +false + +If "lock-enabled" is writable and the result is "true", this is a finding.SRG-OS-000029-GPOS-00010<GroupDescription></GroupDescription>RHEL-09-271065RHEL 9 must automatically lock graphical user sessions after 15 minutes of inactivity.<VulnDiscussion>A session time-out lock is a temporary action taken when a user stops work and moves away from the immediate physical vicinity of the information system but does not logout because of the temporary nature of the absence. Rather than relying on the user to manually lock their operating system session prior to vacating the vicinity, the GNOME desktop can be configured to identify when a user's session has idled and take action to initiate a session lock. Satisfies: SRG-OS-000029-GPOS-00010, SRG-OS-000031-GPOS-00012</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000057CCI-000060Configure RHEL 9 to initiate a screensaver after a 15-minute period of inactivity for graphical user interfaces. @@ -3486,37 +3533,31 @@ $ sudo gsettings get org.gnome.desktop.session idle-delay uint32 900 -If "idle-delay" is set to "0" or a value greater than "900", this is a finding.SRG-OS-000029-GPOS-00010<GroupDescription></GroupDescription>RHEL-09-271070RHEL 9 must prevent a user from overriding the session idle-delay setting for the graphical user interface.<VulnDiscussion>A session time-out lock is a temporary action taken when a user stops work and moves away from the immediate physical vicinity of the information system but does not logout because of the temporary nature of the absence. Rather than relying on the user to manually lock their operating system session prior to vacating the vicinity, the GNOME desktop can be configured to identify when a user's session has idled and take action to initiate the session lock. As such, users should not be allowed to change session settings. +If "idle-delay" is set to "0" or a value greater than "900", this is a finding.SRG-OS-000029-GPOS-00010<GroupDescription></GroupDescription>RHEL-09-271070RHEL 9 must prevent a user from overriding the session idle-delay setting for the graphical user interface.<VulnDiscussion>A session time-out lock is a temporary action taken when a user stops work and moves away from the immediate physical vicinity of the information system but does not logout because of the temporary nature of the absence. Rather than relying on the user to manually lock their operating system session prior to vacating the vicinity, the GNOME desktop can be configured to identify when a user's session has idled and take action to initiate the session lock. As such, users should not be allowed to change session settings. -Satisfies: SRG-OS-000029-GPOS-00010, SRG-OS-000031-GPOS-00012</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000057CCI-000060Configure RHEL 9 to prevent a user from overriding settings for graphical user interfaces. +Satisfies: SRG-OS-000029-GPOS-00010, SRG-OS-000031-GPOS-00012</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000057CCI-000060Configure RHEL 9 to prevent a user from overriding settings for graphical user interfaces. -Create a database to contain the system-wide screensaver settings (if it does not already exist) with the following command: +Create a database to contain the systemwide screensaver settings (if it does not already exist) with the following command: -Note: The example below is using the database "local" for the system, so if the system is using another database in "/etc/dconf/profile/user", the file should be created under the appropriate subdirectory. +Note: The example below is using the database "local" for the system. If the system is using another database in "/etc/dconf/profile/user", the file should be created under the appropriate subdirectory. $ sudo touch /etc/dconf/db/local.d/locks/session Add the following setting to prevent nonprivileged users from modifying it: -/org/gnome/desktop/session/idle-delayVerify RHEL 9 prevents a user from overriding settings for graphical user interfaces. - -Note: This requirement assumes the use of the RHEL 9 default graphical user interface, the GNOME desktop environment. If the system does not have any graphical user interface installed, this requirement is Not Applicable. - -Determine which profile the system database is using with the following command: - -$ sudo grep system-db /etc/dconf/profile/user - -system-db:local - -Check that graphical settings are locked from nonprivileged user modification with the following command: +/org/gnome/desktop/session/idle-delay -Note: The example below is using the database "local" for the system, so the path is "/etc/dconf/db/local.d". This path must be modified if a database other than "local" is being used. +Run the following command to update the database: -$ sudo grep -i idle /etc/dconf/db/local.d/locks/* +$ sudo dconf updateNote: This requirement assumes the use of the RHEL 9 default graphical user interface, the GNOME desktop environment. If the system does not have any graphical user interface installed, this requirement is Not Applicable. -/org/gnome/desktop/session/idle-delay +Verify RHEL 9 prevents a user from overriding settings for graphical user interfaces. -If the command does not return at least the example result, this is a finding.SRG-OS-000029-GPOS-00010<GroupDescription></GroupDescription>RHEL-09-271075RHEL 9 must initiate a session lock for graphical user interfaces when the screensaver is activated.<VulnDiscussion>A session lock is a temporary action taken when a user stops work and moves away from the immediate physical vicinity of the information system but does not want to logout because of the temporary nature of the absence.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000057Configure RHEL 9 to initiate a session lock for graphical user interfaces when a screensaver is activated. +$ gsettings writable org.gnome.desktop.session idle-delay + +false + +If "idle-delay" is writable and the result is "true", this is a finding.SRG-OS-000029-GPOS-00010<GroupDescription></GroupDescription>RHEL-09-271075RHEL 9 must initiate a session lock for graphical user interfaces when the screensaver is activated.<VulnDiscussion>A session lock is a temporary action taken when a user stops work and moves away from the immediate physical vicinity of the information system but does not want to logout because of the temporary nature of the absence.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000057Configure RHEL 9 to initiate a session lock for graphical user interfaces when a screensaver is activated. Create a database to contain the system-wide screensaver settings (if it does not already exist) with the following command: @@ -3539,62 +3580,50 @@ $ gsettings get org.gnome.desktop.screensaver lock-delay uint32 5 -If the "uint32" setting is not set to "5" or less, or is missing, this is a finding.SRG-OS-000029-GPOS-00010<GroupDescription></GroupDescription>RHEL-09-271080RHEL 9 must prevent a user from overriding the session lock-delay setting for the graphical user interface.<VulnDiscussion>A session time-out lock is a temporary action taken when a user stops work and moves away from the immediate physical vicinity of the information system but does not logout because of the temporary nature of the absence. Rather than relying on the user to manually lock their operating system session prior to vacating the vicinity, the GNOME desktop can be configured to identify when a user's session has idled and take action to initiate the session lock. As such, users should not be allowed to change session settings.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000057Configure RHEL 9 to prevent a user from overriding settings for graphical user interfaces. +If the "uint32" setting is not set to "5" or less, or is missing, this is a finding.SRG-OS-000029-GPOS-00010<GroupDescription></GroupDescription>RHEL-09-271080RHEL 9 must prevent a user from overriding the session lock-delay setting for the graphical user interface.<VulnDiscussion>A session time-out lock is a temporary action taken when a user stops work and moves away from the immediate physical vicinity of the information system but does not logout because of the temporary nature of the absence. Rather than relying on the user to manually lock their operating system session prior to vacating the vicinity, the GNOME desktop can be configured to identify when a user's session has idled and take action to initiate the session lock. As such, users should not be allowed to change session settings.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000057Configure RHEL 9 to prevent a user from overriding settings for graphical user interfaces. -Create a database to contain the system-wide screensaver settings (if it does not already exist) with the following command: +Create a database to contain the systemwide screensaver settings (if it does not already exist) with the following command: -Note: The example below is using the database "local" for the system, so if the system is using another database in "/etc/dconf/profile/user", the file should be created under the appropriate subdirectory. +Note: The example below is using the database "local" for the system. If the system is using another database in "/etc/dconf/profile/user", the file should be created under the appropriate subdirectory. $ sudo touch /etc/dconf/db/local.d/locks/session Add the following setting to prevent nonprivileged users from modifying it: -/org/gnome/desktop/screensaver/lock-delayVerify RHEL 9 prevents a user from overriding settings for graphical user interfaces. - -Note: This requirement assumes the use of the RHEL 9 default graphical user interface, the GNOME desktop environment. If the system does not have any graphical user interface installed, this requirement is Not Applicable. - -Determine which profile the system database is using with the following command: - -$ sudo grep system-db /etc/dconf/profile/user - -system-db:local - -Check that graphical settings are locked from nonprivileged user modification with the following command: +/org/gnome/desktop/screensaver/lock-delay -Note: The example below is using the database "local" for the system, so the path is "/etc/dconf/db/local.d". This path must be modified if a database other than "local" is being used. +Run the following command to update the database: -$ sudo grep -i lock-delay /etc/dconf/db/local.d/locks/* +$ sudo dconf updateNote: This requirement assumes the use of the RHEL 9 default graphical user interface, the GNOME desktop environment. If the system does not have any graphical user interface installed, this requirement is Not Applicable. -/org/gnome/desktop/screensaver/lock-delay +Verify RHEL 9 prevents a user from overriding settings for graphical user interfaces. -If the command does not return at least the example result, this is a finding.SRG-OS-000031-GPOS-00012<GroupDescription></GroupDescription>RHEL-09-271085RHEL 9 must conceal, via the session lock, information previously visible on the display with a publicly viewable image.<VulnDiscussion>Setting the screensaver mode to blank-only conceals the contents of the display from passersby.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000060The dconf settings can be edited in the /etc/dconf/db/* location. +$ gsettings writable org.gnome.desktop.screensaver lock-delay + +false + +If "lock-delay" is writable and the result is "true", this is a finding.SRG-OS-000031-GPOS-00012<GroupDescription></GroupDescription>RHEL-09-271085RHEL 9 must conceal, via the session lock, information previously visible on the display with a publicly viewable image.<VulnDiscussion>Setting the screensaver mode to blank-only conceals the contents of the display from passersby.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000060Configure RHEL 9 to prevent a user from overriding the picture-uri setting for graphical user interfaces. -First, add or update the [org/gnome/desktop/screensaver] section of the "/etc/dconf/db/local.d/00-security-settings" database file and add or update the following lines: +In the file "/etc/dconf/db/local.d/00-security-settings", add or update the following lines: [org/gnome/desktop/screensaver] picture-uri='' -Then, add the following line to "/etc/dconf/db/local.d/locks/00-security-settings-lock" to prevent user modification: +Prevent user modification by adding the following line to "/etc/dconf/db/local.d/locks/00-security-settings-lock": /org/gnome/desktop/screensaver/picture-uri -Finally, update the dconf system databases: +Update the dconf system databases: -$ sudo dconf updateTo ensure the screensaver is configured to be blank, run the following command: +$ sudo dconf updateNote: This requirement assumes the use of the RHEL 9 default graphical user interface, the GNOME desktop environment. If the system does not have any graphical user interface installed, this requirement is Not Applicable. -Note: This requirement assumes the use of the RHEL 9 default graphical user interface, the GNOME desktop environment. If the system does not have any graphical user interface installed, this requirement is Not Applicable. - -$ gsettings get org.gnome.desktop.screensaver picture-uri - -If properly configured, the output should be "''". - -To ensure that users cannot set the screensaver background, run the following: +To ensure the screensaver is configured to be blank, run the following command: -$ grep picture-uri /etc/dconf/db/local.d/locks/* - -If properly configured, the output should be "/org/gnome/desktop/screensaver/picture-uri". - -If it is not set or configured properly, this is a finding.SRG-OS-000480-GPOS-00227<GroupDescription></GroupDescription>RHEL-09-271090RHEL 9 effective dconf policy must match the policy keyfiles.<VulnDiscussion>Unlike text-based keyfiles, the binary database is impossible to check through most automated and all manual means; therefore, in order to evaluate dconf configuration, both have to be true at the same time - configuration files have to be compliant, and the database needs to be more recent than those keyfiles, which gives confidence that it reflects them.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000366Update the dconf databases by running the following command: +$ gsettings writable org.gnome.desktop.screensaver picture-uri + +false + +If "picture-uri" is writable and the result is "true", this is a finding.SRG-OS-000480-GPOS-00227<GroupDescription></GroupDescription>RHEL-09-271090RHEL 9 effective dconf policy must match the policy keyfiles.<VulnDiscussion>Unlike text-based keyfiles, the binary database is impossible to check through most automated and all manual means; therefore, in order to evaluate dconf configuration, both have to be true at the same time - configuration files have to be compliant, and the database needs to be more recent than those keyfiles, which gives confidence that it reflects them.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000366Update the dconf databases by running the following command: $ sudo dconf updateCheck the last modification time of the local databases, comparing it to the last modification time of the related keyfiles. The following command will check every dconf database and compare its modification time to the related system keyfiles: @@ -3602,26 +3631,23 @@ Note: This requirement assumes the use of the RHEL 9 default graphical user inte $ function dconf_needs_update { for db in $(find /etc/dconf/db -maxdepth 1 -type f); do db_mtime=$(stat -c %Y "$db"); keyfile_mtime=$(stat -c %Y "$db".d/* | sort -n | tail -1); if [ -n "$db_mtime" ] && [ -n "$keyfile_mtime" ] && [ "$db_mtime" -lt "$keyfile_mtime" ]; then echo "$db needs update"; return 1; fi; done; }; dconf_needs_update -If the command has any output, then a dconf database needs to be updated, and this is a finding.SRG-OS-000480-GPOS-00227<GroupDescription></GroupDescription>RHEL-09-271095RHEL 9 must disable the ability of a user to restart the system from the login screen.<VulnDiscussion>A user who is at the console can reboot the system at the login screen. If restart or shutdown buttons are pressed at the login screen, this can create the risk of short-term loss of availability of systems due to reboot.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000366Configure RHEL 9 to disable a user's ability to restart the system. - -Add or update the [org/gnome/settings-daemon/] section of the /etc/dconf/db/local.d/00-security-settings database file and add or update the following lines: - -[org/gnome/login-screen] -disable-restart-buttons=true - -Then update the dconf system databases: +If the command has any output, then a dconf database needs to be updated, and this is a finding.SRG-OS-000480-GPOS-00227<GroupDescription></GroupDescription>RHEL-09-271095RHEL 9 must disable the ability of a user to restart the system from the login screen.<VulnDiscussion>A user who is at the console can reboot the system at the login screen. If restart or shutdown buttons are pressed at the login screen, this can create the risk of short-term loss of availability of systems due to reboot.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000366Configure RHEL 9 to disable a user's ability to restart the system. -$ sudo dconf updateVerify RHEL 9 disables a user's ability to restart the system with the following command: +$ gsettings set org.gnome.login-screen disable-restart-buttons true -Note: This requirement assumes the use of the RHEL 9 default graphical user interface, Gnome Shell. If the system does not have any graphical user interface installed, this requirement is Not Applicable. +Update the dconf system databases: -$ grep -R disable-restart-buttons /etc/dconf/db/* +$ sudo dconf updateNote: This requirement assumes the use of the RHEL 9 default graphical user interface, Gnome Shell. If the system does not have any graphical user interface installed, this requirement is Not Applicable. -/etc/dconf/db/distro.d/20-authselect:disable-restart-buttons='true' +Verify RHEL 9 disables a user's ability to restart the system with the following command: -If the "disable-restart-button" setting is not set to "true", is missing or commented out from the dconf database files, this is a finding.SRG-OS-000480-GPOS-00227<GroupDescription></GroupDescription>RHEL-09-271100RHEL 9 must prevent a user from overriding the disable-restart-buttons setting for the graphical user interface.<VulnDiscussion>A user who is at the console can reboot the system at the login screen. If restart or shutdown buttons are pressed at the login screen, this can create the risk of short-term loss of availability of systems due to reboot.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000366Configure RHEL 9 to prevent a user from overriding the disable-restart-buttons setting for graphical user interfaces. +$ gsettings get org.gnome.login-screen disable-restart-buttons + +true + +If "disable-restart-buttons" is "false", this is a finding.SRG-OS-000480-GPOS-00227<GroupDescription></GroupDescription>RHEL-09-271100RHEL 9 must prevent a user from overriding the disable-restart-buttons setting for the graphical user interface.<VulnDiscussion>A user who is at the console can reboot the system at the login screen. If restart or shutdown buttons are pressed at the login screen, this can create the risk of short-term loss of availability of systems due to reboot.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000366Configure RHEL 9 to prevent a user from overriding the disable-restart-buttons setting for graphical user interfaces. -Create a database to contain the system-wide graphical user logon settings (if it does not already exist) with the following command: +Create a database to contain the systemwide graphical user logon settings (if it does not already exist) with the following command: $ sudo touch /etc/dconf/db/local.d/locks/session @@ -3631,34 +3657,23 @@ Add the following line to prevent nonprivileged users from modifying it: Run the following command to update the database: -$ sudo dconf updateVerify RHEL 9 prevents a user from overriding the disable-restart-buttons setting for graphical user interfaces. - -Note: This requirement assumes the use of the RHEL 9 default graphical user interface, the GNOME desktop environment. If the system does not have any graphical user interface installed, this requirement is Not Applicable. - -Determine which profile the system database is using with the following command: - -$ sudo grep system-db /etc/dconf/profile/user - -system-db:local - -Check that graphical settings are locked from nonprivileged user modification with the following command: - -Note: The example below is using the database "local" for the system, so the path is "/etc/dconf/db/local.d". This path must be modified if a database other than "local" is being used. - -$ grep disable-restart-buttons /etc/dconf/db/local.d/locks/* +$ sudo dconf updateNote: This requirement assumes the use of the RHEL 9 default graphical user interface, the GNOME desktop environment. If the system does not have any graphical user interface installed, this requirement is Not Applicable. -/org/gnome/login-screen/disable-restart-buttons +Verify RHEL 9 prevents a user from overriding the disable-restart-buttons setting for graphical user interfaces. -If the command does not return at least the example result, this is a finding.SRG-OS-000480-GPOS-00227<GroupDescription></GroupDescription>RHEL-09-271105RHEL 9 must disable the ability of a user to accidentally press Ctrl-Alt-Del and cause a system to shut down or reboot.<VulnDiscussion>A locally logged-in user who presses Ctrl-Alt-Del, when at the console, can reboot the system. If accidentally pressed, as could happen in the case of mixed OS environment, this can create the risk of short-term loss of availability of systems due to unintentional reboot.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000366Configure RHEL 9 to ignore the Ctrl-Alt-Del sequence in the GNOME desktop. +$ gsettings writable org.gnome.login-screen disable-restart-buttons + +false + +If "disable-restart-buttons" is writable and the result is "true", this is a finding.SRG-OS-000480-GPOS-00227<GroupDescription></GroupDescription>RHEL-09-271105RHEL 9 must disable the ability of a user to accidentally press Ctrl-Alt-Del and cause a system to shut down or reboot.<VulnDiscussion>A locally logged-in user who presses Ctrl-Alt-Del, when at the console, can reboot the system. If accidentally pressed, as could happen in the case of mixed OS environment, this can create the risk of short-term loss of availability of systems due to unintentional reboot.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000366Configure RHEL 9 to ignore the Ctrl-Alt-Del sequence in the GNOME desktop. -Add or update the [org/gnome/settings-daemon/plugins/media-keys] section of the /etc/dconf/db/local.d/00-security-settings database file and add or update the following lines: +Run the following command to set the media-keys logout setting: -[org/gnome/settings-daemon/plugins/media-keys] -logout=[''] +$ gsettings set org.gnome.settings-daemon.plugins.media-keys logout "['']" Run the following command to update the database: -$ sudo dconf updateVerify RHEL 9 is configured to ignore the Ctrl-Alt-Del sequence in the GNOME desktop with the following command: +$ sudo dconf updateVerify RHEL 9 is configured to ignore the Ctrl-Alt-Del sequence in the GNOME desktop with the following command: Note: This requirement assumes the use of the RHEL 9 default graphical user interface, the GNOME desktop environment. If the system does not have any graphical user interface installed, this requirement is Not Applicable. @@ -3666,9 +3681,9 @@ $ gsettings get org.gnome.settings-daemon.plugins.media-keys logout "['']" -If the GNOME desktop is configured to shut down when Ctrl-Alt-Del is pressed, this is a finding.SRG-OS-000480-GPOS-00227<GroupDescription></GroupDescription>RHEL-09-271110RHEL 9 must prevent a user from overriding the Ctrl-Alt-Del sequence settings for the graphical user interface.<VulnDiscussion>A locally logged-in user who presses Ctrl-Alt-Del, when at the console, can reboot the system. If accidentally pressed, as could happen in the case of mixed OS environment, this can create the risk of short-term loss of availability of systems due to unintentional reboot.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000366Configure RHEL 9 to disallow the user changing the Ctrl-Alt-Del sequence in the GNOME desktop. +If the GNOME desktop is configured to shut down when Ctrl-Alt-Del is pressed, this is a finding.SRG-OS-000480-GPOS-00227<GroupDescription></GroupDescription>RHEL-09-271110RHEL 9 must prevent a user from overriding the Ctrl-Alt-Del sequence settings for the graphical user interface.<VulnDiscussion>A locally logged-in user who presses Ctrl-Alt-Del, when at the console, can reboot the system. If accidentally pressed, as could happen in the case of mixed OS environment, this can create the risk of short-term loss of availability of systems due to unintentional reboot.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000366Configure RHEL 9 to disallow the user changing the Ctrl-Alt-Del sequence in the GNOME desktop. -Create a database to container system-wide graphical user logon settings (if it does not already exist) with the following command: +Create a database to contain the systemwide graphical user logon settings (if it does not already exist) with the following command: $ sudo touch /etc/dconf/db/local.d/locks/session @@ -3678,49 +3693,60 @@ Add the following line to the session locks file to prevent nonprivileged users Run the following command to update the database: -$ sudo dconf updateVerify that users cannot enable the Ctrl-Alt-Del sequence in the GNOME desktop with the following command: +$ sudo dconf updateNote: This requirement assumes the use of the RHEL 9 default graphical user interface, the GNOME desktop environment. If the system does not have any graphical user interface installed, this requirement is Not Applicable. -Note: This requirement assumes the use of the RHEL 9 default graphical user interface, the GNOME desktop environment. If the system does not have any graphical user interface installed, this requirement is Not Applicable. +Verify that users cannot enable the Ctrl-Alt-Del sequence in the GNOME desktop with the following command: -$ grep logout /etc/dconf/db/local.d/locks/* +$ gsettings writable org.gnome.settings-daemon.plugins.media-keys logout + +false + +If "logout" is writable and the result is "true", this is a finding.SRG-OS-000480-GPOS-00227<GroupDescription></GroupDescription>RHEL-09-271115RHEL 9 must disable the user list at logon for graphical user interfaces.<VulnDiscussion>Leaving the user list enabled is a security risk since it allows anyone with physical access to the system to enumerate known user accounts without authenticated access to the system.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000366Configure RHEL 9 to disable the user list at logon for graphical user interfaces. -/org/gnome/settings-daemon/plugins/media-keys/logout +Create a database to contain the systemwide screensaver settings (if it does not already exist) with the following command: +Note: The example below is using the database "local" for the system. If the system is using another database in "/etc/dconf/profile/user", the file should be created under the appropriate subdirectory. -If the output is not "/org/gnome/settings-daemon/plugins/media-keys/logout", the line is commented out, or the line is missing, this is a finding.SRG-OS-000480-GPOS-00227<GroupDescription></GroupDescription>RHEL-09-271115RHEL 9 must disable the user list at logon for graphical user interfaces.<VulnDiscussion>Leaving the user list enabled is a security risk since it allows anyone with physical access to the system to enumerate known user accounts without authenticated access to the system.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000366Configure RHEL 9 to disable the user list at logon for graphical user interfaces. - -Create a database to contain the system-wide screensaver settings (if it does not already exist) with the following command: -Note: The example below is using the database "local" for the system, so if the system is using another database in "/etc/dconf/profile/user", the file should be created under the appropriate subdirectory. - -$ sudo touch /etc/dconf/db/local.d/02-login-screen +$ sudo touch /etc/dconf/db/local.d/02-login-screen [org/gnome/login-screen] disable-user-list=true Update the system databases: -$ sudo dconf updateVerify that RHEL 9 disables the user logon list for graphical user interfaces with the following command: +$ sudo dconf updateNote: This requirement assumes the use of the RHEL 9 default graphical user interface, the GNOME desktop environment. If the system does not have any graphical user interface installed, this requirement is Not Applicable. -Note: This requirement assumes the use of the RHEL 9 default graphical user interface, the GNOME desktop environment. If the system does not have any graphical user interface installed, this requirement is Not Applicable. +Verify that RHEL 9 disables the user logon list for graphical user interfaces with the following command: + +$ gsettings get org.gnome.login-screen disable-user-list -$ sudo gsettings get org.gnome.login-screen disable-user-list true -If the setting is "false", this is a finding.SRG-OS-000114-GPOS-00059<GroupDescription></GroupDescription>RHEL-09-291010RHEL 9 must be configured to disable USB mass storage.<VulnDiscussion>USB mass storage permits easy introduction of unknown devices, thereby facilitating malicious activity. +If the setting is "false", this is a finding.SRG-OS-000114-GPOS-00059<GroupDescription></GroupDescription>RHEL-09-291010RHEL 9 must be configured to disable USB mass storage.<VulnDiscussion>USB mass storage permits easy introduction of unknown devices, thereby facilitating malicious activity. -Satisfies: SRG-OS-000114-GPOS-00059, SRG-OS-000378-GPOS-00163, SRG-OS-000480-GPOS-00227</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000778CCI-001958CCI-003959To configure the system to prevent the usb-storage kernel module from being loaded, add the following line to the file /etc/modprobe.d/usb-storage.conf (or create usb-storage.conf if it does not exist): +Satisfies: SRG-OS-000114-GPOS-00059, SRG-OS-000378-GPOS-00163, SRG-OS-000480-GPOS-00227</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000778CCI-001958CCI-003959To configure the system to prevent the usb-storage kernel module from being loaded, add the following lines to the file "/etc/modprobe.d/usb-storage.conf" (or create "usb-storage.conf" if it does not exist): install usb-storage /bin/false -blacklist usb-storageVerify that RHEL 9 disables the ability to load the USB Storage kernel module with the following command: +blacklist usb-storageVerify that RHEL 9 disables the ability to load the USB Storage kernel module with the following command: -$ sudo grep -r usb-storage /etc/modprobe.conf /etc/modprobe.d/* +$ grep -r usb-storage /etc/modprobe.conf /etc/modprobe.d/* +install usb-storage /bin/false blacklist usb-storage -If the command does not return any output, or the line is commented out, and use of USB Storage is not documented with the information system security officer (ISSO) as an operational requirement, this is a finding.SRG-OS-000378-GPOS-00163<GroupDescription></GroupDescription>RHEL-09-291015RHEL 9 must have the USBGuard package installed.<VulnDiscussion>The USBguard-daemon is the main component of the USBGuard software framework. It runs as a service in the background and enforces the USB device authorization policy for all USB devices. The policy is defined by a set of rules using a rule language described in the usbguard-rules.conf file. The policy and the authorization state of USB devices can be modified during runtime using the usbguard tool. +If the command does not return any output, or either line is commented out, and use of USB Storage is not documented with the information system security officer (ISSO) as an operational requirement, this is a finding.SRG-OS-000378-GPOS-00163<GroupDescription></GroupDescription>RHEL-09-291015RHEL 9 must have the USBGuard package installed.<VulnDiscussion>The USBguard-daemon is the main component of the USBGuard software framework. It runs as a service in the background and enforces the USB device authorization policy for all USB devices. The policy is defined by a set of rules using a rule language described in the usbguard-rules.conf file. The policy and the authorization state of USB devices can be modified during runtime using the usbguard tool. + +The system administrator (SA) must work with the site information system security officer (ISSO) to determine a list of authorized peripherals and establish rules within the USBGuard software framework to allow only authorized devices.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-001958CCI-003959Install the usbguard package with the following command: + +$ sudo dnf install usbguard + +Enable the service to start on boot and then start it with the following commands: +$ sudo systemctl enable usbguard +$ sudo systemctl start usbguard -The system administrator (SA) must work with the site information system security officer (ISSO) to determine a list of authorized peripherals and establish rules within the USBGuard software framework to allow only authorized devices.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-001958CCI-003959Install the usbguard package with the following command: +Verify the status of the service with the following command: +$ sudo systemctl status usbguard -$ sudo dnf install usbguardVerify USBGuard is installed on the operating system with the following command: +Note: usbguard will need to be configured to allow authorized devices once it is enabled on RHEL 9.Verify USBGuard is installed on the operating system with the following command: $ sudo dnf list installed usbguard @@ -3775,40 +3801,41 @@ AuditBackend=LinuxAudit If "AuditBackend" is not set to "LinuxAudit", this is a finding. -If the system is virtual machine with no virtual or physical USB peripherals attached, this is not a finding.SRG-OS-000378-GPOS-00163<GroupDescription></GroupDescription>RHEL-09-291030RHEL 9 must block unauthorized peripherals before establishing a connection.<VulnDiscussion>The USBguard-daemon is the main component of the USBGuard software framework. It runs as a service in the background and enforces the USB device authorization policy for all USB devices. The policy is defined by a set of rules using a rule language described in the usbguard-rules.conf file. The policy and the authorization state of USB devices can be modified during runtime using the usbguard tool. - -The system administrator (SA) must work with the site information system security officer (ISSO) to determine a list of authorized peripherals and establish rules within the USBGuard software framework to allow only authorized devices.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-001958Configure the operating system to enable the blocking of unauthorized peripherals with the following command: +If the system is virtual machine with no virtual or physical USB peripherals attached, this is not a finding.SRG-OS-000378-GPOS-00163<GroupDescription></GroupDescription>RHEL-09-291030RHEL 9 must block unauthorized peripherals before establishing a connection.<VulnDiscussion>The USBguard-daemon is the main component of the USBGuard software framework. It runs as a service in the background and enforces the USB device authorization policy for all USB devices. The policy is defined by a set of rules using a rule language described in the usbguard-rules.conf file. The policy and the authorization state of USB devices can be modified during runtime using the usbguard tool. + +The system administrator (SA) must work with the site information system security officer (ISSO) to determine a list of authorized peripherals and establish rules within the USBGuard software framework to allow only authorized devices.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-001958Configure the operating system to enable the blocking of unauthorized peripherals with the following command: -Note: This command must be run from a root shell and will create an allow list for any usb devices currently connect to the system. +Note: This command must be run from a root shell and will create an allow list for any usb devices currently connected to the system. # usbguard generate-policy --no-hash > /etc/usbguard/rules.conf -Note: Enabling and starting usbguard without properly configuring it for an individual system will immediately prevent any access over a usb device such as a keyboard or mouse.Note: If the system is virtual machine with no virtual or physical USB peripherals attached, this is Not Applicable. - -Verify the USBGuard has a policy configured with the following command: - -$ usbguard list-rules - -allow id 1d6b:0001 serial - -If the command does not return results or an error is returned, ask the SA to indicate how unauthorized peripherals are being blocked. - -If there is no evidence that unauthorized peripherals are being blocked before establishing a connection, this is a finding.SRG-OS-000095-GPOS-00049<GroupDescription></GroupDescription>RHEL-09-291035RHEL 9 Bluetooth must be disabled.<VulnDiscussion>This requirement applies to wireless peripheral technologies (e.g., wireless mice, keyboards, displays, etc.) used with RHEL 9 systems. Wireless peripherals (e.g., Wi-Fi/Bluetooth/IR keyboards, mice and pointing devices, and near field communications [NFC]) present a unique challenge by creating an open, unsecured port on a computer. Wireless peripherals must meet DOD requirements for wireless data transmission and be approved for use by the Authorizing Official (AO). Even though some wireless peripherals, such as mice and pointing devices, do not ordinarily carry information that need to be protected, modification of communications with these wireless peripherals may be used to compromise the RHEL 9 operating system. +Note: Enabling and starting usbguard without properly configuring it for an individual system will immediately prevent any access over a usb device such as a keyboard or mouse.Note: If the system is virtual machine with no virtual or physical USB peripherals attached, this is Not Applicable. + +Verify the USBGuard has a policy configured with the following command: + +$ sudo usbguard list-rules + +allow id 1d6b:0001 serial -Satisfies: SRG-OS-000095-GPOS-00049, SRG-OS-000300-GPOS-00118</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000381CCI-001443Configure RHEL 9 to disable the Bluetooth adapter when not in use. +If the command does not return results or an error is returned, ask the SA to indicate how unauthorized peripherals are being blocked. -Create or modify the "/etc/modprobe.d/bluetooth.conf" file with the following line: +If there is no evidence that unauthorized peripherals are being blocked before establishing a connection, this is a finding.SRG-OS-000095-GPOS-00049<GroupDescription></GroupDescription>RHEL-09-291035RHEL 9 Bluetooth must be disabled.<VulnDiscussion>This requirement applies to wireless peripheral technologies (e.g., wireless mice, keyboards, displays, etc.) used with RHEL 9 systems. Wireless peripherals (e.g., Wi-Fi/Bluetooth/IR keyboards, mice and pointing devices, and near field communications [NFC]) present a unique challenge by creating an open, unsecured port on a computer. Wireless peripherals must meet DOD requirements for wireless data transmission and be approved for use by the Authorizing Official (AO). Even though some wireless peripherals, such as mice and pointing devices, do not ordinarily carry information that need to be protected, modification of communications with these wireless peripherals may be used to compromise the RHEL 9 operating system. + +Satisfies: SRG-OS-000095-GPOS-00049, SRG-OS-000300-GPOS-00118</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000381CCI-001443Configure RHEL 9 to disable the Bluetooth adapter when not in use. + +Create or modify the "/etc/modprobe.d/bluetooth.conf" file with the following lines: install bluetooth /bin/false blacklist bluetooth -Reboot the system for the settings to take effect.Verify that RHEL 9 disables the ability to load the Bluetooth kernel module with the following command: +Reboot the system for the settings to take effect.Verify that RHEL 9 disables the ability to load the Bluetooth kernel module with the following command: $ sudo grep -r bluetooth /etc/modprobe.conf /etc/modprobe.d/* +install bluetooth /bin/false blacklist bluetooth - -If the command does not return any output, or the line is commented out, and use of Bluetooth is not documented with the information system security officer (ISSO) as an operational requirement, this is a finding.SRG-OS-000299-GPOS-00117<GroupDescription></GroupDescription>RHEL-09-291040RHEL 9 wireless network adapters must be disabled.<VulnDiscussion>This requirement applies to wireless peripheral technologies (e.g., wireless mice, keyboards, displays, etc.) used with RHEL 9 systems. Wireless peripherals (e.g., Wi-Fi/Bluetooth/IR keyboards, mice and pointing devices, and near field communications [NFC]) present a unique challenge by creating an open, unsecured port on a computer. Wireless peripherals must meet DOD requirements for wireless data transmission and be approved for use by the Authorizing Official (AO). Even though some wireless peripherals, such as mice and pointing devices, do not ordinarily carry information that need to be protected, modification of communications with these wireless peripherals may be used to compromise the RHEL 9 operating system. + +If the command does not return any output, or the lines are commented out, and use of Bluetooth is not documented with the information system security officer (ISSO) as an operational requirement, this is a finding.SRG-OS-000299-GPOS-00117<GroupDescription></GroupDescription>RHEL-09-291040RHEL 9 wireless network adapters must be disabled.<VulnDiscussion>This requirement applies to wireless peripheral technologies (e.g., wireless mice, keyboards, displays, etc.) used with RHEL 9 systems. Wireless peripherals (e.g., Wi-Fi/Bluetooth/IR keyboards, mice and pointing devices, and near field communications [NFC]) present a unique challenge by creating an open, unsecured port on a computer. Wireless peripherals must meet DOD requirements for wireless data transmission and be approved for use by the Authorizing Official (AO). Even though some wireless peripherals, such as mice and pointing devices, do not ordinarily carry information that need to be protected, modification of communications with these wireless peripherals may be used to compromise the RHEL 9 operating system. Satisfies: SRG-OS-000299-GPOS-00117, SRG-OS-000300-GPOS-00118, SRG-OS-000424-GPOS-00188, SRG-OS-000481-GPOS-00481</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-001443CCI-001444CCI-002418CCI-002421Configure the system to disable all wireless network interfaces with the following command: @@ -3826,7 +3853,7 @@ p2p-dev-wlp7s0 wifi-p2p disconnected -- lo loopback unmanaged -- virbr0-nic tun unmanaged -- -If a wireless interface is configured and has not been documented and approved by the information system security officer (ISSO), this is a finding.SRG-OS-000076-GPOS-00044<GroupDescription></GroupDescription>RHEL-09-411010RHEL 9 user account passwords for new users or password changes must have a 60-day maximum password lifetime restriction in /etc/login.defs.<VulnDiscussion>Any password, no matter how complex, can eventually be cracked; therefore, passwords need to be changed periodically. If the operating system does not limit the lifetime of passwords and force users to change their passwords, there is the risk that the operating system passwords could be compromised. +If a wireless interface is configured and has not been documented and approved by the information system security officer (ISSO), this is a finding.SRG-OS-000076-GPOS-00044<GroupDescription></GroupDescription>RHEL-09-411010RHEL 9 user account passwords for new users or password changes must have a 60-day maximum password lifetime restriction in /etc/login.defs.<VulnDiscussion>Any password, no matter how complex, can eventually be cracked; therefore, passwords need to be changed periodically. If the operating system does not limit the lifetime of passwords and force users to change their passwords, there is the risk that the operating system passwords could be compromised. Setting the password maximum age ensures users are required to periodically change their passwords. Requiring shorter password lifetimes increases the risk of users writing down the password in a convenient location subject to physical compromise.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-004066CCI-000199Configure RHEL 9 to enforce a 60-day maximum password lifetime. @@ -3838,13 +3865,13 @@ $ grep -i pass_max_days /etc/login.defs PASS_MAX_DAYS 60 -If the "PASS_MAX_DAYS" parameter value is greater than "60", or commented out, this is a finding.SRG-OS-000076-GPOS-00044<GroupDescription></GroupDescription>RHEL-09-411015RHEL 9 user account passwords must have a 60-day maximum password lifetime restriction.<VulnDiscussion>Any password, no matter how complex, can eventually be cracked; therefore, passwords need to be changed periodically. If RHEL 9 does not limit the lifetime of passwords and force users to change their passwords, there is the risk that RHEL 9 passwords could be compromised.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-004066CCI-000199Configure noncompliant accounts to enforce a 60-day maximum password lifetime restriction. +If the "PASS_MAX_DAYS" parameter value is greater than "60", or commented out, this is a finding.SRG-OS-000076-GPOS-00044<GroupDescription></GroupDescription>RHEL-09-411015RHEL 9 user account passwords must have a 60-day maximum password lifetime restriction.<VulnDiscussion>Any password, no matter how complex, can eventually be cracked; therefore, passwords need to be changed periodically. If RHEL 9 does not limit the lifetime of passwords and force users to change their passwords, there is the risk that RHEL 9 passwords could be compromised.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-004066CCI-000199Configure noncompliant accounts to enforce a 60-day maximum password lifetime restriction. -passwd -x 60 [user]Check whether the maximum time period for existing passwords is restricted to 60 days with the following commands: +passwd -x 60 [user]Verify the maximum time period for existing passwords is restricted to 60 days with the following commands: -$ sudo awk -F: '$5 > 60 {print $1 "" "" $5}' /etc/shadow +$ sudo awk -F: '$5 > 60 {printf "%s %d\n", $1, $5}' /etc/shadow -$ sudo awk -F: '$5 <= 0 {print $1 "" "" $5}' /etc/shadow +$ sudo awk -F: '$5 <= 0 {printf "%s %d\n", $1, $5}' /etc/shadow If any results are returned that are not associated with a system account, this is a finding.SRG-OS-000480-GPOS-00227<GroupDescription></GroupDescription>RHEL-09-411020All RHEL 9 local interactive user accounts must be assigned a home directory upon creation.<VulnDiscussion>If local interactive users are not assigned a valid home directory, there is no place for the storage and control of files they should own.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000366Configure RHEL 9 to assign home directories to all new local interactive users by setting the "CREATE_HOME" parameter in "/etc/login.defs" to "yes" as follows. @@ -3854,9 +3881,9 @@ $ grep -i create_home /etc/login.defs CREATE_HOME yes -If the value for "CREATE_HOME" parameter is not set to "yes", the line is missing, or the line is commented out, this is a finding.SRG-OS-000480-GPOS-00227<GroupDescription></GroupDescription>RHEL-09-411025RHEL 9 must set the umask value to 077 for all local interactive user accounts.<VulnDiscussion>The umask controls the default access mode assigned to newly created files. A umask of 077 limits new files to mode 600 or less permissive. Although umask can be represented as a four-digit number, the first digit representing special access modes is typically ignored or required to be "0". This requirement applies to the globally configured system defaults and the local interactive user defaults for each account on the system.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000366Remove the umask statement from all local interactive user's initialization files. +If the value for "CREATE_HOME" parameter is not set to "yes", the line is missing, or the line is commented out, this is a finding.SRG-OS-000480-GPOS-00227<GroupDescription></GroupDescription>RHEL-09-411025RHEL 9 must set the umask value to 077 for all local interactive user accounts.<VulnDiscussion>The umask controls the default access mode assigned to newly created files. A umask of 077 limits new files to mode 600 or less permissive. Although umask can be represented as a four-digit number, the first digit representing special access modes is typically ignored or required to be "0". This requirement applies to the globally configured system defaults and the local interactive user defaults for each account on the system.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000366Remove the umask statement from all local interactive user's initialization files. -If the account is for an application, the requirement for a umask less restrictive than "077" can be documented with the information system security officer, but the user agreement for access to the account must specify that the local interactive user must log on to their account first and then switch the user to the application account with the correct option to gain the account's environment variables.Verify that the default umask for all local interactive users is "077". +If the account is for an application, the requirement for a umask less restrictive than "077" can be documented with the information system security officer, but the user agreement for access to the account must specify that the local interactive user must log on to their account first and then switch the user to the application account with the correct option to gain the account's environment variables.Verify that the default umask for all local interactive users is "077". Identify the locations of all local interactive user home directories by looking at the "/etc/passwd" file. @@ -3864,7 +3891,7 @@ Check all local interactive user initialization files for interactive users with Note: The example is for a system that is configured to create users home directories in the "/home" directory. -# grep -ri umask /home/ +$ sudo find /home -maxdepth 2 -type f -name ".[^.]*" -exec grep -iH -d skip --exclude=.bash_history umask {} \; /home/wadea/.bash_history:grep -i umask /etc/bashrc /etc/csh.cshrc /etc/profile /home/wadea/.bash_history:grep -i umask /etc/login.defs @@ -3939,17 +3966,17 @@ $ sudo grep -i inactive /etc/default/useradd INACTIVE=35 -If "INACTIVE" is set to "-1", a value greater than "35", or is commented out, this is a finding.SRG-OS-000480-GPOS-00227<GroupDescription></GroupDescription>RHEL-09-411055Executable search paths within the initialization files of all local interactive RHEL 9 users must only contain paths that resolve to the system default or the users home directory.<VulnDiscussion>The executable search path (typically the PATH environment variable) contains a list of directories for the shell to search to find executables. If this path includes the current working directory (other than the users home directory), executables in these directories may be executed instead of system commands. +If "INACTIVE" is set to "-1", a value greater than "35", or is commented out, this is a finding.SRG-OS-000480-GPOS-00227<GroupDescription></GroupDescription>RHEL-09-411055Executable search paths within the initialization files of all local interactive RHEL 9 users must only contain paths that resolve to the system default or the users home directory.<VulnDiscussion>The executable search path (typically the PATH environment variable) contains a list of directories for the shell to search to find executables. If this path includes the current working directory (other than the users home directory), executables in these directories may be executed instead of system commands. This variable is formatted as a colon-separated list of directories. If there is an empty entry, such as a leading or trailing colon or two consecutive colons, this is interpreted as the current working directory. If deviations from the default system search path for the local interactive user are required, they must be documented with the information system security officer (ISSO).</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000366Edit the local interactive user initialization files to change any PATH variable statements that reference directories other than their home directory. -If a local interactive user requires path variables to reference a directory owned by the application, it must be documented with the ISSO.Verify that all local interactive user initialization file executable search path statements do not contain statements that will reference a working directory other than user home directories with the following commands: +If a local interactive user requires path variables to reference a directory owned by the application, it must be documented with the ISSO.Verify that all local interactive user initialization file executable search path statements do not contain statements that will reference a working directory other than user home directories with the following commands: -$ sudo grep -i path= /home/*/.* +$ sudo find /home -maxdepth 2 -type f -name ".[^.]*" -exec grep -iH path= {} \; -/home/[localinteractiveuser]/.bash_profile:PATH=$PATH:$HOME/.local/bin:$HOME/bin +PATH="$HOME/.local/bin:$HOME/bin:$PATH" -If any local interactive user initialization files have executable search path statements that include directories outside of their home directory and is not documented with the ISSO as an operational requirement, this is a finding.SRG-OS-000480-GPOS-00227<GroupDescription></GroupDescription>RHEL-09-411060All RHEL 9 local interactive users must have a home directory assigned in the /etc/passwd file.<VulnDiscussion>If local interactive users are not assigned a valid home directory, there is no place for the storage and control of files they should own.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000366Create and assign home directories to all local interactive users on RHEL 9 that currently do not have a home directory assigned.Verify that interactive users on the system have a home directory assigned with the following command: +If any local interactive user initialization files have executable search path statements that include directories outside of their home directory, and this is not documented with the ISSO as an operational requirement, this is a finding.SRG-OS-000480-GPOS-00227<GroupDescription></GroupDescription>RHEL-09-411060All RHEL 9 local interactive users must have a home directory assigned in the /etc/passwd file.<VulnDiscussion>If local interactive users are not assigned a valid home directory, there is no place for the storage and control of files they should own.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000366Create and assign home directories to all local interactive users on RHEL 9 that currently do not have a home directory assigned.Verify that interactive users on the system have a home directory assigned with the following command: $ sudo awk -F: '($3>=1000)&&($7 !~ /nologin/){print $1, $3, $6}' /etc/passwd @@ -4004,54 +4031,53 @@ $ grep 'deny =' /etc/security/faillock.conf deny = 3 -If the "deny" option is not set to "3" or less (but not "0"), is missing or commented out, this is a finding.SRG-OS-000329-GPOS-00128<GroupDescription></GroupDescription>RHEL-09-411080RHEL 9 must automatically lock the root account until the root account is released by an administrator when three unsuccessful logon attempts occur during a 15-minute time period.<VulnDiscussion>By limiting the number of failed logon attempts, the risk of unauthorized system access via user password guessing, also known as brute-forcing, is reduced. Limits are imposed by locking the account. +If the "deny" option is not set to "3" or less (but not "0"), is missing or commented out, this is a finding.SRG-OS-000329-GPOS-00128<GroupDescription></GroupDescription>RHEL-09-411080RHEL 9 must automatically lock the root account until the root account is released by an administrator when three unsuccessful logon attempts occur during a 15-minute time period.<VulnDiscussion>By limiting the number of failed logon attempts, the risk of unauthorized system access via user password guessing, also known as brute-forcing, is reduced. Limits are imposed by locking the account. -Satisfies: SRG-OS-000329-GPOS-00128, SRG-OS-000021-GPOS-00005</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000044CCI-002238Configure RHEL 9 to lock out the "root" account after a number of incorrect login attempts using "pam_faillock.so", first enable the feature using the following command: +Satisfies: SRG-OS-000329-GPOS-00128, SRG-OS-000021-GPOS-00005</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000044CCI-002238To configure RHEL 9 to lock out the "root" account after a number of incorrect logon attempts using "pam_faillock.so", first enable the feature using the following command: $ sudo authselect enable-feature with-faillock - Then edit the "/etc/security/faillock.conf" file as follows: +Edit the "/etc/security/faillock.conf" by uncommenting or adding the following line: - add or uncomment the following line: - even_deny_rootVerify RHEL 9 is configured to lock the root account after three unsuccessful logon attempts with the command: +even_deny_rootVerify RHEL 9 is configured to lock the root account after three unsuccessful logon attempts with the command: -$ grep even_deny_root /etc/security/faillock.conf +$ sudo grep even_deny_root /etc/security/faillock.conf even_deny_root -If the "even_deny_root" option is not set, is missing or commented out, this is a finding.SRG-OS-000329-GPOS-00128<GroupDescription></GroupDescription>RHEL-09-411085RHEL 9 must automatically lock an account when three unsuccessful logon attempts occur during a 15-minute time period.<VulnDiscussion>By limiting the number of failed logon attempts the risk of unauthorized system access via user password guessing, otherwise known as brute-forcing, is reduced. Limits are imposed by locking the account. +If the "even_deny_root" option is not set or is missing or commented out, this is a finding.SRG-OS-000329-GPOS-00128<GroupDescription></GroupDescription>RHEL-09-411085RHEL 9 must automatically lock an account when three unsuccessful logon attempts occur during a 15-minute time period.<VulnDiscussion>By limiting the number of failed logon attempts the risk of unauthorized system access via user password guessing, otherwise known as brute-forcing, is reduced. Limits are imposed by locking the account. -Satisfies: SRG-OS-000329-GPOS-00128, SRG-OS-000021-GPOS-00005</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000044CCI-002238To configure RHEL 9 to lock out the "root" account after a number of incorrect login attempts within 15 minutes using "pam_faillock.so", enable the feature using the following command: +Satisfies: SRG-OS-000329-GPOS-00128, SRG-OS-000021-GPOS-00005</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000044CCI-002238To configure RHEL 9 to lock out the "root" account after a number of incorrect logon attempts within 15 minutes using "pam_faillock.so", enable the feature using the following command: -$ authselect enable-feature with-faillock +$ sudo authselect enable-feature with-faillock Then edit the "/etc/security/faillock.conf" file as follows: -fail_interval = 900Verify RHEL 9 locks an account after three unsuccessful logon attempts within a period of 15 minutes with the following command: +fail_interval = 900Note: If the system administrator demonstrates the use of an approved centralized account management method that locks an account after three unsuccessful logon attempts within a period of 15 minutes, this requirement is Not Applicable. -Note: If the system administrator demonstrates the use of an approved centralized account management method that locks an account after three unsuccessful logon attempts within a period of 15 minutes, this requirement is Not Applicable. +Verify RHEL 9 locks an account after three unsuccessful logon attempts within a period of 15 minutes with the following command: -$ grep fail_interval /etc/security/faillock.conf +$ sudo grep fail_interval /etc/security/faillock.conf fail_interval = 900 -If the "fail_interval" option is not set to "900" or less (but not "0"), the line is commented out, or the line is missing, this is a finding.SRG-OS-000329-GPOS-00128<GroupDescription></GroupDescription>RHEL-09-411090RHEL 9 must maintain an account lock until the locked account is released by an administrator.<VulnDiscussion>By limiting the number of failed logon attempts the risk of unauthorized system access via user password guessing, otherwise known as brute-forcing, is reduced. Limits are imposed by locking the account. +If the "fail_interval" option is not set to "900" or less (but not "0"), the line is commented out, or the line is missing, this is a finding.SRG-OS-000329-GPOS-00128<GroupDescription></GroupDescription>RHEL-09-411090RHEL 9 must maintain an account lock until the locked account is released by an administrator.<VulnDiscussion>By limiting the number of failed logon attempts the risk of unauthorized system access via user password guessing, otherwise known as brute-forcing, is reduced. Limits are imposed by locking the account. -Satisfies: SRG-OS-000329-GPOS-00128, SRG-OS-000021-GPOS-00005</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000044CCI-002238Configure RHEL 9 to lock an account until released by an administrator after three unsuccessful logon attempts with the command: +Satisfies: SRG-OS-000329-GPOS-00128, SRG-OS-000021-GPOS-00005</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000044CCI-002238Configure RHEL 9 to lock an account until released by an administrator after three unsuccessful logon attempts with the command: -$ authselect enable-feature with-faillock +$ sudo authselect enable-feature with-faillock -Then edit the "/etc/security/faillock.conf" file as follows: +Edit the "/etc/security/faillock.conf" file as follows: -unlock_time = 0Verify RHEL 9 is configured to lock an account until released by an administrator after three unsuccessful logon attempts with the command: +unlock_time = 0Verify RHEL 9 is configured to lock an account until released by an administrator after three unsuccessful logon attempts with the command: -$ grep 'unlock_time =' /etc/security/faillock.conf +$ sudo grep -w unlock_time /etc/security/faillock.conf unlock_time = 0 -If the "unlock_time" option is not set to "0", the line is missing, or commented out, this is a finding.SRG-OS-000480-GPOS-00227<GroupDescription></GroupDescription>RHEL-09-411095RHEL 9 must not have unauthorized accounts.<VulnDiscussion>Accounts providing no operational purpose provide additional opportunities for system compromise. Unnecessary accounts include user accounts for individuals not requiring access to the system and application accounts for applications not installed on the system.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000366Remove unauthorized local interactive user accounts with the following command where <unauthorized_user> is the unauthorized account: +If the "unlock_time" option is not set to "0" or the line is missing or commented out, this is a finding.SRG-OS-000480-GPOS-00227<GroupDescription></GroupDescription>RHEL-09-411095RHEL 9 must not have unauthorized accounts.<VulnDiscussion>Accounts providing no operational purpose provide additional opportunities for system compromise. Unnecessary accounts include user accounts for individuals not requiring access to the system and application accounts for applications not installed on the system.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000366Remove unauthorized local interactive user accounts with the following command where <unauthorized_user> is the unauthorized account: -$ sudo userdel <unauthorized_user>Verify that there are no unauthorized interactive user accounts with the following command: +$ sudo userdel <unauthorized_user>Verify that there are no unauthorized interactive user accounts with the following command: $ less /etc/passwd @@ -4061,7 +4087,7 @@ games:x:12:100:games:/usr/games:/sbin/nologin scsaustin:x:1001:1001:scsaustin:/home/scsaustin:/bin/bash djohnson:x:1002:1002:djohnson:/home/djohnson:/bin/bash -Interactive user account, generally will have a user identifier (UID) of 1000 or greater, a home directory in a specific partition, and an interactive shell. +Interactive user accounts generally will have a user identifier (UID) of 1000 or greater, a home directory in a specific partition, and an interactive shell. Obtain the list of interactive user accounts authorized to be on the system from the system administrator or information system security officer (ISSO) and compare it to the list of local interactive user accounts on the system. @@ -4073,17 +4099,17 @@ $ awk -F: '$3 == 0 {print $1}' /etc/passwd root -If any accounts other than "root" have a UID of "0", this is a finding.SRG-OS-000021-GPOS-00005<GroupDescription></GroupDescription>RHEL-09-411105RHEL 9 must ensure account lockouts persist.<VulnDiscussion>Having lockouts persist across reboots ensures that account is only unlocked by an administrator. If the lockouts did not persist across reboots, an attacker could simply reboot the system to continue brute force attacks against the accounts on the system.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000044Configure RHEL 9 maintain the contents of the faillock directory after a reboot. +If any accounts other than "root" have a UID of "0", this is a finding.SRG-OS-000021-GPOS-00005<GroupDescription></GroupDescription>RHEL-09-411105RHEL 9 must ensure account lockouts persist.<VulnDiscussion>Having lockouts persist across reboots ensures that account is only unlocked by an administrator. If the lockouts did not persist across reboots, an attacker could simply reboot the system to continue brute force attacks against the accounts on the system.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000044Configure RHEL 9 maintain the contents of the faillock directory after a reboot. Add/modify the "/etc/security/faillock.conf" file to match the following line: -dir = /var/log/faillockVerify the "/etc/security/faillock.conf" file is configured use a nondefault faillock directory to ensure contents persist after reboot with the following command: +dir = /var/log/faillockVerify the "/etc/security/faillock.conf" file is configured to use a nondefault faillock directory to ensure contents persist after reboot with the following command: -$ grep 'dir =' /etc/security/faillock.conf +$ sudo grep -w dir /etc/security/faillock.conf dir = /var/log/faillock -If the "dir" option is not set to a nondefault documented tally log directory, is missing or commented out, this is a finding.SRG-OS-000104-GPOS-00051<GroupDescription></GroupDescription>RHEL-09-411110RHEL 9 groups must have unique Group ID (GID).<VulnDiscussion>To ensure accountability and prevent unauthenticated access, groups must be identified uniquely to prevent potential misuse and compromise of the system.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000764Edit the file "/etc/group" and provide each group that has a duplicate GID with a unique GID.Verify that RHEL 9 contains no duplicate GIDs for interactive users with the following command: +If the "dir" option is not set to a nondefault documented tally log directory or is missing or commented out, this is a finding.SRG-OS-000104-GPOS-00051<GroupDescription></GroupDescription>RHEL-09-411110RHEL 9 groups must have unique Group ID (GID).<VulnDiscussion>To ensure accountability and prevent unauthenticated access, groups must be identified uniquely to prevent potential misuse and compromise of the system.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000764Edit the file "/etc/group" and provide each group that has a duplicate GID with a unique GID.Verify that RHEL 9 contains no duplicate GIDs for interactive users with the following command: $ cut -d : -f 3 /etc/group | uniq -d @@ -4123,13 +4149,17 @@ $ grep -r -s maxlogins /etc/security/limits.conf /etc/security/limits.d/*.conf This can be set as a global domain (with the * wildcard) but may be set differently for multiple domains. -If the "maxlogins" item is missing, commented out, or the value is set greater than "10" and is not documented with the information system security officer (ISSO) as an operational requirement for all domains that have the "maxlogins" item assigned, this is a finding.SRG-OS-000021-GPOS-00005<GroupDescription></GroupDescription>RHEL-09-412045RHEL 9 must log username information when unsuccessful logon attempts occur.<VulnDiscussion>Without auditing of these events, it may be harder or impossible to identify what an attacker did after an attack.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000044Configure RHEL 9 to log username information when unsuccessful logon attempts occur. +If the "maxlogins" item is missing, commented out, or the value is set greater than "10" and is not documented with the information system security officer (ISSO) as an operational requirement for all domains that have the "maxlogins" item assigned, this is a finding.SRG-OS-000021-GPOS-00005<GroupDescription></GroupDescription>RHEL-09-412045RHEL 9 must log username information when unsuccessful logon attempts occur.<VulnDiscussion>Without auditing of these events, it may be harder or impossible to identify what an attacker did after an attack.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000044Configure RHEL 9 to log username information when unsuccessful logon attempts occur. +Enable the feature using the following command: + +$ sudo authselect enable-feature with-faillock + Add/modify the "/etc/security/faillock.conf" file to match the following line: -auditVerify the "/etc/security/faillock.conf" file is configured to log username information when unsuccessful logon attempts occur with the following command: +auditVerify the "/etc/security/faillock.conf" file is configured to log username information when unsuccessful logon attempts occur with the following command: -$ grep audit /etc/security/faillock.conf +$ sudo grep audit /etc/security/faillock.conf audit @@ -4143,35 +4173,33 @@ $ grep -i fail_delay /etc/login.defs FAIL_DELAY 4 -If the value of "FAIL_DELAY" is not set to "4" or greater, or the line is commented out, this is a finding.SRG-OS-000480-GPOS-00228<GroupDescription></GroupDescription>RHEL-09-412055RHEL 9 must define default permissions for the bash shell.<VulnDiscussion>The umask controls the default access mode assigned to newly created files. A umask of 077 limits new files to mode 600 or less permissive. Although umask can be represented as a four-digit number, the first digit representing special access modes is typically ignored or required to be "0". This requirement applies to the globally configured system defaults and the local interactive user defaults for each account on the system. +If the value of "FAIL_DELAY" is not set to "4" or greater, or the line is commented out, this is a finding.SRG-OS-000480-GPOS-00228<GroupDescription></GroupDescription>RHEL-09-412055RHEL 9 must define default permissions for the bash shell.<VulnDiscussion>The umask controls the default access mode assigned to newly created files. A umask of 077 limits new files to mode 600 or less permissive. Although umask can be represented as a four-digit number, the first digit representing special access modes is typically ignored or required to be "0". This requirement applies to the globally configured system defaults and the local interactive user defaults for each account on the system. Satisfies: SRG-OS-000480-GPOS-00228, SRG-OS-000480-GPOS-00227</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000366Configure RHEL 9 to define default permissions for all authenticated users using the bash shell. Add or edit the lines for the "umask" parameter in the "/etc/bashrc" file to "077": -umask 077Verify the "umask" setting is configured correctly in the "/etc/bashrc" file with the following command: +umask 077Verify the "umask" setting is configured correctly in the "/etc/bashrc" file with the following command: Note: If the value of the "umask" parameter is set to "000" "/etc/bashrc" file, the Severity is raised to a CAT I. $ grep umask /etc/bashrc -umask 077 -umask 077 +[ `umask` -eq 0 ] && umask 077 -If the value for the "umask" parameter is not "077", or the "umask" parameter is missing or is commented out, this is a finding.SRG-OS-000480-GPOS-00228<GroupDescription></GroupDescription>RHEL-09-412060RHEL 9 must define default permissions for the c shell.<VulnDiscussion>The umask controls the default access mode assigned to newly created files. A umask of 077 limits new files to mode 600 or less permissive. Although umask can be represented as a four-digit number, the first digit representing special access modes is typically ignored or required to be "0". This requirement applies to the globally configured system defaults and the local interactive user defaults for each account on the system. +If the value for the "umask" parameter is not "077", or the "umask" parameter is missing or is commented out, this is a finding.SRG-OS-000480-GPOS-00228<GroupDescription></GroupDescription>RHEL-09-412060RHEL 9 must define default permissions for the c shell.<VulnDiscussion>The umask controls the default access mode assigned to newly created files. A umask of 077 limits new files to mode 600 or less permissive. Although umask can be represented as a four-digit number, the first digit representing special access modes is typically ignored or required to be "0". This requirement applies to the globally configured system defaults and the local interactive user defaults for each account on the system. Satisfies: SRG-OS-000480-GPOS-00228, SRG-OS-000480-GPOS-00227</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000366Configure RHEL 9 to define default permissions for all authenticated users using the c shell. Add or edit the lines for the "umask" parameter in the "/etc/csh.cshrc" file to "077": -umask 077Verify the "umask" setting is configured correctly in the "/etc/csh.cshrc" file with the following command: +umask 077Verify the "umask" setting is configured correctly in the "/etc/csh.cshrc" file with the following command: Note: If the value of the "umask" parameter is set to "000" "/etc/csh.cshrc" file, the Severity is raised to a CAT I. $ grep umask /etc/csh.cshrc umask 077 -umask 077 If the value for the "umask" parameter is not "077", or the "umask" parameter is missing or is commented out, this is a finding.SRG-OS-000480-GPOS-00228<GroupDescription></GroupDescription>RHEL-09-412065RHEL 9 must define default permissions for all authenticated users in such a way that the user can only read and modify their own files.<VulnDiscussion>Setting the most restrictive default permissions ensures that when new accounts are created, they do not have unnecessary access.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000366Configure RHEL 9 to define default permissions for all authenticated users in such a way that the user can only read and modify their own files. @@ -4246,7 +4274,7 @@ grep "SELINUX=" /etc/selinux/config # NOTE: In earlier Fedora kernel builds, SELINUX=disabled would also SELINUX=enforcing -If SELINUX line is missing, commented out, or not set to "enforcing", this is a finding.SRG-OS-000445-GPOS-00199<GroupDescription></GroupDescription>RHEL-09-431015RHEL 9 must enable the SELinux targeted policy.<VulnDiscussion>Setting the SELinux policy to "targeted" or a more specialized policy ensures the system will confine processes that are likely to be targeted for exploitation, such as network or system services. +If SELINUX line is missing, commented out, or not set to "enforcing", this is a finding.SRG-OS-000445-GPOS-00199<GroupDescription></GroupDescription>RHEL-09-431015RHEL 9 must enable the SELinux targeted policy.<VulnDiscussion>Setting the SELinux policy to "targeted" or a more specialized policy ensures the system will confine processes that are likely to be targeted for exploitation, such as network or system services. Note: During the development or debugging of SELinux modules, it is common to temporarily place nonproduction systems in "permissive" mode. In such temporary cases, SELinux policies should be developed, and once work is completed, the system should be reconfigured to "targeted".</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-002696Configure RHEL 9 to use the targetd SELINUX policy. @@ -4254,29 +4282,37 @@ Edit the file "/etc/selinux/config" and add or modify the following line: SELINUXTYPE=targeted -A reboot is required for the changes to take effect.Verify the SELINUX on RHEL 9 is using the targeted policy with the following command: +A reboot is required for the changes to take effect.Verify the SELINUX on RHEL 9 is using the targeted policy with the following command: -$ sestatus | grep policy +$ sestatus | grep "policy name" Loaded policy name: targeted -If the loaded policy name is not "targeted", this is a finding.SRG-OS-000021-GPOS-00005<GroupDescription></GroupDescription>RHEL-09-431020RHEL 9 must configure SELinux context type to allow the use of a nondefault faillock tally directory.<VulnDiscussion>Not having the correct SELinux context on the faillock directory may lead to unauthorized access to the directory.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000044Configure RHEL 9 to allow the use of a nondefault faillock tally directory while SELinux enforces a targeted policy. +If the loaded policy name is not "targeted", this is a finding.SRG-OS-000021-GPOS-00005<GroupDescription></GroupDescription>RHEL-09-431020RHEL 9 must configure SELinux context type to allow the use of a nondefault faillock tally directory.<VulnDiscussion>Not having the correct SELinux context on the faillock directory may lead to unauthorized access to the directory.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000044Configure RHEL 9 to allow the use of a nondefault faillock tally directory while SELinux enforces a targeted policy. +First enable the feature using the following command: + +$ sudo authselect enable-feature with-faillock + Create a nondefault faillock tally directory (if it does not already exist) with the following example: $ sudo mkdir /var/log/faillock +Then add/modify the "/etc/security/faillock.conf" file to match the following line: + +dir = /var/log/faillock + Update the /etc/selinux/targeted/contexts/files/file_contexts.local with "faillog_t" context type for the nondefault faillock tally directory with the following command: $ sudo semanage fcontext -a -t faillog_t "/var/log/faillock(/.*)?" Next, update the context type of the nondefault faillock directory/subdirectories and files with the following command: -$ sudo restorecon -R -v /var/log/faillockVerify the location of the nondefault tally directory for the pam_faillock module with the following command: +$ sudo restorecon -R -v /var/log/faillockVerify the location of the nondefault tally directory for the pam_faillock module with the following command: Note: If the system does not have SELinux enabled and enforcing a targeted policy, or if the pam_faillock module is not configured for use, this requirement is Not Applicable. -$ grep 'dir =' /etc/security/faillock.conf +$ sudo grep -w dir /etc/security/faillock.conf dir = /var/log/faillock @@ -4286,63 +4322,63 @@ $ ls -Zd /var/log/faillock unconfined_u:object_r:faillog_t:s0 /var/log/faillock -If the security context type of the nondefault tally directory is not "faillog_t", this is a finding.SRG-OS-000480-GPOS-00227<GroupDescription></GroupDescription>RHEL-09-431025RHEL 9 must have policycoreutils package installed.<VulnDiscussion>Without verification of the security functions, security functions may not operate correctly and the failure may go unnoticed. Security function is defined as the hardware, software, and/or firmware of the information system responsible for enforcing the system security policy and supporting the isolation of code and data on which the protection is based. Security functionality includes, but is not limited to, establishing system accounts, configuring access authorizations (i.e., permissions, privileges), setting events to be audited, and setting intrusion detection parameters. +If the security context type of the nondefault tally directory is not "faillog_t", this is a finding.SRG-OS-000480-GPOS-00227<GroupDescription></GroupDescription>RHEL-09-431025RHEL 9 must have policycoreutils package installed.<VulnDiscussion>Without verification of the security functions, security functions may not operate correctly and the failure may go unnoticed. Security function is defined as the hardware, software, and/or firmware of the information system responsible for enforcing the system security policy and supporting the isolation of code and data on which the protection is based. Security functionality includes, but is not limited to, establishing system accounts, configuring access authorizations (i.e., permissions, privileges), setting events to be audited, and setting intrusion detection parameters. Policycoreutils contains the policy core utilities that are required for basic operation of an SELinux-enabled system. These utilities include load_policy to load SELinux policies, setfile to label filesystems, newrole to switch roles, and run_init to run /etc/init.d scripts in the proper context. -Satisfies: SRG-OS-000480-GPOS-00227, SRG-OS-000134-GPOS-00068</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000366CCI-001084The policycoreutils package can be installed with the following command: +Satisfies: SRG-OS-000480-GPOS-00227, SRG-OS-000134-GPOS-00068</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-001084The policycoreutils package can be installed with the following command: -$ sudo dnf install policycoreutilsVerify RHEL 9 has the policycoreutils package installed with the following command: +$ sudo dnf install policycoreutilsVerify RHEL 9 has the policycoreutils package installed with the following command: -$ sudo dnf list --installed policycoreutils +$ dnf list --installed policycoreutils Example output: policycoreutils.x86_64 3.3-6.el9_0 -If the "policycoreutils" package is not installed, this is a finding.SRG-OS-000480-GPOS-00227<GroupDescription></GroupDescription>RHEL-09-431030RHEL 9 policycoreutils-python-utils package must be installed.<VulnDiscussion>The policycoreutils-python-utils package is required to operate and manage an SELinux environment and its policies. It provides utilities such as semanage, audit2allow, audit2why, chcat, and sandbox.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000366Install the policycoreutils-python-utils service package (if the policycoreutils-python-utils service is not already installed) with the following command: +If the "policycoreutils" package is not installed, this is a finding.SRG-OS-000480-GPOS-00227<GroupDescription></GroupDescription>RHEL-09-431030RHEL 9 policycoreutils-python-utils package must be installed.<VulnDiscussion>The policycoreutils-python-utils package is required to operate and manage an SELinux environment and its policies. It provides utilities such as semanage, audit2allow, audit2why, chcat, and sandbox.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000366Install the policycoreutils-python-utils service package (if the policycoreutils-python-utils service is not already installed) with the following command: -$ sudo dnf install policycoreutils-python-utilsVerify that RHEL 9 policycoreutils-python-utils service package is installed with the following command: +$ sudo dnf install policycoreutils-python-utilsVerify that RHEL 9 policycoreutils-python-utils service package is installed with the following command: -$ sudo dnf list --installed policycoreutils-python-utils +$ dnf list --installed policycoreutils-python-utils Example output: policycoreutils-python-utils.noarch 3.3-6.el9_0 -If the "policycoreutils-python-utils" package is not installed, this is a finding.SRG-OS-000324-GPOS-00125<GroupDescription></GroupDescription>RHEL-09-432010RHEL 9 must have the sudo package installed.<VulnDiscussion>"sudo" is a program designed to allow a system administrator to give limited root privileges to users and log root activity. The basic philosophy is to give as few privileges as possible but still allow system users to get their work done.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-002235The sudo package can be installed with the following command: +If the "policycoreutils-python-utils" package is not installed, this is a finding.SRG-OS-000324-GPOS-00125<GroupDescription></GroupDescription>RHEL-09-432010RHEL 9 must have the sudo package installed.<VulnDiscussion>"sudo" is a program designed to allow a system administrator to give limited root privileges to users and log root activity. The basic philosophy is to give as few privileges as possible but still allow system users to get their work done.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-002235The sudo package can be installed with the following command: -$ sudo dnf install sudoVerify that RHEL 9 sudo package is installed with the following command: +$ sudo dnf install sudoVerify that RHEL 9 sudo package is installed with the following command: -$ sudo dnf list --installed sudo +$ dnf list --installed sudo Example output: sudo.x86_64 1.9.5p2-7.el9 -If the "sudo" package is not installed, this is a finding.SRG-OS-000373-GPOS-00156<GroupDescription></GroupDescription>RHEL-09-432015RHEL 9 must require reauthentication when using the "sudo" command.<VulnDiscussion>Without reauthentication, users may access resources or perform tasks for which they do not have authorization. +If the "sudo" package is not installed, this is a finding.SRG-OS-000373-GPOS-00156<GroupDescription></GroupDescription>RHEL-09-432015RHEL 9 must require reauthentication when using the "sudo" command.<VulnDiscussion>Without reauthentication, users may access resources or perform tasks for which they do not have authorization. When operating systems provide the capability to escalate a functional capability, it is critical the organization requires the user to reauthenticate when using the "sudo" command. -If the value is set to an integer less than "0", the user's time stamp will not expire and the user will not have to reauthenticate for privileged actions until the user's session is terminated.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-004895CCI-002038Configure RHEL 9 to reauthenticate "sudo" commands after the specified timeout: +If the value is set to an integer less than "0", the user's time stamp will not expire and the user will not have to reauthenticate for privileged actions until the user's session is terminated.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-004895CCI-002038Configure RHEL 9 to reauthenticate "sudo" commands after the specified timeout: -Add the following line to "/etc/sudoers": +Add the following line to "/etc/sudoers" or a file in "/etc/sudoers.d": -Defaults timestamp_timeout=0Verify RHEL 9 requires reauthentication when using the "sudo" command to elevate privileges with the following command: +Defaults timestamp_timeout=0Verify RHEL 9 requires reauthentication when using the "sudo" command to elevate privileges with the following command: -$ sudo grep -ir 'timestamp_timeout' /etc/sudoers /etc/sudoers.d/* +$ sudo grep -ir 'timestamp_timeout' /etc/sudoers /etc/sudoers.d/ /etc/sudoers:Defaults timestamp_timeout=0 If results are returned from more than one file location, this is a finding. -If "timestamp_timeout" is set to a negative number, is commented out, or no results are returned, this is a finding.SRG-OS-000480-GPOS-00227<GroupDescription></GroupDescription>RHEL-09-432020RHEL 9 must use the invoking user's password for privilege escalation when using "sudo".<VulnDiscussion>If the rootpw, targetpw, or runaspw flags are defined and not disabled, by default the operating system will prompt the invoking user for the "root" user password.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000366Define the following in the Defaults section of the /etc/sudoers file or a single configuration file in the /etc/sudoers.d/ directory: +If "timestamp_timeout" is set to a negative number, is commented out, or no results are returned, this is a finding.SRG-OS-000480-GPOS-00227<GroupDescription></GroupDescription>RHEL-09-432020RHEL 9 must use the invoking user's password for privilege escalation when using "sudo".<VulnDiscussion>If the rootpw, targetpw, or runaspw flags are defined and not disabled, by default the operating system will prompt the invoking user for the "root" user password.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000366Define the following in the Defaults section of the /etc/sudoers file or a single configuration file in the /etc/sudoers.d/ directory: Defaults !targetpw Defaults !rootpw -Defaults !runaspwVerify that the sudoers security policy is configured to use the invoking user's password for privilege escalation with the following command: +Defaults !runaspwVerify that the sudoers security policy is configured to use the invoking user's password for privilege escalation with the following command: -$ sudo egrep -ir '(!rootpw|!targetpw|!runaspw)' /etc/sudoers /etc/sudoers.d/* | grep -v '#' +$ sudo egrep -ir '(!rootpw|!targetpw|!runaspw)' /etc/sudoers /etc/sudoers.d/ | grep -v '#' /etc/sudoers:Defaults !targetpw /etc/sudoers:Defaults !rootpw @@ -4356,7 +4392,7 @@ If "Defaults !targetpw" is not defined, this is a finding. If "Defaults !rootpw" is not defined, this is a finding. -If "Defaults !runaspw" is not defined, this is a finding.SRG-OS-000373-GPOS-00156<GroupDescription></GroupDescription>RHEL-09-432025RHEL 9 must require users to reauthenticate for privilege escalation.<VulnDiscussion>Without reauthentication, users may access resources or perform tasks for which they do not have authorization. +If "Defaults !runaspw" is not defined, this is a finding.SRG-OS-000373-GPOS-00156<GroupDescription></GroupDescription>RHEL-09-432025RHEL 9 must require users to reauthenticate for privilege escalation.<VulnDiscussion>Without reauthentication, users may access resources or perform tasks for which they do not have authorization. When operating systems provide the capability to escalate a functional capability, it is critical that the user reauthenticate. @@ -4364,20 +4400,20 @@ Satisfies: SRG-OS-000373-GPOS-00156, SRG-OS-000373-GPOS-00157, SRG-OS-000373-GPO Remove any occurrence of "!authenticate" found in "/etc/sudoers" file or files in the "/etc/sudoers.d" directory. -$ sudo sed -i '/\!authenticate/ s/^/# /g' /etc/sudoers /etc/sudoers.d/*Verify that "/etc/sudoers" has no occurrences of "!authenticate" with the following command: +$ sudo sed -i '/\!authenticate/ s/^/# /g' /etc/sudoers /etc/sudoers.d/*Verify that "/etc/sudoers" has no occurrences of "!authenticate" with the following command: -$ sudo grep -ir '!authenticate' /etc/sudoers /etc/sudoers.d/* +$ sudo grep -ir '!authenticate' /etc/sudoers /etc/sudoers.d/ -If any occurrences of "!authenticate" are returned, this is a finding.SRG-OS-000480-GPOS-00227<GroupDescription></GroupDescription>RHEL-09-432030RHEL 9 must restrict privilege elevation to authorized personnel.<VulnDiscussion>If the "sudoers" file is not configured correctly, any user defined on the system can initiate privileged actions on the target system.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000366Remove the following entries from the /etc/sudoers file or configuration file under /etc/sudoers.d/: +If any occurrences of "!authenticate" are returned, this is a finding.SRG-OS-000480-GPOS-00227<GroupDescription></GroupDescription>RHEL-09-432030RHEL 9 must restrict privilege elevation to authorized personnel.<VulnDiscussion>If the "sudoers" file is not configured correctly, any user defined on the system can initiate privileged actions on the target system.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000366Remove the following entries from the /etc/sudoers file or configuration file under /etc/sudoers.d/: ALL ALL=(ALL) ALL -ALL ALL=(ALL:ALL) ALLVerify RHEL 9 restricts privilege elevation to authorized personnel with the following command: +ALL ALL=(ALL:ALL) ALLVerify RHEL 9 restricts privilege elevation to authorized personnel with the following command: -$ sudo sh -c 'grep -iw ALL /etc/sudoers /etc/sudoers.d/*' +$ sudo grep -riw ALL /etc/sudoers /etc/sudoers.d/ If the either of the following entries are returned, this is a finding: ALL ALL=(ALL) ALL -ALL ALL=(ALL:ALL) ALLSRG-OS-000373-GPOS-00156<GroupDescription></GroupDescription>RHEL-09-432035RHEL 9 must restrict the use of the "su" command.<VulnDiscussion>The "su" program allows to run commands with a substitute user and group ID. It is commonly used to run commands as the root user. Limiting access to such commands is considered a good security practice. +ALL ALL=(ALL:ALL) ALLSRG-OS-000373-GPOS-00156<GroupDescription></GroupDescription>RHEL-09-432035RHEL 9 must restrict the use of the "su" command.<VulnDiscussion>The "su" program allows to run commands with a substitute user and group ID. It is commonly used to run commands as the root user. Limiting access to such commands is considered a good security practice. Satisfies: SRG-OS-000373-GPOS-00156, SRG-OS-000312-GPOS-00123</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-004895CCI-002165CCI-002038Configure RHEL 9 to require users to be in the "wheel" group to run "su" command. @@ -4393,21 +4429,21 @@ $ grep pam_wheel /etc/pam.d/su auth required pam_wheel.so use_uid -If a line for "pam_wheel.so" does not exist, or is commented out, this is a finding.SRG-OS-000370-GPOS-00155<GroupDescription></GroupDescription>RHEL-09-433010RHEL 9 fapolicy module must be installed.<VulnDiscussion>The organization must identify authorized software programs and permit execution of authorized software. The process used to identify software programs that are authorized to execute on organizational information systems is commonly referred to as allowlisting. +If a line for "pam_wheel.so" does not exist, or is commented out, this is a finding.SRG-OS-000370-GPOS-00155<GroupDescription></GroupDescription>RHEL-09-433010RHEL 9 fapolicy module must be installed.<VulnDiscussion>The organization must identify authorized software programs and permit execution of authorized software. The process used to identify software programs that are authorized to execute on organizational information systems is commonly referred to as allow listing. -Utilizing an allowlist provides a configuration management method for allowing the execution of only authorized software. Using only authorized software decreases risk by limiting the number of potential vulnerabilities. Verification of allowlisted software occurs prior to execution or at system startup. +Utilizing an allow list provides a configuration management method for allowing the execution of only authorized software. Using only authorized software decreases risk by limiting the number of potential vulnerabilities. Verification of allow listed software occurs prior to execution or at system startup. User home directories/folders may contain information of a sensitive nature. Nonprivileged users should coordinate any sharing of information with an SA through shared resources. -RHEL 9 ships with many optional packages. One such package is a file access policy daemon called "fapolicyd". "fapolicyd" is a userspace daemon that determines access rights to files based on attributes of the process and file. It can be used to either blocklist or allowlist processes or file access. +RHEL 9 ships with many optional packages. One such package is a file access policy daemon called "fapolicyd". "fapolicyd" is a userspace daemon that determines access rights to files based on attributes of the process and file. It can be used to either blocklist or allow list processes or file access. Proceed with caution with enforcing the use of this daemon. Improper configuration may render the system nonfunctional. The "fapolicyd" API is not namespace aware and can cause issues when launching or running containers. Satisfies: SRG-OS-000370-GPOS-00155, SRG-OS-000368-GPOS-00154</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-001764CCI-001774The fapolicyd package can be installed with the following command: -$ sudo dnf install fapolicydVerify that RHEL 9 fapolicyd package is installed with the following command: +$ sudo dnf install fapolicydVerify that RHEL 9 fapolicyd package is installed with the following command: -$ sudo dnf list --installed fapolicyd +$ dnf list --installed fapolicyd Example output: @@ -4431,43 +4467,48 @@ $ systemctl is-active fapolicyd active -If fapolicyd module is not active, this is a finding.SRG-OS-000069-GPOS-00037<GroupDescription></GroupDescription>RHEL-09-611010RHEL 9 must ensure the password complexity module in the system-auth file is configured for three retries or less.<VulnDiscussion>Use of a complex password helps to increase the time and resources required to compromise the password. Password complexity, or strength, is a measure of the effectiveness of a password in resisting attempts at guessing and brute-force attacks. "pwquality" enforces complex password construction configuration and has the ability to limit brute-force attacks on the system. +If fapolicyd module is not active, this is a finding.SRG-OS-000069-GPOS-00037<GroupDescription></GroupDescription>RHEL-09-611010RHEL 9 must ensure the password complexity module in the system-auth file is configured for three retries or less.<VulnDiscussion>Use of a complex password helps to increase the time and resources required to compromise the password. Password complexity, or strength, is a measure of the effectiveness of a password in resisting attempts at guessing and brute-force attacks. "pwquality" enforces complex password construction configuration and has the ability to limit brute-force attacks on the system. RHEL 9 uses "pwquality" as a mechanism to enforce password complexity. This is set in both: /etc/pam.d/password-auth /etc/pam.d/system-auth -By limiting the number of attempts to meet the pwquality module complexity requirements before returning with an error, the system will audit abnormal attempts at password changes.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-004066CCI-000192Configure RHEL 9 to limit the "pwquality" retry option to "3". - -Add the following line to the "/etc/pam.d/system-auth" file (or modify the line to have the required value): - -password required pam_pwquality.so retry=3Verify RHEL 9 is configured to limit the "pwquality" retry option to "3". +By limiting the number of attempts to meet the pwquality module complexity requirements before returning with an error, the system will audit abnormal attempts at password changes.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-004066CCI-000192Configure RHEL 9 to limit the "pwquality" retry option to "3". -Check for the use of the "pwquality" retry option in the system-auth file with the following command: - -$ cat /etc/pam.d/system-auth | grep pam_pwquality +Add or update the following line in the "/etc/security/pwquality.conf" file or a file in the "/etc/security/pwquality.conf.d/" directory to contain the "retry" parameter: + +retry = 3Verify RHEL 9 is configured to limit the "pwquality" retry option to "3". -password required pam_pwquality.so retry=3 +Check for the use of the retry option in the security directory with the following command: -If the value of "retry" is set to "0" or greater than "3", or is missing, this is a finding. +$ grep -w retry /etc/security/pwquality.conf /etc/security/pwquality.conf.d/*.conf + +retry = 3 + +If the value of "retry" is set to "0" or greater than "3", or is missing, this is a finding.SRG-OS-000480-GPOS-00227<GroupDescription></GroupDescription>RHEL-09-611025RHEL 9 must not allow blank or null passwords.<VulnDiscussion>If an account has an empty password, anyone could log in and run commands with the privileges of that account. Accounts with empty passwords should never be used in operational environments.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000366If PAM is managed with authselect, use the following command to remove instances of "nullok": + +$ sudo authselect enable-feature without-nullok -If the system administrator (SA) can demonstrate that the required configuration is contained in a PAM configuration file included or substacked from the system-auth file, this is not a finding.SRG-OS-000480-GPOS-00227<GroupDescription></GroupDescription>RHEL-09-611025RHEL 9 must not allow blank or null passwords.<VulnDiscussion>If an account has an empty password, anyone could log in and run commands with the privileges of that account. Accounts with empty passwords should never be used in operational environments.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000366Remove any instances of the "nullok" option in the "/etc/pam.d/password-auth" and "/etc/pam.d/system-auth" files to prevent logons with empty passwords. +Otherwise, remove any instances of the "nullok" option in the "/etc/pam.d/password-auth" and "/etc/pam.d/system-auth" files to prevent logons with empty passwords. -Note: Manual changes to the listed file may be overwritten by the "authselect" program.Verify that null passwords cannot be used with the following command: +Note: Manual changes to the listed file may be overwritten by the "authselect" program.Verify that null passwords cannot be used with the following command: $ sudo grep -i nullok /etc/pam.d/system-auth /etc/pam.d/password-auth If output is produced, this is a finding. -If the system administrator (SA) can demonstrate that the required configuration is contained in a PAM configuration file included or substacked from the system-auth file, this is not a finding.SRG-OS-000021-GPOS-00005<GroupDescription></GroupDescription>RHEL-09-611030RHEL 9 must configure the use of the pam_faillock.so module in the /etc/pam.d/system-auth file.<VulnDiscussion>If the pam_faillock.so module is not loaded, the system will not correctly lockout accounts to prevent password guessing attacks.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000044Configure RHEL 9 to include the use of the pam_faillock.so module in the /etc/pam.d/system-auth file. +If the system administrator (SA) can demonstrate that the required configuration is contained in a PAM configuration file included or substacked from the system-auth file, this is not a finding.SRG-OS-000021-GPOS-00005<GroupDescription></GroupDescription>RHEL-09-611030RHEL 9 must configure the use of the pam_faillock.so module in the /etc/pam.d/system-auth file.<VulnDiscussion>If the pam_faillock.so module is not loaded, the system will not correctly lockout accounts to prevent password guessing attacks.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000044Configure RHEL 9 to include the use of the pam_faillock.so module in the /etc/pam.d/system-auth file. -Add/modify the appropriate sections of the "/etc/pam.d/system-auth" file to match the following lines: +If PAM is managed with authselect, enable the feature with the following command: + +$ sudo authselect enable-feature with-faillock + +Otherwise, add/modify the appropriate sections of the "/etc/pam.d/system-auth" file to match the following lines: Note: The "preauth" line must be listed before pam_unix.so. auth required pam_faillock.so preauth auth required pam_faillock.so authfail -account required pam_faillock.so -auth required pam_deny.soVerify the pam_faillock.so module is present in the "/etc/pam.d/system-auth" file: +account required pam_faillock.soVerify the pam_faillock.so module is present in the "/etc/pam.d/system-auth" file: $ grep pam_faillock.so /etc/pam.d/system-auth @@ -4477,14 +4518,16 @@ account required pam_faillock.so If the pam_faillock.so module is not present in the "/etc/pam.d/system-auth" file with the "preauth" line listed before pam_unix.so, this is a finding. -If the system administrator (SA) can demonstrate that the required configuration is contained in a PAM configuration file included or substacked from the system-auth file, this is not a finding.SRG-OS-000021-GPOS-00005<GroupDescription></GroupDescription>RHEL-09-611035RHEL 9 must configure the use of the pam_faillock.so module in the /etc/pam.d/password-auth file.<VulnDiscussion>If the pam_faillock.so module is not loaded, the system will not correctly lockout accounts to prevent password guessing attacks.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000044Configure RHEL 9 to include the use of the pam_faillock.so module in the /etc/pam.d/password-auth file. +If the system administrator (SA) can demonstrate that the required configuration is contained in a PAM configuration file included or substacked from the system-auth file, this is not a finding.SRG-OS-000021-GPOS-00005<GroupDescription></GroupDescription>RHEL-09-611035RHEL 9 must configure the use of the pam_faillock.so module in the /etc/pam.d/password-auth file.<VulnDiscussion>If the pam_faillock.so module is not loaded, the system will not correctly lockout accounts to prevent password guessing attacks.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000044Configure RHEL 9 to include the use of the pam_faillock.so module in the /etc/pam.d/password-auth file. If PAM is managed with authselect, enable the feature with the following command: + +$ sudo authselect enable-feature with-faillock -Add/modify the appropriate sections of the "/etc/pam.d/password-auth" file to match the following lines: +Otherwise, add/modify the appropriate sections of the "/etc/pam.d/password-auth" file to match the following lines: Note: The "preauth" line must be listed before pam_unix.so. auth required pam_faillock.so preauth auth required pam_faillock.so authfail -account required pam_faillock.soVerify the pam_faillock.so module is present in the "/etc/pam.d/password-auth" file: +account required pam_faillock.soVerify the pam_faillock.so module is present in the "/etc/pam.d/password-auth" file: $ grep pam_faillock.so /etc/pam.d/password-auth @@ -4494,107 +4537,107 @@ account required pam_faillock.so If the pam_faillock.so module is not present in the "/etc/pam.d/password-auth" file with the "preauth" line listed before pam_unix.so, this is a finding. -If the system administrator (SA) can demonstrate that the required configuration is contained in a PAM configuration file included or substacked from the system-auth file, this is not a finding.SRG-OS-000069-GPOS-00037<GroupDescription></GroupDescription>RHEL-09-611040RHEL 9 must ensure the password complexity module is enabled in the password-auth file.<VulnDiscussion>Enabling PAM password complexity permits enforcement of strong passwords and consequently makes the system less prone to dictionary attacks. +If the system administrator (SA) can demonstrate that the required configuration is contained in a PAM configuration file included or substacked from the system-auth file, this is not a finding.SRG-OS-000069-GPOS-00037<GroupDescription></GroupDescription>RHEL-09-611040RHEL 9 must ensure the password complexity module is enabled in the password-auth file.<VulnDiscussion>Enabling PAM password complexity permits enforcement of strong passwords and consequently makes the system less prone to dictionary attacks. Satisfies: SRG-OS-000069-GPOS-00037, SRG-OS-000070-GPOS-00038, SRG-OS-000480-GPOS-00227</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-004066CCI-000192CCI-000193Configure RHEL 9 to use "pwquality" to enforce password complexity rules. Add the following line to the "/etc/pam.d/password-auth" file (or modify the line to have the required value): -password required pam_pwquality.soVerify RHEL 9 uses "pwquality" to enforce the password complexity rules in the password-auth file with the following command: +password required pam_pwquality.soVerify RHEL 9 uses "pwquality" to enforce the password complexity rules in the password-auth file with the following command: -$ cat /etc/pam.d/password-auth | grep pam_pwquality +$ grep pam_pwquality /etc/pam.d/password-auth password required pam_pwquality.so If the command does not return a line containing the value "pam_pwquality.so", or the line is commented out, this is a finding. -If the system administrator (SA) can demonstrate that the required configuration is contained in a PAM configuration file included or substacked from the system-auth file, this is not a finding.SRG-OS-000480-GPOS-00227<GroupDescription></GroupDescription>RHEL-09-611045RHEL 9 must ensure the password complexity module is enabled in the system-auth file.<VulnDiscussion>Enabling PAM password complexity permits enforcement of strong passwords and consequently makes the system less prone to dictionary attacks.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000366Configure RHEL 9 to use "pwquality" to enforce password complexity rules. +If the system administrator (SA) can demonstrate that the required configuration is contained in a PAM configuration file included or substacked from the system-auth file, this is not a finding.SRG-OS-000480-GPOS-00227<GroupDescription></GroupDescription>RHEL-09-611045RHEL 9 must ensure the password complexity module is enabled in the system-auth file.<VulnDiscussion>Enabling PAM password complexity permits enforcement of strong passwords and consequently makes the system less prone to dictionary attacks.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000366Configure RHEL 9 to use "pwquality" to enforce password complexity rules. Add the following line to the "/etc/pam.d/system-auth" file(or modify the line to have the required value): -password required pam_pwquality.soVerify RHEL 9 uses "pwquality" to enforce the password complexity rules in the system-auth file with the following command: +password required pam_pwquality.soVerify RHEL 9 uses "pwquality" to enforce the password complexity rules in the system-auth file with the following command: -$ cat /etc/pam.d/system-auth | grep pam_pwquality +$ grep pam_pwquality /etc/pam.d/system-auth password required pam_pwquality.so If the command does not return a line containing the value "pam_pwquality.so", or the line is commented out, this is a finding. -If the system administrator (SA) can demonstrate that the required configuration is contained in a PAM configuration file included or substacked from the system-auth file, this is not a finding.SRG-OS-000073-GPOS-00041<GroupDescription></GroupDescription>RHEL-09-611050RHEL 9 password-auth must be configured to use a sufficient number of hashing rounds.<VulnDiscussion>Passwords need to be protected at all times, and encryption is the standard method for protecting passwords. If passwords are not encrypted, they can be plainly read (i.e., clear text) and easily compromised. Passwords that are encrypted with a weak algorithm are no more protected than if they are kept in plain text. +If the system administrator (SA) can demonstrate that the required configuration is contained in a PAM configuration file included or substacked from the system-auth file, this is not a finding.SRG-OS-000073-GPOS-00041<GroupDescription></GroupDescription>RHEL-09-611050RHEL 9 password-auth must be configured to use a sufficient number of hashing rounds.<VulnDiscussion>Passwords need to be protected at all times, and encryption is the standard method for protecting passwords. If passwords are not encrypted, they can be plainly read (i.e., clear text) and easily compromised. Passwords that are encrypted with a weak algorithm are no more protected than if they are kept in plain text. Using more hashing rounds makes password cracking attacks more difficult. -Satisfies: SRG-OS-000073-GPOS-00041, SRG-OS-000120-GPOS-00061</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-004062CCI-000803CCI-000196Configure Red Hat Enterprise Linux 9 to use 5000 hashing rounds for hashing passwords. +Satisfies: SRG-OS-000073-GPOS-00041, SRG-OS-000120-GPOS-00061</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-004062CCI-000803CCI-000196Configure RHEL 9 to use 100000 hashing rounds for hashing passwords. -Add or modify the following line in "/etc/pam.d/password-auth" and set "rounds" to "5000". +Add or modify the following line in "/etc/pam.d/password-auth" and set "rounds" to "100000". -password sufficient pam_unix.so sha512 rounds=5000Verify the number of rounds for the password hashing algorithm is configured with the following command: +password sufficient pam_unix.so sha512 rounds=100000 -$ sudo grep rounds /etc/pam.d/password-auth +Note: Running authselect will overwrite this value unless a custom authselect policy is created.Verify the number of rounds for the password hashing algorithm is configured with the following command: -password sufficient pam_unix.so sha512 rounds=5000 +$ grep rounds /etc/pam.d/password-auth -If a matching line is not returned or "rounds" is less than "5000", this a finding. +password sufficient pam_unix.so sha512 rounds=100000 -If the system administrator (SA) can demonstrate that the required configuration is contained in a PAM configuration file included or substacked from the system-auth file, this is not a finding.SRG-OS-000073-GPOS-00041<GroupDescription></GroupDescription>RHEL-09-611055RHEL 9 system-auth must be configured to use a sufficient number of hashing rounds.<VulnDiscussion>Passwords need to be protected at all times, and encryption is the standard method for protecting passwords. If passwords are not encrypted, they can be plainly read (i.e., clear text) and easily compromised. Passwords that are encrypted with a weak algorithm are no more protected than if they are kept in plain text. +If a matching line is not returned or "rounds" is less than "100000", this a finding.SRG-OS-000073-GPOS-00041<GroupDescription></GroupDescription>RHEL-09-611055RHEL 9 system-auth must be configured to use a sufficient number of hashing rounds.<VulnDiscussion>Passwords need to be protected at all times, and encryption is the standard method for protecting passwords. If passwords are not encrypted, they can be plainly read (i.e., clear text) and easily compromised. Passwords that are encrypted with a weak algorithm are no more protected than if they are kept in plain text. Using more hashing rounds makes password cracking attacks more difficult. -Satisfies: SRG-OS-000073-GPOS-00041, SRG-OS-000120-GPOS-00061</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-004062CCI-000803CCI-000196Configure Red Hat Enterprise Linux 9 to use 5000 hashing rounds for hashing passwords. +Satisfies: SRG-OS-000073-GPOS-00041, SRG-OS-000120-GPOS-00061</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-004062CCI-000803CCI-000196Configure RHEL 9 to use 100000 hashing rounds for hashing passwords. -Add or modify the following line in "/etc/pam.d/system-auth" and set "rounds" to 5000. +Add or modify the following line in "/etc/pam.d/system-auth" and set "rounds" to 100000. -password sufficient pam_unix.so sha512 rounds=5000'Verify the number of rounds for the password hashing algorithm is configured with the following command: +password sufficient pam_unix.so sha512 rounds=100000 -$ sudo grep rounds /etc/pam.d/system-auth +Note: Running authselect will overwrite this value unless a custom authselect policy is created. Verify the number of rounds for the password hashing algorithm is configured with the following command: -password sufficient pam_unix.so sha512 rounds=5000 +$ sudo grep rounds /etc/pam.d/system-auth -If a matching line is not returned or "rounds" is less than 5000, this a finding. +password sufficient pam_unix.so sha512 rounds=100000 -If the system administrator (SA) can demonstrate that the required configuration is contained in a PAM configuration file included or substacked from the system-auth file, this is not a finding.SRG-OS-000072-GPOS-00040<GroupDescription></GroupDescription>RHEL-09-611060RHEL 9 must enforce password complexity rules for the root account.<VulnDiscussion>Use of a complex password helps to increase the time and resources required to compromise the password. Password complexity, or strength, is a measure of the effectiveness of a password in resisting attempts at guessing and brute-force attacks. +If a matching line is not returned or "rounds" is less than 100000, this a finding.SRG-OS-000072-GPOS-00040<GroupDescription></GroupDescription>RHEL-09-611060RHEL 9 must enforce password complexity rules for the root account.<VulnDiscussion>Use of a complex password helps to increase the time and resources required to compromise the password. Password complexity, or strength, is a measure of the effectiveness of a password in resisting attempts at guessing and brute-force attacks. Password complexity is one factor of several that determines how long it takes to crack a password. The more complex the password, the greater the number of possible combinations that need to be tested before the password is compromised. -Satisfies: SRG-OS-000072-GPOS-00040, SRG-OS-000071-GPOS-00039, SRG-OS-000070-GPOS-00038, SRG-OS-000266-GPOS-00101, SRG-OS-000078-GPOS-00046, SRG-OS-000480-GPOS-00225, SRG-OS-000069-GPOS-00037</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-004066CCI-000192CCI-000193CCI-000194CCI-000195CCI-000205CCI-001619Configure RHEL 9 to enforce password complexity on the root account. +Satisfies: SRG-OS-000072-GPOS-00040, SRG-OS-000071-GPOS-00039, SRG-OS-000070-GPOS-00038, SRG-OS-000266-GPOS-00101, SRG-OS-000078-GPOS-00046, SRG-OS-000480-GPOS-00225, SRG-OS-000069-GPOS-00037</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-004066CCI-000192CCI-000193CCI-000194CCI-000195CCI-000205CCI-001619Configure RHEL 9 to enforce password complexity on the root account. -Add or update the following line in /etc/security/pwquality.conf: +Add or update the following line in the "/etc/security/pwquality.conf" file or a configuration file in the "/etc/security/pwquality.conf.d/" directory to contain the "enforce_for_root" parameter: -enforce_for_rootVerify that RHEL 9 enforces password complexity rules for the root account. +enforce_for_rootVerify that RHEL 9 enforces password complexity rules for the root account. Check if root user is required to use complex passwords with the following command: -$ grep enforce_for_root /etc/security/pwquality.conf /etc/security/pwquality.conf/*.conf +$ grep enforce_for_root /etc/security/pwquality.conf /etc/security/pwquality.conf.d/*.conf /etc/security/pwquality.conf:enforce_for_root -If "enforce_for_root" is commented or missing, this is a finding.SRG-OS-000070-GPOS-00038<GroupDescription></GroupDescription>RHEL-09-611065RHEL 9 must enforce password complexity by requiring that at least one lowercase character be used.<VulnDiscussion>Use of a complex password helps to increase the time and resources required to compromise the password. Password complexity, or strength, is a measure of the effectiveness of a password in resisting attempts at guessing and brute-force attacks. +If "enforce_for_root" is commented or missing, this is a finding.SRG-OS-000070-GPOS-00038<GroupDescription></GroupDescription>RHEL-09-611065RHEL 9 must enforce password complexity by requiring that at least one lowercase character be used.<VulnDiscussion>Use of a complex password helps to increase the time and resources required to compromise the password. Password complexity, or strength, is a measure of the effectiveness of a password in resisting attempts at guessing and brute-force attacks. -Password complexity is one factor of several that determines how long it takes to crack a password. The more complex the password, the greater the number of possible combinations that need to be tested before the password is compromised. Requiring a minimum number of lowercase characters makes password guessing attacks more difficult by ensuring a larger search space.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-004066CCI-000193Configure RHEL 9 to enforce password complexity by requiring at least one lowercase character be used by setting the "lcredit" option. +Password complexity is one factor of several that determines how long it takes to crack a password. The more complex the password, the greater the number of possible combinations that need to be tested before the password is compromised. Requiring a minimum number of lowercase characters makes password guessing attacks more difficult by ensuring a larger search space.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-004066CCI-000193Configure RHEL 9 to enforce password complexity by requiring at least one lowercase character be used by setting the "lcredit" option. -Add the following line to "/etc/security/pwquality.conf" (or modify the line to have the required value): +Add or update the following line in the "/etc/security/pwquality.conf" file or a configuration file in the "/etc/security/pwquality.conf.d/" directory to contain the "lcredit" parameter: -lcredit = -1Verify that RHEL 9 enforces password complexity by requiring at least one lowercase character. +lcredit = -1Verify that RHEL 9 enforces password complexity by requiring at least one lowercase character. Check the value for "lcredit" with the following command: -$ sudo grep lcredit /etc/security/pwquality.conf /etc/security/pwquality.conf/*.conf +$ grep lcredit /etc/security/pwquality.conf /etc/security/pwquality.conf.d/*.conf -/etc/security/pwquality.conf:lcredit = -1 +/etc/security/pwquality.conf:lcredit = -1 -If the value of "lcredit" is a positive number or is commented out, this is a finding.SRG-OS-000071-GPOS-00039<GroupDescription></GroupDescription>RHEL-09-611070RHEL 9 must enforce password complexity by requiring that at least one numeric character be used.<VulnDiscussion>Use of a complex password helps to increase the time and resources required to compromise the password. Password complexity, or strength, is a measure of the effectiveness of a password in resisting attempts at guessing and brute-force attacks. +If the value of "lcredit" is a positive number or is commented out, this is a finding.SRG-OS-000071-GPOS-00039<GroupDescription></GroupDescription>RHEL-09-611070RHEL 9 must enforce password complexity by requiring that at least one numeric character be used.<VulnDiscussion>Use of a complex password helps to increase the time and resources required to compromise the password. Password complexity, or strength, is a measure of the effectiveness of a password in resisting attempts at guessing and brute-force attacks. -Password complexity is one factor of several that determines how long it takes to crack a password. The more complex the password, the greater the number of possible combinations that need to be tested before the password is compromised. Requiring digits makes password guessing attacks more difficult by ensuring a larger search space.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-004066CCI-000194Configure RHEL 9 to enforce password complexity by requiring at least one numeric character be used by setting the "dcredit" option. +Password complexity is one factor of several that determines how long it takes to crack a password. The more complex the password, the greater the number of possible combinations that need to be tested before the password is compromised. Requiring digits makes password guessing attacks more difficult by ensuring a larger search space.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-004066CCI-000194Configure RHEL 9 to enforce password complexity by requiring at least one numeric character be used by setting the "dcredit" option. -Add the following line to "/etc/security/pwquality.conf" (or modify the line to have the required value): +Add or update the following line in the "/etc/security/pwquality.conf" file or a configuration file in the "/etc/security/pwquality.conf.d/" directory to contain the "dcredit" parameter: -dcredit = -1Verify that RHEL 9 enforces password complexity by requiring at least one numeric character. +dcredit = -1Verify that RHEL 9 enforces password complexity by requiring at least one numeric character. Check the value for "dcredit" with the following command: -$ sudo grep dcredit /etc/security/pwquality.conf /etc/security/pwquality.conf/*.conf +$ grep dcredit /etc/security/pwquality.conf /etc/security/pwquality.conf.d/*.conf -/etc/security/pwquality.conf:dcredit = -1 +/etc/security/pwquality.conf:dcredit = -1 If the value of "dcredit" is a positive number or is commented out, this is a finding.SRG-OS-000075-GPOS-00043<GroupDescription></GroupDescription>RHEL-09-611075RHEL 9 passwords for new users or password changes must have a 24 hours minimum password lifetime restriction in /etc/login.defs.<VulnDiscussion>Enforcing a minimum password lifetime helps to prevent repeated password changes to defeat the password reuse or history enforcement requirement. If users are allowed to immediately and continually change their password, then the password could be repeatedly changed in a short period of time to defeat the organization's policy regarding password reuse. @@ -4610,25 +4653,25 @@ $ grep -i pass_min_days /etc/login.defs PASS_MIN_DAYS 1 -If the "PASS_MIN_DAYS" parameter value is not "1" or greater, or is commented out, this is a finding.SRG-OS-000075-GPOS-00043<GroupDescription></GroupDescription>RHEL-09-611080RHEL 9 passwords must have a 24 hours minimum password lifetime restriction in /etc/shadow.<VulnDiscussion>Enforcing a minimum password lifetime helps to prevent repeated password changes to defeat the password reuse or history enforcement requirement. If users are allowed to immediately and continually change their password, the password could be repeatedly changed in a short period of time to defeat the organization's policy regarding password reuse.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-004066CCI-000198Configure noncompliant accounts to enforce a 24 hour minimum password lifetime: +If the "PASS_MIN_DAYS" parameter value is not "1" or greater, or is commented out, this is a finding.SRG-OS-000075-GPOS-00043<GroupDescription></GroupDescription>RHEL-09-611080RHEL 9 passwords must have a 24 hours minimum password lifetime restriction in /etc/shadow.<VulnDiscussion>Enforcing a minimum password lifetime helps to prevent repeated password changes to defeat the password reuse or history enforcement requirement. If users are allowed to immediately and continually change their password, the password could be repeatedly changed in a short period of time to defeat the organization's policy regarding password reuse.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-004066CCI-000198Configure noncompliant accounts to enforce a 24 hour minimum password lifetime: -$ sudo passwd -n 1 [user]Verify that RHEL 9 has configured the minimum time period between password changes for each user account as one day or greater with the following command: +$ sudo passwd -n 1 [user]Verify that RHEL 9 has configured the minimum time period between password changes for each user account as one day or greater with the following command: -$ sudo awk -F: '$4 < 1 {print $1 " " $4}' /etc/shadow +$ sudo awk -F: '$4 < 1 {printf "%s %d\n", $1, $4}' /etc/shadow -If any results are returned that are not associated with a system account, this is a finding.SRG-OS-000373-GPOS-00156<GroupDescription></GroupDescription>RHEL-09-611085RHEL 9 must require users to provide a password for privilege escalation.<VulnDiscussion>Without reauthentication, users may access resources or perform tasks for which they do not have authorization. +If any results are returned that are not associated with a system account, this is a finding.SRG-OS-000373-GPOS-00156<GroupDescription></GroupDescription>RHEL-09-611085RHEL 9 must require users to provide a password for privilege escalation.<VulnDiscussion>Without reauthentication, users may access resources or perform tasks for which they do not have authorization. When operating systems provide the capability to escalate a functional capability, it is critical that the user reauthenticate. -Satisfies: SRG-OS-000373-GPOS-00156, SRG-OS-000373-GPOS-00157, SRG-OS-000373-GPOS-00158</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-004895CCI-002038Configure RHEL 9 to not allow users to execute privileged actions without authenticating with a password. +Satisfies: SRG-OS-000373-GPOS-00156, SRG-OS-000373-GPOS-00157, SRG-OS-000373-GPOS-00158</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-004895CCI-002038Configure RHEL 9 to not allow users to execute privileged actions without authenticating with a password. Remove any occurrence of "NOPASSWD" found in "/etc/sudoers" file or files in the "/etc/sudoers.d" directory. -$ sudo sed -i '/NOPASSWD/ s/^/# /g' /etc/sudoers /etc/sudoers.d/*Verify that "/etc/sudoers" has no occurrences of "NOPASSWD" with the following command: +$ sudo find /etc/sudoers /etc/sudoers.d -type f -exec sed -i '/NOPASSWD/ s/^/# /g' {} \;Verify that "/etc/sudoers" has no occurrences of "NOPASSWD" with the following command: -$ sudo grep -ri nopasswd /etc/sudoers /etc/sudoers.d/* +$ sudo grep -ri nopasswd /etc/sudoers /etc/sudoers.d/ -If any occurrences of "NOPASSWD" are returned from the command and have not been documented with the information system security officer (ISSO) as an organizationally defined administrative group utilizing MFA, this is a finding.SRG-OS-000078-GPOS-00046<GroupDescription></GroupDescription>RHEL-09-611090RHEL 9 passwords must be created with a minimum of 15 characters.<VulnDiscussion>The shorter the password, the lower the number of possible combinations that need to be tested before the password is compromised. +If any occurrences of "NOPASSWD" are returned from the command and have not been documented with the information system security officer (ISSO) as an organizationally defined administrative group using MFA, this is a finding.SRG-OS-000078-GPOS-00046<GroupDescription></GroupDescription>RHEL-09-611090RHEL 9 passwords must be created with a minimum of 15 characters.<VulnDiscussion>The shorter the password, the lower the number of possible combinations that need to be tested before the password is compromised. Password complexity, or strength, is a measure of the effectiveness of a password in resisting attempts at guessing and brute-force attacks. Password length is one factor of several that helps to determine strength and how long it takes to crack a password. Use of more characters in a password helps to increase exponentially the time and/or resources required to compromise the password. @@ -4636,105 +4679,105 @@ RHEL 9 uses "pwquality" as a mechanism to enforce password complexity. Configura The "minlen", sometimes noted as minimum length, acts as a "score" of complexity based on the credit components of the "pwquality" module. By setting the credit components to a negative value, not only will those components be required, but they will not count toward the total "score" of "minlen". This will enable "minlen" to require a 15-character minimum. -The DOD minimum password requirement is 15 characters.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-004066CCI-000205Configure RHEL 9 to enforce a minimum 15-character password length. +The DOD minimum password requirement is 15 characters.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-004066CCI-000205Configure RHEL 9 to enforce a minimum 15-character password length. -Add the following line to "/etc/security/pwquality.conf" (or modify the line to have the required value): +Add or update the following line in the "/etc/security/pwquality.conf" file or a configuration file in the "/etc/security/pwquality.conf.d/" directory to contain the "minlen" parameter: -minlen = 15Verify that RHEL 9 enforces a minimum 15-character password length with the following command: +minlen = 15Verify that RHEL 9 enforces a minimum 15-character password length with the following command: -$ grep minlen /etc/security/pwquality.conf +$ grep minlen /etc/security/pwquality.conf /etc/security/pwquality.conf.d/*.conf minlen = 15 -If the command does not return a "minlen" value of "15" or greater, does not return a line, or the line is commented out, this is a finding.SRG-OS-000266-GPOS-00101<GroupDescription></GroupDescription>RHEL-09-611100RHEL 9 must enforce password complexity by requiring that at least one special character be used.<VulnDiscussion>Use of a complex password helps to increase the time and resources required to compromise the password. Password complexity, or strength, is a measure of the effectiveness of a password in resisting attempts at guessing and brute-force attacks. Password complexity is one factor of several that determines how long it takes to crack a password. The more complex the password, the greater the number of possible combinations that need to be tested before the password is compromised. RHEL 9 utilizes "pwquality" as a mechanism to enforce password complexity. Note that to require special characters without degrading the "minlen" value, the credit value must be expressed as a negative number in "/etc/security/pwquality.conf".</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-004066CCI-001619Configure RHEL 9 to enforce password complexity by requiring at least one special character be used by setting the "ocredit" option. +If the command does not return a "minlen" value of "15" or greater, does not return a line, or the line is commented out, this is a finding.SRG-OS-000266-GPOS-00101<GroupDescription></GroupDescription>RHEL-09-611100RHEL 9 must enforce password complexity by requiring that at least one special character be used.<VulnDiscussion>Use of a complex password helps to increase the time and resources required to compromise the password. Password complexity, or strength, is a measure of the effectiveness of a password in resisting attempts at guessing and brute-force attacks. Password complexity is one factor of several that determines how long it takes to crack a password. The more complex the password, the greater the number of possible combinations that need to be tested before the password is compromised. RHEL 9 utilizes "pwquality" as a mechanism to enforce password complexity. Note that to require special characters without degrading the "minlen" value, the credit value must be expressed as a negative number in "/etc/security/pwquality.conf".</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-004066CCI-001619Configure RHEL 9 to enforce password complexity by requiring at least one special character be used by setting the "ocredit" option. -Add the following line to "/etc/security/pwquality.conf" (or modify the line to have the required value): +Add or update the following line in the "/etc/security/pwquality.conf" file or a configuration file in the "/etc/security/pwquality.conf.d/" directory to contain the "ocredit" parameter: -ocredit = -1Verify that RHEL 9 enforces password complexity by requiring at least one special character with the following command: +ocredit = -1Verify that RHEL 9 enforces password complexity by requiring at least one special character with the following command: $ sudo grep ocredit /etc/security/pwquality.conf /etc/security/pwquality.conf.d/*.conf ocredit = -1 -If the value of "ocredit" is a positive number or is commented out, this is a finding.SRG-OS-000480-GPOS-00225<GroupDescription></GroupDescription>RHEL-09-611105RHEL 9 must prevent the use of dictionary words for passwords.<VulnDiscussion>Use of a complex password helps to increase the time and resources required to compromise the password. Password complexity, or strength, is a measure of the effectiveness of a password in resisting attempts at guessing and brute-force attacks. If RHEL 9 allows the user to select passwords based on dictionary words, this increases the chances of password compromise by increasing the opportunity for successful guesses, and brute-force attacks.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000366Configure RHEL 9 to prevent the use of dictionary words for passwords. +If the value of "ocredit" is a positive number or is commented out, this is a finding.SRG-OS-000480-GPOS-00225<GroupDescription></GroupDescription>RHEL-09-611105RHEL 9 must prevent the use of dictionary words for passwords.<VulnDiscussion>Use of a complex password helps to increase the time and resources required to compromise the password. Password complexity, or strength, is a measure of the effectiveness of a password in resisting attempts at guessing and brute-force attacks. If RHEL 9 allows the user to select passwords based on dictionary words, this increases the chances of password compromise by increasing the opportunity for successful guesses, and brute-force attacks.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000366Configure RHEL 9 to prevent the use of dictionary words for passwords. -Add or update the following line in the "/etc/security/pwquality.conf" file or a configuration file in the /etc/pwquality.conf.d/ directory to contain the "dictcheck" parameter: +Add or update the following line in the "/etc/security/pwquality.conf" file or a configuration file in the "/etc/security/pwquality.conf.d/" directory to contain the "dictcheck" parameter: -dictcheck=1Verify RHEL 9 prevents the use of dictionary words for passwords with the following command: +dictcheck=1Verify RHEL 9 prevents the use of dictionary words for passwords with the following command: -$ sudo grep dictcheck /etc/security/pwquality.conf /etc/pwquality.conf.d/*.conf +$ grep dictcheck /etc/security/pwquality.conf /etc/security/pwquality.conf.d/*.conf -/etc/security/pwquality.conf:dictcheck=1 +/etc/security/pwquality.conf:dictcheck = 1 -If "dictcheck" does not have a value other than "0", or is commented out, this is a finding.SRG-OS-000069-GPOS-00037<GroupDescription></GroupDescription>RHEL-09-611110RHEL 9 must enforce password complexity by requiring that at least one uppercase character be used.<VulnDiscussion>Use of a complex password helps to increase the time and resources required to compromise the password. Password complexity, or strength, is a measure of the effectiveness of a password in resisting attempts at guessing and brute-force attacks. Password complexity is one factor of several that determines how long it takes to crack a password. The more complex the password, the greater the number of possible combinations that need to be tested before the password is compromised. Requiring a minimum number of uppercase characters makes password guessing attacks more difficult by ensuring a larger search space.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-004066CCI-000192Configure RHEL 9 to enforce password complexity by requiring that at least one uppercase character be used by setting the "ucredit" option. +If "dictcheck" does not have a value other than "0", or is commented out, this is a finding.SRG-OS-000069-GPOS-00037<GroupDescription></GroupDescription>RHEL-09-611110RHEL 9 must enforce password complexity by requiring that at least one uppercase character be used.<VulnDiscussion>Use of a complex password helps to increase the time and resources required to compromise the password. Password complexity, or strength, is a measure of the effectiveness of a password in resisting attempts at guessing and brute-force attacks. Password complexity is one factor of several that determines how long it takes to crack a password. The more complex the password, the greater the number of possible combinations that need to be tested before the password is compromised. Requiring a minimum number of uppercase characters makes password guessing attacks more difficult by ensuring a larger search space.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-004066CCI-000192Configure RHEL 9 to enforce password complexity by requiring that at least one uppercase character be used by setting the "ucredit" option. -Add the following line to /etc/security/pwquality.conf (or modify the line to have the required value): +Add or update the following line in the "/etc/security/pwquality.conf" file or a configuration file in the "/etc/security/pwquality.conf.d/" directory to contain the "ucredit" parameter: -ucredit = -1Verify that RHEL 9 enforces password complexity by requiring that at least one uppercase character. +ucredit = -1Verify that RHEL 9 enforces password complexity by requiring that at least one uppercase character be used. Check the value for "ucredit" with the following command: -$ sudo grep ucredit /etc/security/pwquality.conf /etc/security/pwquality.conf/*.conf +$ grep ucredit /etc/security/pwquality.conf /etc/security/pwquality.conf.d/*.conf ucredit = -1 -If the value of "ucredit" is a positive number or is commented out, this is a finding.SRG-OS-000072-GPOS-00040<GroupDescription></GroupDescription>RHEL-09-611115RHEL 9 must require the change of at least eight characters when passwords are changed.<VulnDiscussion>Use of a complex password helps to increase the time and resources required to compromise the password. Password complexity, or strength, is a measure of the effectiveness of a password in resisting attempts at guessing and brute-force attacks. +If the value of "ucredit" is a positive number or is commented out, this is a finding.SRG-OS-000072-GPOS-00040<GroupDescription></GroupDescription>RHEL-09-611115RHEL 9 must require the change of at least eight characters when passwords are changed.<VulnDiscussion>Use of a complex password helps to increase the time and resources required to compromise the password. Password complexity, or strength, is a measure of the effectiveness of a password in resisting attempts at guessing and brute-force attacks. -Password complexity is one factor of several that determines how long it takes to crack a password. The more complex the password, the greater the number of possible combinations that need to be tested before the password is compromised. Requiring a minimum number of different characters during password changes ensures that newly changed passwords will not resemble previously compromised ones. Note that passwords changed on compromised systems will still be compromised.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-004066CCI-000195Configure RHEL 9 to require the change of at least eight of the total number of characters when passwords are changed by setting the "difok" option. +Password complexity is one factor of several that determines how long it takes to crack a password. The more complex the password, the greater the number of possible combinations that need to be tested before the password is compromised. Requiring a minimum number of different characters during password changes ensures that newly changed passwords will not resemble previously compromised ones. Note that passwords changed on compromised systems will still be compromised.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-004066CCI-000195Configure RHEL 9 to require the change of at least eight of the total number of characters when passwords are changed by setting the "difok" option. -Add the following line to "/etc/security/pwquality.conf" (or modify the line to have the required value): +Add or update the following line in the "/etc/security/pwquality.conf" file or a configuration file in the "/etc/security/pwquality.conf.d/" directory to contain the "difok" parameter: -difok = 8Verify the value of the "difok" option in "/etc/security/pwquality.conf" with the following command: +difok = 8Verify that RHEL 9 requires the change of at least eight of the total number of characters when passwords are changed. -$ sudo grep difok /etc/security/pwquality.conf +$ grep difok /etc/security/pwquality.conf /etc/security/pwquality.conf.d/*.conf difok = 8 -If the value of "difok" is set to less than "8", or is commented out, this is a finding.SRG-OS-000072-GPOS-00040<GroupDescription></GroupDescription>RHEL-09-611120RHEL 9 must require the maximum number of repeating characters of the same character class be limited to four when passwords are changed.<VulnDiscussion>Use of a complex password helps to increase the time and resources required to compromise the password. Password complexity, or strength, is a measure of the effectiveness of a password in resisting attempts at guessing and brute-force attacks. +If the value of "difok" is set to less than "8", or is commented out, this is a finding.SRG-OS-000072-GPOS-00040<GroupDescription></GroupDescription>RHEL-09-611120RHEL 9 must require the maximum number of repeating characters of the same character class be limited to four when passwords are changed.<VulnDiscussion>Use of a complex password helps to increase the time and resources required to compromise the password. Password complexity, or strength, is a measure of the effectiveness of a password in resisting attempts at guessing and brute-force attacks. -Password complexity is one factor of several that determines how long it takes to crack a password. The more complex a password, the greater the number of possible combinations that need to be tested before the password is compromised.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-004066CCI-000195Configure RHEL 9 to require the change of the number of repeating characters of the same character class when passwords are changed by setting the "maxclassrepeat" option. +Password complexity is one factor of several that determines how long it takes to crack a password. The more complex a password, the greater the number of possible combinations that need to be tested before the password is compromised.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-004066CCI-000195Configure RHEL 9 to require the change of the number of repeating characters of the same character class when passwords are changed by setting the "maxclassrepeat" option. -Add the following line to "/etc/security/pwquality.conf" conf (or modify the line to have the required value): +Add or update the following line in the "/etc/security/pwquality.conf" file or a configuration file in the "/etc/security/pwquality.conf.d/" directory to contain the "maxclassrepeat" parameter: -maxclassrepeat = 4Verify the value of the "maxclassrepeat" option in "/etc/security/pwquality.conf" with the following command: +maxclassrepeat = 4Verify that RHEL 9 requires that passwords can have a maximum of four repeating characters of the same character class. -$ grep maxclassrepeat /etc/security/pwquality.conf +$ grep maxclassrepeat /etc/security/pwquality.conf /etc/security/pwquality.conf.d/*.conf maxclassrepeat = 4 -If the value of "maxclassrepeat" is set to "0", more than "4", or is commented out, this is a finding.SRG-OS-000072-GPOS-00040<GroupDescription></GroupDescription>RHEL-09-611125RHEL 9 must require the maximum number of repeating characters be limited to three when passwords are changed.<VulnDiscussion>Use of a complex password helps to increase the time and resources required to compromise the password. Password complexity, or strength, is a measure of the effectiveness of a password in resisting attempts at guessing and brute-force attacks. +If the value of "maxclassrepeat" is set to "0", more than "4", or is commented out, this is a finding.SRG-OS-000072-GPOS-00040<GroupDescription></GroupDescription>RHEL-09-611125RHEL 9 must require the maximum number of repeating characters be limited to three when passwords are changed.<VulnDiscussion>Use of a complex password helps to increase the time and resources required to compromise the password. Password complexity, or strength, is a measure of the effectiveness of a password in resisting attempts at guessing and brute-force attacks. -Password complexity is one factor of several that determines how long it takes to crack a password. The more complex a password, the greater the number of possible combinations that need to be tested before the password is compromised.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-004066CCI-000195Configure RHEL 9 to require the change of the number of repeating consecutive characters when passwords are changed by setting the "maxrepeat" option. +Password complexity is one factor of several that determines how long it takes to crack a password. The more complex a password, the greater the number of possible combinations that need to be tested before the password is compromised.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-004066CCI-000195Configure RHEL 9 to require the change of the number of repeating consecutive characters when passwords are changed by setting the "maxrepeat" option. -Add the following line to "/etc/security/pwquality.conf" (or modify the line to have the required value): +Add or update the following line in the "/etc/security/pwquality.conf" file or a configuration file in the "/etc/security/pwquality.conf.d/" directory to contain the "maxrepeat" parameter: -maxrepeat = 3Verify the value of the "maxrepeat" option in "/etc/security/pwquality.conf" with the following command: +maxrepeat = 3Verify that RHEL 9 requires that passwords can have a maximum of three of the same consecutive character. -$ grep maxrepeat /etc/security/pwquality.conf +$ grep maxrepeat /etc/security/pwquality.conf /etc/security/pwquality.conf.d/*.conf maxrepeat = 3 -If the value of "maxrepeat" is set to more than "3", or is commented out, this is a finding.SRG-OS-000072-GPOS-00040<GroupDescription></GroupDescription>RHEL-09-611130RHEL 9 must require the change of at least four character classes when passwords are changed.<VulnDiscussion>Use of a complex password helps to increase the time and resources required to compromise the password. Password complexity, or strength, is a measure of the effectiveness of a password in resisting attempts at guessing and brute-force attacks. +If the value of "maxrepeat" is set to more than "3", or is commented out, this is a finding.SRG-OS-000072-GPOS-00040<GroupDescription></GroupDescription>RHEL-09-611130RHEL 9 must require the change of at least four character classes when passwords are changed.<VulnDiscussion>Use of a complex password helps to increase the time and resources required to compromise the password. Password complexity, or strength, is a measure of the effectiveness of a password in resisting attempts at guessing and brute-force attacks. -Password complexity is one factor of several that determines how long it takes to crack a password. The more complex a password, the greater the number of possible combinations that need to be tested before the password is compromised.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-004066CCI-000195Configure RHEL 9 to require the change of at least four character classes when passwords are changed by setting the "minclass" option. +Password complexity is one factor of several that determines how long it takes to crack a password. The more complex a password, the greater the number of possible combinations that need to be tested before the password is compromised.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-004066CCI-000195Configure RHEL 9 to require the change of at least four character classes when passwords are changed by setting the "minclass" option. -Add the following line to "/etc/security/pwquality.conf" (or modify the line to have the required value): +Add or update the following line in the "/etc/security/pwquality.conf" file or a configuration file in the "/etc/security/pwquality.conf.d/" directory to contain the "minclass" parameter: -minclass = 4Verify the value of the "minclass" option in "/etc/security/pwquality.conf" with the following command: +minclass = 4Verify that RHEL 9 requires passwords to contain at least four character classes. -$ grep minclass /etc/security/pwquality.conf +$ grep minclass /etc/security/pwquality.conf /etc/security/pwquality.conf.d/*.conf minclass = 4 -If the value of "minclass" is set to less than "4", or is commented out, this is a finding.SRG-OS-000073-GPOS-00041<GroupDescription></GroupDescription>RHEL-09-611135RHEL 9 must be configured so that user and group account administration utilities are configured to store only encrypted representations of passwords.<VulnDiscussion>Passwords need to be protected at all times, and encryption is the standard method for protecting passwords. If passwords are not encrypted, they can be plainly read (i.e., clear text) and easily compromised. Passwords that are encrypted with a weak algorithm are no more protected than if they are kept in plain text. +If the value of "minclass" is set to less than "4", or is commented out, this is a finding.SRG-OS-000073-GPOS-00041<GroupDescription></GroupDescription>RHEL-09-611135RHEL 9 must be configured so that user and group account administration utilities are configured to store only encrypted representations of passwords.<VulnDiscussion>Passwords need to be protected at all times, and encryption is the standard method for protecting passwords. If passwords are not encrypted, they can be plainly read (i.e., clear text) and easily compromised. Passwords that are encrypted with a weak algorithm are no more protected than if they are kept in plain text. This setting ensures user and group account administration utilities are configured to store only encrypted representations of passwords. Additionally, the "crypt_style" configuration option ensures the use of a strong hashing algorithm that makes password cracking attacks more difficult.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-004062CCI-000196Configure RHEL 9 to use the SHA-512 algorithm for password hashing. Add or change the following line in the "[defaults]" section of "/etc/libuser.conf" file: -crypt_style = sha512Verify the user and group account administration utilities are configured to store only encrypted representations of passwords with the following command: +crypt_style = sha512Verify the user and group account administration utilities are configured to store only encrypted representations of passwords with the following command: -# grep crypt /etc/libuser.conf +$ grep crypt_style /etc/libuser.conf crypt_style = sha512 @@ -4750,7 +4793,7 @@ ENCRYPT_METHOD SHA512SRG-OS-000373-GPOS-00156<GroupDescription></GroupDescription>RHEL-09-611145RHEL 9 must not be configured to bypass password requirements for privilege escalation.<VulnDiscussion>Without reauthentication, users may access resources or perform tasks for which they do not have authorization. When operating systems provide the capability to escalate a functional capability, it is critical the user reauthenticate. +If "ENCRYPT_METHOD" does not have a value of "SHA512", or the line is commented out, this is a finding.SRG-OS-000373-GPOS-00156<GroupDescription></GroupDescription>RHEL-09-611145RHEL 9 must not be configured to bypass password requirements for privilege escalation.<VulnDiscussion>Without reauthentication, users may access resources or perform tasks for which they do not have authorization. When operating systems provide the capability to escalate a functional capability, it is critical the user reauthenticate. Satisfies: SRG-OS-000373-GPOS-00156, SRG-OS-000373-GPOS-00157, SRG-OS-000373-GPOS-00158</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-004895CCI-002038Configure the operating system to require users to supply a password for privilege escalation. @@ -4770,31 +4813,33 @@ $ sudo passwd -l [username]SRG-OS-000104-GPOS-00051<GroupDescription></GroupDescription>RHEL-09-611160RHEL 9 must use the common access card (CAC) smart card driver.<VulnDiscussion>Smart card login provides two-factor authentication stronger than that provided by a username and password combination. Smart cards leverage public key infrastructure to provide and verify credentials. Configuring the smart card driver in use by the organization helps to prevent users from using unauthorized smart cards. +If the command returns any results, this is a finding.SRG-OS-000104-GPOS-00051<GroupDescription></GroupDescription>RHEL-09-611160RHEL 9 must use the common access card (CAC) smart card driver.<VulnDiscussion>Smart card login provides two-factor authentication stronger than that provided by a username and password combination. Smart cards leverage public key infrastructure to provide and verify credentials. Configuring the smart card driver in use by the organization helps to prevent users from using unauthorized smart cards. -Satisfies: SRG-OS-000104-GPOS-00051, SRG-OS-000106-GPOS-00053, SRG-OS-000107-GPOS-00054, SRG-OS-000109-GPOS-00056, SRG-OS-000108-GPOS-00055, SRG-OS-000112-GPOS-00057, SRG-OS-000113-GPOS-00058</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000764CCI-000766CCI-000765CCI-004045CCI-001941CCI-000767CCI-000768CCI-000770CCI-001942Configure RHEL 9 to load the CAC driver. +Satisfies: SRG-OS-000104-GPOS-00051, SRG-OS-000106-GPOS-00053, SRG-OS-000107-GPOS-00054, SRG-OS-000109-GPOS-00056, SRG-OS-000108-GPOS-00055, SRG-OS-000112-GPOS-00057, SRG-OS-000113-GPOS-00058</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000764CCI-000766CCI-000765CCI-004045CCI-001941CCI-000767CCI-000768CCI-000770CCI-001942Configure RHEL 9 to load the CAC driver. -Add or modify the following line in the "/etc/opensc.conf" file: +$ sudo opensc-tool --set-conf-entry app:default:card_driver:cac -card_drivers = cac;Verify that RHEL loads the CAC driver with the following command: +Restart the pcscd service to apply the changes: -$ grep card_drivers /etc/opensc.conf +$ sudo systemctl restart pcscdVerify that RHEL loads the CAC driver with the following command: -card_drivers = cac; +$ sudo opensc-tool --get-conf-entry app:default:card_driver cac -If "cac" is not listed as a card driver, or there is no line returned for "card_drivers", this is a finding.SRG-OS-000375-GPOS-00160<GroupDescription></GroupDescription>RHEL-09-611165RHEL 9 must enable certificate based smart card authentication.<VulnDiscussion>Without the use of multifactor authentication, the ease of access to privileged functions is greatly increased. Multifactor authentication requires using two or more factors to achieve authentication. A privileged account is defined as an information system account with authorizations of a privileged user. The DOD Common Access Card (CAC) with DOD-approved PKI is an example of multifactor authentication. +cac -Satisfies: SRG-OS-000375-GPOS-00160, SRG-OS-000105-GPOS-00052</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000765CCI-004046CCI-004047CCI-001948Edit the file "/etc/sssd/sssd.conf" and add or edit the following line: +If "cac" is not listed as a card driver, or no line is returned for "card_drivers", this is a finding.SRG-OS-000375-GPOS-00160<GroupDescription></GroupDescription>RHEL-09-611165RHEL 9 must enable certificate based smart card authentication.<VulnDiscussion>Without the use of multifactor authentication, the ease of access to privileged functions is greatly increased. Multifactor authentication requires using two or more factors to achieve authentication. A privileged account is defined as an information system account with authorizations of a privileged user. The DOD Common Access Card (CAC) with DOD-approved PKI is an example of multifactor authentication. -pam_cert_auth = TrueVerify that RHEL 9 has smart cards are enabled in System Security Services Daemon (SSSD), run the following command: +Satisfies: SRG-OS-000375-GPOS-00160, SRG-OS-000105-GPOS-00052</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000765CCI-004046CCI-004047CCI-001948Edit the file "/etc/sssd/sssd.conf" or a configuration file in "/etc/sssd/conf.d" and add or edit the following line: -$ sudo grep pam_cert_auth /etc/sssd/sssd.conf +pam_cert_auth = TrueNote: If the system administrator (SA) demonstrates the use of an approved alternate multifactor authentication method, this requirement is Not Applicable. -pam_cert_auth = True +To verify that RHEL 9 has smart cards enabled in System Security Services Daemon (SSSD), run the following command: -If "pam_cert_auth" is not set to "True", the line is commented out, or the line is missing, this is a finding. +$ sudo grep -ir pam_cert_auth /etc/sssd/sssd.conf /etc/sssd/conf.d/ -Note: If the system administrator (SA) demonstrates the use of an approved alternate multifactor authentication method, this requirement is not applicable.SRG-OS-000375-GPOS-00160<GroupDescription></GroupDescription>RHEL-09-611170RHEL 9 must implement certificate status checking for multifactor authentication.<VulnDiscussion>Using an authentication device, such as a DOD common access card (CAC) or token that is separate from the information system, ensures that even if the information system is compromised, credentials stored on the authentication device will not be affected. +pam_cert_auth = True + +If "pam_cert_auth" is not set to "True", the line is commented out, or the line is missing, this is a finding.SRG-OS-000375-GPOS-00160<GroupDescription></GroupDescription>RHEL-09-611170RHEL 9 must implement certificate status checking for multifactor authentication.<VulnDiscussion>Using an authentication device, such as a DOD common access card (CAC) or token that is separate from the information system, ensures that even if the information system is compromised, credentials stored on the authentication device will not be affected. Multifactor solutions that require devices separate from information systems gaining access include, for example, hardware tokens providing time-based or challenge-response authenticators and smart cards such as the U.S. Government Personal Identity Verification (PIV) card and the DOD CAC. @@ -4815,45 +4860,47 @@ $ sudo chmod 600 "/etc/sssd/conf.d/certificate_verification.conf" The "sssd" service must be restarted for the changes to take effect. To restart the "sssd" service, run the following command: -$ sudo systemctl restart sssd.serviceVerify the operating system implements Online Certificate Status Protocol (OCSP) and is using the proper digest value on the system with the following command: +$ sudo systemctl restart sssd.serviceNote: If the system administrator (SA) demonstrates the use of an approved alternate multifactor authentication method, this requirement is Not Applicable. + +Verify the operating system implements Online Certificate Status Protocol (OCSP) and is using the proper digest value on the system with the following command: -$ sudo grep certificate_verification /etc/sssd/sssd.conf /etc/sssd/conf.d/*.conf | grep -v "^#" +$ sudo grep -ir certificate_verification /etc/sssd/sssd.conf /etc/sssd/conf.d/ | grep -v "^#" certificate_verification = ocsp_dgst=sha512 -If the certificate_verification line is missing from the [sssd] section, or is missing "ocsp_dgst=sha512", ask the administrator to indicate what type of multifactor authentication is being utilized and how the system implements certificate status checking. If there is no evidence of certificate status checking being used, this is a finding. +If the certificate_verification line is missing from the [sssd] section, or is missing "ocsp_dgst=sha512", ask the administrator to indicate what type of multifactor authentication is being used and how the system implements certificate status checking. -Note: If the system administrator (SA) demonstrates the use of an approved alternate multifactor authentication method, this requirement is not applicable.SRG-OS-000375-GPOS-00160<GroupDescription></GroupDescription>RHEL-09-611175RHEL 9 must have the pcsc-lite package installed.<VulnDiscussion>The pcsc-lite package must be installed if it is to be available for multifactor authentication using smart cards.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-004046CCI-001948The pcsc-lite package can be installed with the following command: +If there is no evidence of certificate status checking being used, this is a finding.SRG-OS-000375-GPOS-00160<GroupDescription></GroupDescription>RHEL-09-611175RHEL 9 must have the pcsc-lite package installed.<VulnDiscussion>The pcsc-lite package must be installed if it is to be available for multifactor authentication using smart cards.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-004046CCI-001948The pcsc-lite package can be installed with the following command: -$ sudo dnf install pcsc-liteVerify that RHEL 9 has the pcsc-lite package installed with the following command: +$ sudo dnf install pcsc-liteNote: If the system administrator (SA) demonstrates the use of an approved alternate multifactor authentication method, this requirement is Not Applicable. + +Verify that RHEL 9 has the pcsc-lite package installed with the following command: -$ sudo dnf list --installed pcsc-lite +$ dnf list --installed pcsc-lite Example output: pcsc-lite.x86_64 1.9.4-1.el9 -If the "pcsc-lite" package is not installed, this is a finding. +If the "pcsc-lite" package is not installed, this is a finding.SRG-OS-000375-GPOS-00160<GroupDescription></GroupDescription>RHEL-09-611180The pcscd service on RHEL 9 must be active.<VulnDiscussion>The information system ensures that even if the information system is compromised, that compromise will not affect credentials stored on the authentication device. -Note: If the system administrator (SA) demonstrates the use of an approved alternate multifactor authentication method, this requirement is not applicable.SRG-OS-000375-GPOS-00160<GroupDescription></GroupDescription>RHEL-09-611180The pcscd service on RHEL 9 must be active.<VulnDiscussion>The information system ensures that even if the information system is compromised, that compromise will not affect credentials stored on the authentication device. +The daemon program for pcsc-lite and the MuscleCard framework is pcscd. It is a resource manager that coordinates communications with smart card readers and smart cards and cryptographic tokens that are connected to the system.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-004046CCI-001948To enable the pcscd socket, run the following command: -The daemon program for pcsc-lite and the MuscleCard framework is pcscd. It is a resource manager that coordinates communications with smart card readers and smart cards and cryptographic tokens that are connected to the system.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-004046CCI-001948To enable the pcscd service run the following command: +$ sudo systemctl enable --now pcscd.socketVerify that the "pcscd" socket is active with the following command: -$ sudo systemctl enable --now pcscdVerify that the "pcscd" service is active with the following command: - -$ systemctl is-active pcscd +$ systemctl is-active pcscd.socket active -If the pcscdservice is not active, this is a finding.SRG-OS-000375-GPOS-00160<GroupDescription></GroupDescription>RHEL-09-611185RHEL 9 must have the opensc package installed.<VulnDiscussion>The use of PIV credentials facilitates standardization and reduces the risk of unauthorized access. +If the pcscd socket is not active, this is a finding.SRG-OS-000375-GPOS-00160<GroupDescription></GroupDescription>RHEL-09-611185RHEL 9 must have the opensc package installed.<VulnDiscussion>The use of PIV credentials facilitates standardization and reduces the risk of unauthorized access. The DOD has mandated the use of the common access card (CAC) to support identity management and personal authentication for systems covered under Homeland Security Presidential Directive (HSPD) 12, as well as making the CAC a primary component of layered protection for national security systems. Satisfies: SRG-OS-000375-GPOS-00160, SRG-OS-000376-GPOS-00161</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-004046CCI-001953CCI-001948The opensc package can be installed with the following command: -$ sudo dnf install openscVerify that RHEL 9 has the opensc package installed with the following command: +$ sudo dnf install openscVerify that RHEL 9 has the opensc package installed with the following command: -$ sudo dnf list --installed opensc +$ dnf list --installed opensc Example output: @@ -4897,17 +4944,21 @@ $ grep sulogin /usr/lib/systemd/system/rescue.service ExecStart=-/usr/lib/systemd/systemd-sulogin-shell rescue -If this line is not returned, or is commented out, this is a finding.SRG-OS-000120-GPOS-00061<GroupDescription></GroupDescription>RHEL-09-611205RHEL 9 must prevent system daemons from using Kerberos for authentication.<VulnDiscussion>Unapproved mechanisms used for authentication to the cryptographic module are not verified; therefore, cannot be relied upon to provide confidentiality or integrity and DOD data may be compromised. +If this line is not returned, or is commented out, this is a finding.SRG-OS-000120-GPOS-00061<GroupDescription></GroupDescription>RHEL-09-611205RHEL 9 must prevent system daemons from using Kerberos for authentication.<VulnDiscussion>Unapproved mechanisms used for authentication to the cryptographic module are not verified; therefore, cannot be relied upon to provide confidentiality or integrity and DOD data may be compromised. RHEL 9 systems utilizing encryption are required to use FIPS-compliant mechanisms for authenticating to cryptographic modules. The key derivation function (KDF) in Kerberos is not FIPS compatible. Ensuring the system does not have any keytab files present prevents system daemons from using Kerberos for authentication. A keytab is a file containing pairs of Kerberos principals and encrypted keys. -FIPS 140-3 is the current standard for validating that mechanisms used to access cryptographic modules utilize authentication that meets DOD requirements. This allows for Security Levels 1, 2, 3, or 4 for use on a general-purpose computing system.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000803Configure RHEL 9 to prevent system daemons from using Kerberos for authentication. +FIPS 140-3 is the current standard for validating that mechanisms used to access cryptographic modules utilize authentication that meets DOD requirements. This allows for Security Levels 1, 2, 3, or 4 for use on a general-purpose computing system.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000803Configure RHEL 9 to prevent system daemons from using Kerberos for authentication. Remove any files with the .keytab extension from the operating system. -rm -f /etc/*.keytabVerify that RHEL 9 prevents system daemons from using Kerberos for authentication with the following command: +rm -f /etc/*.keytab + +If Kerberos authentication is a mission requirement, document its use and justification with the ISSO.Note: If there is an operational requirement for Kerberos implementation, and it is documented with the ISSO, this control is Not Applicable. + +Verify that RHEL 9 prevents system daemons from using Kerberos for authentication with the following command: $ sudo ls -al /etc/*.keytab @@ -4945,7 +4996,7 @@ Certificate: Subject Public Key Info: Public Key Algorithm: rsaEncryption -If the root CA file is not a DOD-issued certificate with a valid date and installed in the "/etc/sssd/pki/sssd_auth_ca_db.pem" location, this is a finding.SRG-OS-000068-GPOS-00036<GroupDescription></GroupDescription>RHEL-09-631015RHEL 9 must map the authenticated identity to the user or group account for PKI-based authentication.<VulnDiscussion>Without mapping the certificate used to authenticate to the user account, the ability to determine the identity of the individual user or group will not be available for forensic analysis.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000187Configure RHEL 9 to map the authenticated identity to the user or group account by adding or modifying the certmap section of the "/etc/sssd/sssd.conf" file based on the following example: +If the root CA file is not a DOD-issued certificate with a valid date and installed in the "/etc/sssd/pki/sssd_auth_ca_db.pem" location, this is a finding.SRG-OS-000068-GPOS-00036<GroupDescription></GroupDescription>RHEL-09-631015RHEL 9 must map the authenticated identity to the user or group account for PKI-based authentication.<VulnDiscussion>Without mapping the certificate used to authenticate to the user account, the ability to determine the identity of the individual user or group will not be available for forensic analysis.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000187Configure RHEL 9 to map the authenticated identity to the user or group account by adding or modifying the certmap section of the "/etc/sssd/sssd.conf" file based on the following example: [certmap/testing.test/rule_name] matchrule = .*EDIPI@mil @@ -4954,26 +5005,28 @@ domains = testing.test The "sssd" service must be restarted for the changes to take effect. To restart the "sssd" service, run the following command: -$ sudo systemctl restart sssd.serviceVerify the certificate of the user or group is mapped to the corresponding user or group in the "sssd.conf" file with the following command: +$ sudo systemctl restart sssd.serviceVerify the certificate of the user or group is mapped to the corresponding user or group in the "sssd.conf" file with the following command: -$ sudo cat /etc/sssd/sssd.conf +$ sudo find /etc/sssd/sssd.conf /etc/sssd/conf.d/ -type f -exec cat {} \; [certmap/testing.test/rule_name] matchrule =<SAN>.*EDIPI@mil maprule = (userCertificate;binary={cert!bin}) domains = testing.test -If the certmap section does not exist, ask the system administrator (SA) to indicate how certificates are mapped to accounts. If there is no evidence of certificate mapping, this is a finding.SRG-OS-000383-GPOS-00166<GroupDescription></GroupDescription>RHEL-09-631020RHEL 9 must prohibit the use of cached authenticators after one day.<VulnDiscussion>If cached authentication information is out-of-date, the validity of the authentication information may be questionable.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-002007Configure the SSSD to prohibit the use of cached authentications after one day. +If the certmap section does not exist, ask the system administrator (SA) to indicate how certificates are mapped to accounts. + +If there is no evidence of certificate mapping, this is a finding.SRG-OS-000383-GPOS-00166<GroupDescription></GroupDescription>RHEL-09-631020RHEL 9 must prohibit the use of cached authenticators after one day.<VulnDiscussion>If cached authentication information is out-of-date, the validity of the authentication information may be questionable.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-002007Configure the SSSD to prohibit the use of cached authentications after one day. -Add or change the following line in "/etc/sssd/sssd.conf" just below the line [pam]: +Edit the file "/etc/sssd/sssd.conf" or a configuration file in "/etc/sssd/conf.d" and add or edit the following line just below the line [pam]: -offline_credentials_expiration = 1Verify that the System Security Services Daemon (SSSD) prohibits the use of cached authentications after one day. +offline_credentials_expiration = 1Verify that the System Security Services Daemon (SSSD) prohibits the use of cached authentications after one day. -Note: If smart card authentication is not being used on the system, this requirement is Not Applicable. +Note: Cached authentication settings should be configured even if smart card authentication is not used on the system. Check that SSSD allows cached authentications with the following command: -$ sudo grep cache_credentials /etc/sssd/sssd.conf +$ sudo grep -ir cache_credentials /etc/sssd/sssd.conf /etc/sssd/conf.d/ cache_credentials = true @@ -4981,11 +5034,11 @@ If "cache_credentials" is set to "false" or missing from the configuration file, If "cache_credentials" is set to "true", check that SSSD prohibits the use of cached authentications after one day with the following command: -$ sudo grep offline_credentials_expiration /etc/sssd/sssd.conf +$ sudo grep -ir offline_credentials_expiration /etc/sssd/sssd.conf /etc/sssd/conf.d/ offline_credentials_expiration = 1 -If "offline_credentials_expiration" is not set to a value of "1", this is a finding.SRG-OS-000363-GPOS-00150<GroupDescription></GroupDescription>RHEL-09-651010RHEL 9 must have the AIDE package installed.<VulnDiscussion>Without verification of the security functions, security functions may not operate correctly, and the failure may go unnoticed. Security function is defined as the hardware, software, and/or firmware of the information system responsible for enforcing the system security policy and supporting the isolation of code and data on which the protection is based. Security functionality includes, but is not limited to, establishing system accounts, configuring access authorizations (i.e., permissions, privileges), setting events to be audited, and setting intrusion detection parameters. +If "offline_credentials_expiration" is not set to a value of "1", this is a finding.SRG-OS-000363-GPOS-00150<GroupDescription></GroupDescription>RHEL-09-651010RHEL 9 must have the AIDE package installed.<VulnDiscussion>Without verification of the security functions, security functions may not operate correctly, and the failure may go unnoticed. Security function is defined as the hardware, software, and/or firmware of the information system responsible for enforcing the system security policy and supporting the isolation of code and data on which the protection is based. Security functionality includes, but is not limited to, establishing system accounts, configuring access authorizations (i.e., permissions, privileges), setting events to be audited, and setting intrusion detection parameters. Satisfies: SRG-OS-000363-GPOS-00150, SRG-OS-000445-GPOS-00199</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-001744CCI-002696Install AIDE, initialize it, and perform a manual check. @@ -5032,9 +5085,9 @@ Example output: 2023-06-05 10:16:08 -0600 (AIDE 0.16) AIDE found NO differences between database and filesystem. Looks okay!! -...Verify that RHEL 9 has the Advanced Intrusion Detection Environment (AIDE) package installed with the following command: +...Verify that RHEL 9 has the Advanced Intrusion Detection Environment (AIDE) package installed with the following command: -$ sudo dnf list --installed aide +$ dnf list --installed aide Example output: @@ -5048,7 +5101,7 @@ If AIDE is installed, check if it has been initialized with the following comman $ sudo /usr/sbin/aide --check -If the output is "Couldn't open file /var/lib/aide/aide.db.gz for reading", this is a finding.SRG-OS-000363-GPOS-00150<GroupDescription></GroupDescription>RHEL-09-651015RHEL 9 must routinely check the baseline configuration for unauthorized changes and notify the system administrator when anomalies in the operation of any security functions are discovered.<VulnDiscussion>Unauthorized changes to the baseline configuration could make the system vulnerable to various attacks or allow unauthorized access to the operating system. Changes to operating system configurations can have unintended side effects, some of which may be relevant to security. +If the output is "Couldn't open file /var/lib/aide/aide.db.gz for reading", this is a finding.SRG-OS-000363-GPOS-00150<GroupDescription></GroupDescription>RHEL-09-651015RHEL 9 must routinely check the baseline configuration for unauthorized changes and notify the system administrator when anomalies in the operation of any security functions are discovered.<VulnDiscussion>Unauthorized changes to the baseline configuration could make the system vulnerable to various attacks or allow unauthorized access to the operating system. Changes to operating system configurations can have unintended side effects, some of which may be relevant to security. Detecting such changes and providing an automated response can help avoid unintended, negative consequences that could ultimately affect the security state of the operating system. The operating system's information management officer (IMO)/information system security officer (ISSO) and system administrators (SAs) must be notified via email and/or monitoring system trap when there is an unauthorized modification of a configuration item. @@ -5063,15 +5116,15 @@ The following example output is generic. It will set cron to run AIDE daily and $ sudo more /etc/cron.daily/aide #!/bin/bash -/usr/sbin/aide --check | /bin/mail -s "$HOSTNAME - Daily aide integrity check run" root@sysname.milVerify that RHEL 9 routinely executes a file integrity scan for changes to the system baseline. The command used in the example will use a daily occurrence. +/usr/sbin/aide --check | /bin/mail -s "$HOSTNAME - Daily aide integrity check run" root@sysname.milVerify that RHEL 9 routinely executes a file integrity scan for changes to the system baseline. The command used in the example will use a daily occurrence. Check the cron directories for scripts controlling the execution and notification of results of the file integrity application. For example, if AIDE is installed on the system, use the following commands: -$ ls -al /etc/cron.* | grep aide +$ sudo ls -al /etc/cron.* | grep aide -rwxr-xr-x 1 root root 29 Nov 22 2015 aide -$ grep aide /etc/crontab /var/spool/cron/root +$ sudo grep aide /etc/crontab /var/spool/cron/root /etc/crontab: 30 04 * * * root usr/sbin/aide /var/spool/cron/root: 30 04 * * * root usr/sbin/aide @@ -5081,17 +5134,17 @@ $ sudo more /etc/cron.daily/aide #!/bin/bash /usr/sbin/aide --check | /bin/mail -s "$HOSTNAME - Daily aide integrity check run" root@sysname.mil -If the file integrity application does not exist, or a script file controlling the execution of the file integrity application does not exist, or the file integrity application does not notify designated personnel of changes, this is a finding.SRG-OS-000480-GPOS-00227<GroupDescription></GroupDescription>RHEL-09-651020RHEL 9 must use a file integrity tool that is configured to use FIPS 140-3-approved cryptographic hashes for validating file contents and directories.<VulnDiscussion>RHEL 9 installation media ships with an optional file integrity tool called Advanced Intrusion Detection Environment (AIDE). AIDE is highly configurable at install time. This requirement assumes the "aide.conf" file is under the "/etc" directory. +If the file integrity application does not exist, a script file controlling the execution of the file integrity application does not exist, or the file integrity application does not notify designated personnel of changes, this is a finding.SRG-OS-000480-GPOS-00227<GroupDescription></GroupDescription>RHEL-09-651020RHEL 9 must use a file integrity tool that is configured to use FIPS 140-3-approved cryptographic hashes for validating file contents and directories.<VulnDiscussion>RHEL 9 installation media ships with an optional file integrity tool called Advanced Intrusion Detection Environment (AIDE). AIDE is highly configurable at install time. This requirement assumes the "aide.conf" file is under the "/etc" directory. -File integrity tools use cryptographic hashes for verifying file contents and directories have not been altered. These hashes must be FIPS 140-2/140-3-approved cryptographic hashes.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000366Configure the file integrity tool to use FIPS 140-2/140-3 cryptographic hashes for validating file and directory contents. +File integrity tools use cryptographic hashes for verifying file contents and directories have not been altered. These hashes must be FIPS 140-3-approved cryptographic hashes.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000366Configure the file integrity tool to use FIPS 140-3 cryptographic hashes for validating file and directory contents. -If AIDE is installed, ensure the "sha512" rule is present on all uncommented file and directory selection lists. Exclude any log files, or files expected to change frequently, to reduce unnecessary notifications.Verify that AIDE is configured to use FIPS 140-2/140-3 file hashing with the following command: +If AIDE is installed, ensure the "sha512" rule is present on all uncommented file and directory selection lists. Exclude any log files, or files expected to change frequently, to reduce unnecessary notifications.Verify that AIDE is configured to use FIPS 140-3 file hashing with the following command: -$ grep sha512 /etc/aide.conf +$ sudo grep sha512 /etc/aide.conf All=p+i+n+u+g+s+m+S+sha512+acl+xattrs+selinux -If the "sha512" rule is not being used on all uncommented selection lines in the "/etc/aide.conf" file, or another file integrity tool is not using FIPS 140-2/140-3-approved cryptographic hashes for validating file contents and directories, this is a finding.SRG-OS-000256-GPOS-00097<GroupDescription></GroupDescription>RHEL-09-651025RHEL 9 must use cryptographic mechanisms to protect the integrity of audit tools.<VulnDiscussion>Protecting the integrity of the tools used for auditing purposes is a critical step toward ensuring the integrity of audit information. Audit information includes all information (e.g., audit records, audit settings, and audit reports) needed to successfully audit information system activity. +If the "sha512" rule is not being used on all uncommented selection lines in the "/etc/aide.conf" file, or another file integrity tool is not using FIPS 140-3-approved cryptographic hashes for validating file contents and directories, this is a finding.SRG-OS-000256-GPOS-00097<GroupDescription></GroupDescription>RHEL-09-651025RHEL 9 must use cryptographic mechanisms to protect the integrity of audit tools.<VulnDiscussion>Protecting the integrity of the tools used for auditing purposes is a critical step toward ensuring the integrity of audit information. Audit information includes all information (e.g., audit records, audit settings, and audit reports) needed to successfully audit information system activity. Audit tools include, but are not limited to, vendor-provided and open-source audit tools needed to successfully view and manipulate audit information system activity and records. Audit tools include custom queries and report generators. @@ -5106,9 +5159,9 @@ Satisfies: SRG-OS-000256-GPOS-00097, SRG-OS-000257-GPOS-00098, SRG-OS-000258-GPO /usr/sbin/ausearch p+i+n+u+g+s+b+acl+xattrs+sha512 /usr/sbin/aureport p+i+n+u+g+s+b+acl+xattrs+sha512 /usr/sbin/autrace p+i+n+u+g+s+b+acl+xattrs+sha512 -/usr/sbin/augenrules p+i+n+u+g+s+b+acl+xattrs+sha512Check that AIDE is properly configured to protect the integrity of the audit tools with the following command: +/usr/sbin/augenrules p+i+n+u+g+s+b+acl+xattrs+sha512Check that AIDE is properly configured to protect the integrity of the audit tools with the following command: -$ sudo cat /etc/aide.conf | grep /usr/sbin/au +$ sudo grep /usr/bin/au /etc/aide.conf /usr/sbin/auditctl p+i+n+u+g+s+b+acl+xattrs+sha512 /usr/sbin/auditd p+i+n+u+g+s+b+acl+xattrs+sha512 @@ -5116,48 +5169,50 @@ $ sudo cat /etc/aide.conf | grep /usr/sbin/au /usr/sbin/aureport p+i+n+u+g+s+b+acl+xattrs+sha512 /usr/sbin/autrace p+i+n+u+g+s+b+acl+xattrs+sha512 /usr/sbin/augenrules p+i+n+u+g+s+b+acl+xattrs+sha512 - + If AIDE is not installed, ask the system administrator (SA) how file integrity checks are performed on the system. -If any of the audit tools listed above do not have a corresponding line, ask the SA to indicate what cryptographic mechanisms are being used to protect the integrity of the audit tools. If there is no evidence of integrity protection, this is a finding.SRG-OS-000480-GPOS-00227<GroupDescription></GroupDescription>RHEL-09-651030RHEL 9 must be configured so that the file integrity tool verifies Access Control Lists (ACLs).<VulnDiscussion>RHEL 9 installation media ships with an optional file integrity tool called Advanced Intrusion Detection Environment (AIDE). AIDE is highly configurable at install time. This requirement assumes the "aide.conf" file is under the "/etc" directory. +If any of the audit tools listed above do not have a corresponding line, ask the SA to indicate what cryptographic mechanisms are being used to protect the integrity of the audit tools. + +If there is no evidence of integrity protection, this is a finding.SRG-OS-000480-GPOS-00227<GroupDescription></GroupDescription>RHEL-09-651030RHEL 9 must be configured so that the file integrity tool verifies Access Control Lists (ACLs).<VulnDiscussion>RHEL 9 installation media ships with an optional file integrity tool called Advanced Intrusion Detection Environment (AIDE). AIDE is highly configurable at install time. This requirement assumes the "aide.conf" file is under the "/etc" directory. ACLs can provide permissions beyond those permitted through the file mode and must be verified by the file integrity tools.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000366Configure the file integrity tool to check file and directory ACLs. -If AIDE is installed, ensure the "acl" rule is present on all uncommented file and directory selection lists.Verify that that AIDE is verifying ACLs with the following command: +If AIDE is installed, ensure the "acl" rule is present on all uncommented file and directory selection lists.Verify that AIDE is verifying ACLs with the following command: -$ grep acl /etc/aide.conf +$ sudo grep acl /etc/aide.conf All= p+i+n+u+g+s+m+S+sha512+acl+xattrs+selinux -If the "acl" rule is not being used on all uncommented selection lines in the "/etc/aide.conf" file, or ACLs are not being checked by another file integrity tool, this is a finding.SRG-OS-000480-GPOS-00227<GroupDescription></GroupDescription>RHEL-09-651035RHEL 9 must be configured so that the file integrity tool verifies extended attributes.<VulnDiscussion>RHEL 9 installation media ships with an optional file integrity tool called Advanced Intrusion Detection Environment (AIDE). AIDE is highly configurable at install time. This requirement assumes the "aide.conf" file is under the "/etc" directory. +If the "acl" rule is not being used on all uncommented selection lines in the "/etc/aide.conf" file, or ACLs are not being checked by another file integrity tool, this is a finding.SRG-OS-000480-GPOS-00227<GroupDescription></GroupDescription>RHEL-09-651035RHEL 9 must be configured so that the file integrity tool verifies extended attributes.<VulnDiscussion>RHEL 9 installation media ships with an optional file integrity tool called Advanced Intrusion Detection Environment (AIDE). AIDE is highly configurable at install time. This requirement assumes the "aide.conf" file is under the "/etc" directory. Extended attributes in file systems are used to contain arbitrary data and file metadata with security implications.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000366Configure the file integrity tool to check file and directory extended attributes. -If AIDE is installed, ensure the "xattrs" rule is present on all uncommented file and directory selection lists.Verify that AIDE is configured to verify extended attributes with the following command: +If AIDE is installed, ensure the "xattrs" rule is present on all uncommented file and directory selection lists.Verify that AIDE is configured to verify extended attributes with the following command: -$ grep xattrs /etc/aide.conf +$ sudo grep xattrs /etc/aide.conf All= p+i+n+u+g+s+m+S+sha512+acl+xattrs+selinux -If the "xattrs" rule is not being used on all uncommented selection lines in the "/etc/aide.conf" file, or extended attributes are not being checked by another file integrity tool, this is a finding.SRG-OS-000479-GPOS-00224<GroupDescription></GroupDescription>RHEL-09-652010RHEL 9 must have the rsyslog package installed.<VulnDiscussion>rsyslogd is a system utility providing support for message logging. Support for both internet and Unix domain sockets enables this utility to support both local and remote logging. Couple this utility with "gnutls" (which is a secure communications library implementing the SSL, TLS, and DTLS protocols), to create a method to securely encrypt and offload auditing. +If the "xattrs" rule is not being used on all uncommented selection lines in the "/etc/aide.conf" file, or extended attributes are not being checked by another file integrity tool, this is a finding.SRG-OS-000479-GPOS-00224<GroupDescription></GroupDescription>RHEL-09-652010RHEL 9 must have the rsyslog package installed.<VulnDiscussion>rsyslogd is a system utility providing support for message logging. Support for both internet and Unix domain sockets enables this utility to support both local and remote logging. Couple this utility with "gnutls" (which is a secure communications library implementing the SSL, TLS, and DTLS protocols), to create a method to securely encrypt and offload auditing. -Satisfies: SRG-OS-000479-GPOS-00224, SRG-OS-000051-GPOS-00024, SRG-OS-000480-GPOS-00227</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000154CCI-000366CCI-001851The rsyslogd package can be installed with the following command: +Satisfies: SRG-OS-000479-GPOS-00224, SRG-OS-000051-GPOS-00024, SRG-OS-000480-GPOS-00227</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000154CCI-001851The rsyslogd package can be installed with the following command: -$ sudo dnf install rsyslogdVerify that RHEL 9 has the rsyslogd package installed with the following command: +$ sudo dnf install rsyslogdVerify that RHEL 9 has the rsyslogd package installed with the following command: -$ sudo dnf list --installed rsyslog +$ dnf list --installed rsyslog Example output: rsyslog.x86_64 8.2102.0-101.el9_0.1 -If the "rsyslogd" package is not installed, this is a finding.SRG-OS-000480-GPOS-00227<GroupDescription></GroupDescription>RHEL-09-652015RHEL 9 must have the packages required for encrypting offloaded audit logs installed.<VulnDiscussion>The rsyslog-gnutls package provides Transport Layer Security (TLS) support for the rsyslog daemon, which enables secure remote logging. +If the "rsyslogd" package is not installed, this is a finding.SRG-OS-000480-GPOS-00227<GroupDescription></GroupDescription>RHEL-09-652015RHEL 9 must have the packages required for encrypting offloaded audit logs installed.<VulnDiscussion>The rsyslog-gnutls package provides Transport Layer Security (TLS) support for the rsyslog daemon, which enables secure remote logging. -Satisfies: SRG-OS-000480-GPOS-00227, SRG-OS-000120-GPOS-00061</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000366CCI-000803The rsyslog-gnutls package can be installed with the following command: +Satisfies: SRG-OS-000480-GPOS-00227, SRG-OS-000120-GPOS-00061</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000803The rsyslog-gnutls package can be installed with the following command: -$ sudo dnf install rsyslog-gnutlsVerify that RHEL 9 has the rsyslog-gnutls package installed with the following command: +$ sudo dnf install rsyslog-gnutlsVerify that RHEL 9 has the rsyslog-gnutls package installed with the following command: -$ sudo dnf list --installed rsyslog-gnutls +$ dnf list --installed rsyslog-gnutls Example output: @@ -5171,60 +5226,65 @@ $ systemctl is-active rsyslog active -If the rsyslog service is not active, this is a finding.SRG-OS-000480-GPOS-00227<GroupDescription></GroupDescription>RHEL-09-652025RHEL 9 must be configured so that the rsyslog daemon does not accept log messages from other servers unless the server is being used for log aggregation.<VulnDiscussion>Unintentionally running a rsyslog server accepting remote messages puts the system at increased risk. Malicious rsyslog messages sent to the server could exploit vulnerabilities in the server software itself, could introduce misleading information into the system's logs, or could fill the system's storage leading to a denial of service. +If the rsyslog service is not active, this is a finding.SRG-OS-000480-GPOS-00227<GroupDescription></GroupDescription>RHEL-09-652025RHEL 9 must be configured so that the rsyslog daemon does not accept log messages from other servers unless the server is being used for log aggregation.<VulnDiscussion>Unintentionally running a rsyslog server accepting remote messages puts the system at increased risk. Malicious rsyslog messages sent to the server could exploit vulnerabilities in the server software itself, could introduce misleading information into the system's logs, or could fill the system's storage leading to a denial of service. -If the system is intended to be a log aggregation server, its use must be documented with the information system security officer (ISSO).</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000366Configure RHEL 9 to not receive remote logs using rsyslog. +If the system is intended to be a log aggregation server, its use must be documented with the information system security officer (ISSO).</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000366Configure RHEL 9 to not receive remote logs using rsyslog. Remove the lines in /etc/rsyslog.conf and any files in the /etc/rsyslog.d directory that match any of the following: - -$ModLoad imtcp -$ModLoad imudp -$ModLoad imrelp -$InputTCPServerRun [0-9]* -$UDPServerRun [0-9]* -$InputRELPServerRun [0-9]* +module(load="imtcp") +module(load="imudp") +module(load="imrelp") +input(type="imudp" port="514") +input(type="imtcp" port="514") +input(type="imrelp" port="514") The rsyslog daemon must be restarted for the changes to take effect: -$ sudo systemctl restart rsyslog.serviceVerify that RHEL 9 is not configured to receive remote logs using rsyslog with the following commands: +$ sudo systemctl restart rsyslog.serviceVerify that RHEL 9 is not configured to receive remote logs using rsyslog with the following commands: $ grep -i modload /etc/rsyslog.conf /etc/rsyslog.d/* + $ModLoad imtcp $ModLoad imrelp +$ModLoad imudp + +$ grep -i 'load="imtcp"' /etc/rsyslog.conf /etc/rsyslog.d/* + +$ grep -i 'load="imrelp"' /etc/rsyslog.conf /etc/rsyslog.d/* $ grep -i serverrun /etc/rsyslog.conf /etc/rsyslog.d/* + $InputTCPServerRun 514 $InputRELPServerRun 514 +$InputUDPServerRun 514 + +$ grep -i 'port="\S*"' /etc/rsyslog.conf /etc/rsyslog.d/* -Note: An error stating no files or directories may be returned. This is not a finding. +/etc/rsyslog.conf:#input(type="imudp" port="514") +/etc/rsyslog.conf:#input(type="imtcp" port="514") +/etc/rsyslog.conf:#Target="remote_host" Port="XXX" Protocol="tcp") -If any modules are being loaded in the "/etc/rsyslog.conf" file or in the "/etc/rsyslog.d" subdirectories, ask to see the documentation for the system being used for log aggregation. If the documentation does not exist or does not specify the server as a log aggregation system, this is a finding.SRG-OS-000032-GPOS-00013<GroupDescription></GroupDescription>RHEL-09-652030All RHEL 9 remote access methods must be monitored.<VulnDiscussion>Logging remote access methods can be used to trace the decrease in the risks associated with remote user access management. It can also be used to spot cyberattacks and ensure ongoing compliance with organizational policies surrounding the use of remote access methods.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000067Add or update the following lines to the "/etc/rsyslog.conf" file: +If any uncommented lines are returned by the commands, rsyslog is configured to receive remote messages, and this is a finding. + +Note: An error about no files or directories from the above commands may be returned. This is not a finding. + +If any modules are being loaded in the "/etc/rsyslog.conf" file or in the "/etc/rsyslog.d" subdirectories, ask to see the documentation for the system being used for log aggregation. + +If the documentation does not exist or does not specify the server as a log aggregation system, this is a finding.SRG-OS-000032-GPOS-00013<GroupDescription></GroupDescription>RHEL-09-652030All RHEL 9 remote access methods must be monitored.<VulnDiscussion>Logging remote access methods can be used to trace the decrease in the risks associated with remote user access management. It can also be used to spot cyberattacks and ensure ongoing compliance with organizational policies surrounding the use of remote access methods.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000067Add or update the following lines to the "/etc/rsyslog.conf" file or a file in "/etc/rsyslog.d": auth.*;authpriv.*;daemon.* /var/log/secure The "rsyslog" service must be restarted for the changes to take effect with the following command: -$ sudo systemctl restart rsyslog.serviceVerify that RHEL 9 monitors all remote access methods. +$ sudo systemctl restart rsyslog.serviceVerify that RHEL 9 monitors all remote access methods. Check that remote access methods are being logged by running the following command: -$ grep -rE '(auth.\*|authpriv.\*|daemon.\*)' /etc/rsyslog.conf +$ grep -rE '(auth.\*|authpriv.\*|daemon.\*)' /etc/rsyslog.conf /etc/rsyslog.d/ /etc/rsyslog.conf:authpriv.* -If "auth.*", "authpriv.*" or "daemon.*" are not configured to be logged, this is a finding.SRG-OS-000342-GPOS-00133<GroupDescription></GroupDescription>RHEL-09-652035RHEL 9 must be configured to offload audit records onto a different system from the system being audited via syslog.<VulnDiscussion>The auditd service does not include the ability to send audit records to a centralized server for management directly. However, it can use a plug-in for audit event multiplexor (audispd) to pass audit records to the local syslog server. - -Satisfies: SRG-OS-000342-GPOS-00133, SRG-OS-000479-GPOS-00224</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-001851Edit the /etc/audit/plugins.d/syslog.conf file and add or update the "active" option: - -active = yes - -The audit daemon must be restarted for changes to take effect.Verify RHEL 9 is configured use the audisp-remote syslog service with the following command: - -$ sudo grep active /etc/audit/plugins.d/syslog.conf - -active = yes - -If the "active" keyword does not have a value of "yes", the line is commented out, or the line is missing, this is a finding.SRG-OS-000342-GPOS-00133<GroupDescription></GroupDescription>RHEL-09-652040RHEL 9 must authenticate the remote logging server for offloading audit logs via rsyslog.<VulnDiscussion>Information stored in one location is vulnerable to accidental or incidental deletion or alteration. +If "auth.*", "authpriv.*" or "daemon.*" are not configured to be logged, this is a finding.SRG-OS-000342-GPOS-00133<GroupDescription></GroupDescription>RHEL-09-652040RHEL 9 must authenticate the remote logging server for offloading audit logs via rsyslog.<VulnDiscussion>Information stored in one location is vulnerable to accidental or incidental deletion or alteration. Offloading is a common process in information systems with limited audit storage capacity. @@ -5238,15 +5298,17 @@ x509/name - certificate validation and subject name authentication Satisfies: SRG-OS-000342-GPOS-00133, SRG-OS-000479-GPOS-00224</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-001851Configure RHEL 9 to authenticate the remote logging server for offloading audit logs by setting the following option in "/etc/rsyslog.conf" or "/etc/rsyslog.d/[customfile].conf": -$ActionSendStreamDriverAuthMode x509/nameVerify RHEL 9 authenticates the remote logging server for offloading audit logs with the following command: +$ActionSendStreamDriverAuthMode x509/nameVerify RHEL 9 authenticates the remote logging server for offloading audit logs with the following command: + +$ grep -i 'StreamDriver[\.]*AuthMode' /etc/rsyslog.conf /etc/rsyslog.d/*.conf -$ sudo grep -i '$ActionSendStreamDriverAuthMode' /etc/rsyslog.conf /etc/rsyslog.d/*.conf +/etc/rsyslog.conf:$ActionSendStreamDriverAuthMode x509/name - /etc/rsyslog.conf:$ActionSendStreamDriverAuthMode x509/name +If the variable name "StreamDriverAuthMode" is present in an omfwd statement block, this is not a finding. However, if the "StreamDriverAuthMode" variable is in a module block, this is a finding. -If the value of the "$ActionSendStreamDriverAuthMode" option is not set to "x509/name" or the line is commented out, ask the system administrator (SA) to indicate how the audit logs are offloaded to a different system or media. +If the value of the "$ActionSendStreamDriverAuthMode or StreamDriver.AuthMode" option is not set to "x509/name" or the line is commented out, ask the system administrator (SA) to indicate how the audit logs are offloaded to a different system or media. -If there is no evidence that the transfer of the audit logs being offloaded to another system or media is encrypted, this is a finding.SRG-OS-000342-GPOS-00133<GroupDescription></GroupDescription>RHEL-09-652045RHEL 9 must encrypt the transfer of audit records offloaded onto a different system or media from the system being audited via rsyslog.<VulnDiscussion>Information stored in one location is vulnerable to accidental or incidental deletion or alteration. +If there is no evidence that the transfer of the audit logs being offloaded to another system or media is encrypted, this is a finding.SRG-OS-000342-GPOS-00133<GroupDescription></GroupDescription>RHEL-09-652045RHEL 9 must encrypt the transfer of audit records offloaded onto a different system or media from the system being audited via rsyslog.<VulnDiscussion>Information stored in one location is vulnerable to accidental or incidental deletion or alteration. Offloading is a common process in information systems with limited audit storage capacity. @@ -5260,13 +5322,15 @@ x509/name - certificate validation and subject name authentication Satisfies: SRG-OS-000342-GPOS-00133, SRG-OS-000479-GPOS-00224</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-001851Configure RHEL 9 to encrypt offloaded audit records via rsyslog by setting the following options in "/etc/rsyslog.conf" or "/etc/rsyslog.d/[customfile].conf": -$ActionSendStreamDriverMode 1Verify RHEL 9 encrypts audit records offloaded onto a different system or media from the system being audited via rsyslog with the following command: +$ActionSendStreamDriverMode 1Verify RHEL 9 encrypts audit records offloaded onto a different system or media from the system being audited via rsyslog with the following command: -$ sudo grep -i '$ActionSendStreamDriverMode' /etc/rsyslog.conf /etc/rsyslog.d/*.conf +$ grep -i 'StreamDriver[\.]*Mode' /etc/rsyslog.conf /etc/rsyslog.d/*.conf /etc/rsyslog.conf:$ActionSendStreamDriverMode 1 -If the value of the "$ActionSendStreamDriverMode" option is not set to "1" or the line is commented out, this is a finding.SRG-OS-000342-GPOS-00133<GroupDescription></GroupDescription>RHEL-09-652050RHEL 9 must encrypt via the gtls driver the transfer of audit records offloaded onto a different system or media from the system being audited via rsyslog.<VulnDiscussion>Information stored in one location is vulnerable to accidental or incidental deletion or alteration. +If the value of the "$ActionSendStreamDriverMode or StreamDriver.Mode" option is not set to "1" or the line is commented out, this is a finding. + +If the variable name "StreamDriverAuthMode" is present in an omfwd statement block, this is not a finding. However, if the "StreamDriverAuthMode" variable is in a module block, this is a finding.SRG-OS-000342-GPOS-00133<GroupDescription></GroupDescription>RHEL-09-652050RHEL 9 must encrypt via the gtls driver the transfer of audit records offloaded onto a different system or media from the system being audited via rsyslog.<VulnDiscussion>Information stored in one location is vulnerable to accidental or incidental deletion or alteration. Offloading is a common process in information systems with limited audit storage capacity. @@ -5274,13 +5338,15 @@ RHEL 9 installation media provides "rsyslogd", a system utility providing suppor Satisfies: SRG-OS-000342-GPOS-00133, SRG-OS-000479-GPOS-00224</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-001851Configure RHEL 9 to use the gtls driver to encrypt offloaded audit records by setting the following options in "/etc/rsyslog.conf" or "/etc/rsyslog.d/[customfile].conf": -$DefaultNetstreamDriver gtlsVerify RHEL 9 uses the gtls driver to encrypt audit records offloaded onto a different system or media from the system being audited with the following command: +$DefaultNetstreamDriver gtlsVerify RHEL 9 uses the gtls driver to encrypt audit records offloaded onto a different system or media from the system being audited with the following command: + +$ grep -Ei 'DefaultNetStreamDriver\b|StreamDriver.Name' /etc/rsyslog.conf /etc/rsyslog.d/*.conf -$ sudo grep -i '$DefaultNetstreamDriver' /etc/rsyslog.conf /etc/rsyslog.d/*.conf +/etc/rsyslog.conf:$DefaultNetstreamDriver gtls -/etc/rsyslog.conf:$DefaultNetstreamDriver gtls +If the value of the "$DefaultNetstreamDriver or StreamDriver" option is not set to "gtls" or the line is commented out, this is a finding. -If the value of the "$DefaultNetstreamDriver" option is not set to "gtls" or the line is commented out, this is a finding.SRG-OS-000479-GPOS-00224<GroupDescription></GroupDescription>RHEL-09-652055RHEL 9 must be configured to forward audit records via TCP to a different system or media from the system being audited via rsyslog.<VulnDiscussion>Information stored in one location is vulnerable to accidental or incidental deletion or alteration. +If the variable name "StreamDriver" is present in an omfwd statement block, this is not a finding. However, if the "StreamDriver" variable is in a module block, this is a finding.SRG-OS-000479-GPOS-00224<GroupDescription></GroupDescription>RHEL-09-652055RHEL 9 must be configured to forward audit records via TCP to a different system or media from the system being audited via rsyslog.<VulnDiscussion>Information stored in one location is vulnerable to accidental or incidental deletion or alteration. Offloading is a common process in information systems with limited audit storage capacity. @@ -5294,38 +5360,40 @@ TCP *.* @@remotesystemname RELP *.* :omrelp:remotesystemname:2514 Note that a port number was given as there is no standard port for RELP. -Satisfies: SRG-OS-000479-GPOS-00224, SRG-OS-000480-GPOS-00227, SRG-OS-000342-GPOS-00133</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000366CCI-001851Configure RHEL 9 to offload audit records onto a different system or media from the system being audited via TCP using rsyslog by specifying the remote logging server in "/etc/rsyslog.conf"" or "/etc/rsyslog.d/[customfile].conf" with the name or IP address of the log aggregation server. +Satisfies: SRG-OS-000479-GPOS-00224, SRG-OS-000480-GPOS-00227, SRG-OS-000342-GPOS-00133</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-001851Configure RHEL 9 to offload audit records onto a different system or media from the system being audited via TCP using rsyslog by specifying the remote logging server in "/etc/rsyslog.conf"" or "/etc/rsyslog.d/[customfile].conf" with the name or IP address of the log aggregation server. -*.* @@[remoteloggingserver]:[port]"Verify that RHEL 9 audit system offloads audit records onto a different system or media from the system being audited via rsyslog using TCP with the following command: +*.* @@[remoteloggingserver]:[port]"Verify that RHEL 9 audit system offloads audit records onto a different system or media from the system being audited via rsyslog using TCP with the following command: -$ sudo grep @@ /etc/rsyslog.conf /etc/rsyslog.d/*.conf +$ grep -i 'type="omfwd"' /etc/rsyslog.conf /etc/rsyslog.d/*.conf -/etc/rsyslog.conf:*.* @@[remoteloggingserver]:[port] +*.* action(type="omfwd" target="[remoteloggingserver]" protocol="tcp" port="[port]" If a remote server is not configured, or the line is commented out, ask the system administrator (SA) to indicate how the audit logs are offloaded to a different system or media. -If there is no evidence that the audit logs are being offloaded to another system or media, this is a finding.SRG-OS-000480-GPOS-00227<GroupDescription></GroupDescription>RHEL-09-652060RHEL 9 must use cron logging.<VulnDiscussion>Cron logging can be used to trace the successful or unsuccessful execution of cron jobs. It can also be used to spot intrusions into the use of the cron facility by unauthorized and malicious users.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000366Configure "rsyslog" to log all cron messages by adding or updating the following line to "/etc/rsyslog.conf" or a configuration file in the /etc/rsyslog.d/ directory: +If there is no evidence that the audit logs are being offloaded to another system or media, this is a finding.SRG-OS-000480-GPOS-00227<GroupDescription></GroupDescription>RHEL-09-652060RHEL 9 must use cron logging.<VulnDiscussion>Cron logging can be used to trace the successful or unsuccessful execution of cron jobs. It can also be used to spot intrusions into the use of the cron facility by unauthorized and malicious users.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000366Configure "rsyslog" to log all cron messages by adding or updating the following line to "/etc/rsyslog.conf" or a configuration file in the /etc/rsyslog.d/ directory: cron.* /var/log/cron The rsyslog daemon must be restarted for the changes to take effect: -$ sudo systemctl restart rsyslog.serviceVerify that "rsyslog" is configured to log cron events with the following command: +$ sudo systemctl restart rsyslog.serviceVerify that "rsyslog" is configured to log cron events with the following command: Note: If another logging package is used, substitute the utility configuration file for "/etc/rsyslog.conf" or "/etc/rsyslog.d/*.conf" files. -$ sudo grep -s cron /etc/rsyslog.conf /etc/rsyslog.d/*.conf +$ grep -s cron /etc/rsyslog.conf /etc/rsyslog.d/*.conf -/etc/rsyslog.conf:*.info;mail.none;authpriv.none;cron.none /var/log/messages -/etc/rsyslog.conf:cron.* /var/log/cron +/etc/rsyslog.conf:*.info;mail.none;authpriv.none;cron.none /var/log/messages +/etc/rsyslog.conf:cron.* /var/log/cron If the command does not return a response, check for cron logging all facilities with the following command: -$ sudo grep -s /var/log/messages /etc/rsyslog.conf /etc/rsyslog.d/*.conf +$ logger -p local0.info "Test message for all facilities." + +Check the logs for the test message with: -/etc/rsyslog.conf:*.info;mail.none;authpriv.none;cron.none /var/log/messages +$ sudo tail /var/log/messages -If "rsyslog" is not logging messages for the cron facility or all facilities, this is a finding.SRG-OS-000062-GPOS-00031<GroupDescription></GroupDescription>RHEL-09-653010RHEL 9 audit package must be installed.<VulnDiscussion>Without establishing what type of events occurred, the source of events, where events occurred, and the outcome of events, it would be difficult to establish, correlate, and investigate the events leading up to an outage or attack. +If "rsyslog" is not logging messages for the cron facility or all facilities, this is a finding.SRG-OS-000062-GPOS-00031<GroupDescription></GroupDescription>RHEL-09-653010RHEL 9 audit package must be installed.<VulnDiscussion>Without establishing what type of events occurred, the source of events, where events occurred, and the outcome of events, it would be difficult to establish, correlate, and investigate the events leading up to an outage or attack. Audit record content that may be necessary to satisfy this requirement includes, for example, time stamps, source and destination addresses, user/process identifiers, event descriptions, success/fail indications, filenames involved, and access control or flow control rules invoked. @@ -5333,11 +5401,11 @@ Associating event types with detected events in audit logs provides a means of i Satisfies: SRG-OS-000062-GPOS-00031, SRG-OS-000037-GPOS-00015, SRG-OS-000038-GPOS-00016, SRG-OS-000039-GPOS-00017, SRG-OS-000040-GPOS-00018, SRG-OS-000041-GPOS-00019, SRG-OS-000042-GPOS-00021, SRG-OS-000051-GPOS-00024, SRG-OS-000054-GPOS-00025, SRG-OS-000122-GPOS-00063, SRG-OS-000254-GPOS-00095, SRG-OS-000255-GPOS-00096, SRG-OS-000337-GPOS-00129, SRG-OS-000348-GPOS-00136, SRG-OS-000349-GPOS-00137, SRG-OS-000350-GPOS-00138, SRG-OS-000351-GPOS-00139, SRG-OS-000352-GPOS-00140, SRG-OS-000353-GPOS-00141, SRG-OS-000354-GPOS-00142, SRG-OS-000358-GPOS-00145, SRG-OS-000365-GPOS-00152, SRG-OS-000392-GPOS-00172, SRG-OS-000475-GPOS-00220, SRG-OS-000055-GPOS-00026</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000130CCI-000131CCI-000132CCI-000133CCI-000134CCI-000135CCI-000154CCI-000158CCI-000159CCI-000169CCI-000172CCI-001464CCI-001487CCI-003938CCI-001875CCI-001876CCI-001877CCI-001878CCI-001879CCI-001880CCI-001881CCI-001882CCI-001889CCI-001914CCI-002884CCI-001814Install the audit service package (if the audit service is not already installed) with the following command: -$ sudo dnf install auditVerify that the RHEL 9 audit service package is installed. +$ sudo dnf install auditVerify that the RHEL 9 audit service package is installed. Check that the audit service package is installed with the following command: -$ sudo dnf list --installed audit +$ dnf list --installed audit Example output: @@ -5357,7 +5425,7 @@ auditd.service - Security Auditing Service Loaded:loaded (/usr/lib/systemd/system/auditd.service; enabled; vendor preset: enabled) Active: active (running) since Tues 2022-05-24 12:56:56 EST; 4 weeks 0 days ago -If the audit service is not "active" and "running", this is a finding.SRG-OS-000047-GPOS-00023<GroupDescription></GroupDescription>RHEL-09-653020RHEL 9 audit system must take appropriate action when an error writing to the audit storage volume occurs.<VulnDiscussion>It is critical that when the operating system is at risk of failing to process audit logs as required, it takes action to mitigate the failure. Audit processing failures include software/hardware errors; failures in the audit capturing mechanisms; and audit storage capacity being reached or exceeded. Responses to audit failure depend upon the nature of the failure mode.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000140Configure RHEL 9 to shut down by default upon audit failure (unless availability is an overriding concern). +If the audit service is not "active" and "running", this is a finding.SRG-OS-000047-GPOS-00023<GroupDescription></GroupDescription>RHEL-09-653020RHEL 9 audit system must take appropriate action when an error writing to the audit storage volume occurs.<VulnDiscussion>It is critical that when the operating system is at risk of failing to process audit logs as required, it takes action to mitigate the failure. Audit processing failures include software/hardware errors; failures in the audit capturing mechanisms; and audit storage capacity being reached or exceeded. Responses to audit failure depend upon the nature of the failure mode.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000140Configure RHEL 9 to shut down by default upon audit failure (unless availability is an overriding concern). Add or update the following line (depending on configuration "disk_error_action" can be set to "SYSLOG" or "SINGLE" depending on configuration) in "/etc/audit/auditd.conf" file: @@ -5371,7 +5439,7 @@ $ sudo grep disk_error_action /etc/audit/auditd.conf disk_error_action = HALT -If the value of the "disk_error_action" option is not "SYSLOG", "SINGLE", or "HALT", or the line is commented out, ask the system administrator (SA) to indicate how the system takes appropriate action when an audit process failure occurs. If there is no evidence of appropriate action, this is a finding.SRG-OS-000047-GPOS-00023<GroupDescription></GroupDescription>RHEL-09-653025RHEL 9 audit system must take appropriate action when the audit storage volume is full.<VulnDiscussion>It is critical that when the operating system is at risk of failing to process audit logs as required, it takes action to mitigate the failure. Audit processing failures include software/hardware errors; failures in the audit capturing mechanisms; and audit storage capacity being reached or exceeded. Responses to audit failure depend upon the nature of the failure mode.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000140Configure RHEL 9 to shut down by default upon audit failure (unless availability is an overriding concern). +If the value of the "disk_error_action" option is not "SYSLOG", "SINGLE", or "HALT", or the line is commented out, ask the system administrator (SA) to indicate how the system takes appropriate action when an audit process failure occurs. If there is no evidence of appropriate action, this is a finding.SRG-OS-000047-GPOS-00023<GroupDescription></GroupDescription>RHEL-09-653025RHEL 9 audit system must take appropriate action when the audit storage volume is full.<VulnDiscussion>It is critical that when the operating system is at risk of failing to process audit logs as required, it takes action to mitigate the failure. Audit processing failures include software/hardware errors; failures in the audit capturing mechanisms; and audit storage capacity being reached or exceeded. Responses to audit failure depend upon the nature of the failure mode.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000140Configure RHEL 9 to shut down by default upon audit failure (unless availability is an overriding concern). Add or update the following line (depending on configuration "disk_full_action" can be set to "SYSLOG" or "SINGLE" depending on configuration) in "/etc/audit/auditd.conf" file: @@ -5385,7 +5453,7 @@ $ sudo grep disk_full_action /etc/audit/auditd.conf disk_full_action = HALT -If the value of the "disk_full_action" option is not "SYSLOG", "SINGLE", or "HALT", or the line is commented out, ask the system administrator (SA) to indicate how the system takes appropriate action when an audit storage volume is full. If there is no evidence of appropriate action, this is a finding.SRG-OS-000341-GPOS-00132<GroupDescription></GroupDescription>RHEL-09-653030RHEL 9 must allocate audit record storage capacity to store at least one week's worth of audit records.<VulnDiscussion>To ensure RHEL 9 systems have a sufficient storage capacity in which to write the audit logs, RHEL 9 needs to be able to allocate audit record storage capacity. +If the value of the "disk_full_action" option is not "SYSLOG", "SINGLE", or "HALT", or the line is commented out, ask the system administrator (SA) to indicate how the system takes appropriate action when an audit storage volume is full. If there is no evidence of appropriate action, this is a finding.SRG-OS-000341-GPOS-00132<GroupDescription></GroupDescription>RHEL-09-653030RHEL 9 must allocate audit record storage capacity to store at least one week's worth of audit records.<VulnDiscussion>To ensure RHEL 9 systems have a sufficient storage capacity in which to write the audit logs, RHEL 9 needs to be able to allocate audit record storage capacity. The task of allocating audit record storage capacity is usually performed during initial installation of RHEL 9. @@ -5393,18 +5461,20 @@ Satisfies: SRG-OS-000341-GPOS-00132, SRG-OS-000342-GPOS-00133</VulnDiscussion If audit records are stored on a partition made specifically for audit records, resize the partition with sufficient space to contain one week of audit records. -If audit records are not stored on a partition made specifically for audit records, a new partition with sufficient space will need be to be created.Verify RHEL 9 allocates audit record storage capacity to store at least one week of audit records when audit records are not immediately sent to a central audit record storage facility. +If audit records are not stored on a partition made specifically for audit records, a new partition with sufficient space will need be to be created.Verify RHEL 9 allocates audit record storage capacity to store at least one week of audit records when audit records are not immediately sent to a central audit record storage facility. -Note: The partition size needed to capture a week of audit records is based on the activity level of the system and the total storage capacity available. Typically 10.0 GB of storage space for audit records should be sufficient. +Note: The partition size needed to capture a week of audit records is based on the activity level of the system and the total storage capacity available. Typically 10.0GB of storage space for audit records should be sufficient. Determine which partition the audit records are being written to with the following command: -$ sudo grep log_file /etc/audit/auditd.conf +$ sudo grep -w log_file /etc/audit/auditd.conf + log_file = /var/log/audit/audit.log Check the size of the partition that audit records are written to with the following command and verify whether it is sufficiently large: # df -h /var/log/audit/ + /dev/sda2 24G 10.4G 13.6G 43% /var/log/audit If the audit record partition is not allocated for sufficient storage capacity, this is a finding.SRG-OS-000343-GPOS-00134<GroupDescription></GroupDescription>RHEL-09-653035RHEL 9 must take action when allocated audit record storage volume reaches 75 percent of the repository maximum audit record storage capacity.<VulnDiscussion>If security personnel are not notified immediately when storage volume reaches 75 percent utilization, they are unable to plan for audit record storage capacity expansion.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-001855Configure RHEL 9 to initiate an action to notify the SA and ISSO (at a minimum) when allocated audit record storage volume reaches 75 percent of the repository maximum audit record storage capacity by adding/modifying the following line in the /etc/audit/auditd.conf file. @@ -5447,7 +5517,7 @@ admin_space_left_action = single If the value of the "admin_space_left_action" is not set to "single", or if the line is commented out, ask the system administrator (SA) to indicate how the system is providing real-time alerts to the SA and information system security officer (ISSO). -If there is no evidence that real-time alerts are configured on the system, this is a finding.SRG-OS-000047-GPOS-00023<GroupDescription></GroupDescription>RHEL-09-653055RHEL 9 audit system must take appropriate action when the audit files have reached maximum size.<VulnDiscussion>It is critical that when the operating system is at risk of failing to process audit logs as required, it takes action to mitigate the failure. Audit processing failures include software/hardware errors; failures in the audit capturing mechanisms; and audit storage capacity being reached or exceeded. Responses to audit failure depend upon the nature of the failure mode.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000140Configure RHEL 9 to rotate the audit log when it reaches maximum size. +If there is no evidence that real-time alerts are configured on the system, this is a finding.SRG-OS-000047-GPOS-00023<GroupDescription></GroupDescription>RHEL-09-653055RHEL 9 audit system must take appropriate action when the audit files have reached maximum size.<VulnDiscussion>It is critical that when the operating system is at risk of failing to process audit logs as required, it takes action to mitigate the failure. Audit processing failures include software/hardware errors; failures in the audit capturing mechanisms; and audit storage capacity being reached or exceeded. Responses to audit failure depend upon the nature of the failure mode.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000140Configure RHEL 9 to rotate the audit log when it reaches maximum size. Add or update the following line in "/etc/audit/auditd.conf" file: @@ -5505,11 +5575,11 @@ $ sudo grep action_mail_acct /etc/audit/auditd.conf action_mail_acct = root -If the value of the "action_mail_acct" keyword is not set to "root" and/or other accounts for security personnel, the "action_mail_acct" keyword is missing, or the retuned line is commented out, ask the SA to indicate how they and the ISSO are notified of an audit process failure. If there is no evidence of the proper personnel being notified of an audit processing failure, this is a finding.SRG-OS-000062-GPOS-00031<GroupDescription></GroupDescription>RHEL-09-653075RHEL 9 audit system must audit local events.<VulnDiscussion>Without establishing what type of events occurred, the source of events, where events occurred, and the outcome of events, it would be difficult to establish, correlate, and investigate the events leading up to an outage or attack. +If the value of the "action_mail_acct" keyword is not set to "root" and/or other accounts for security personnel, the "action_mail_acct" keyword is missing, or the retuned line is commented out, ask the SA to indicate how they and the ISSO are notified of an audit process failure. If there is no evidence of the proper personnel being notified of an audit processing failure, this is a finding.SRG-OS-000062-GPOS-00031<GroupDescription></GroupDescription>RHEL-09-653075RHEL 9 audit system must audit local events.<VulnDiscussion>Without establishing what type of events occurred, the source of events, where events occurred, and the outcome of events, it would be difficult to establish, correlate, and investigate the events leading up to an outage or attack. If option "local_events" isn't set to "yes" only events from network will be aggregated. -Satisfies: SRG-OS-000062-GPOS-00031, SRG-OS-000480-GPOS-00227</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000169CCI-000366Configure RHEL 9 to generate audit records for local events by adding or updating the following line in "/etc/audit/auditd.conf": +Satisfies: SRG-OS-000062-GPOS-00031, SRG-OS-000480-GPOS-00227</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000169Configure RHEL 9 to generate audit records for local events by adding or updating the following line in "/etc/audit/auditd.conf": local_events = yes @@ -5547,39 +5617,39 @@ $ sudo stat -c "%G %n" /var/log/audit/audit.log root /var/log/audit/audit.log -If the audit log is not group-owned by "root" or the configured alternative logging group, this is a finding.SRG-OS-000057-GPOS-00027<GroupDescription></GroupDescription>RHEL-09-653085RHEL 9 audit log directory must be owned by root to prevent unauthorized read access.<VulnDiscussion>Unauthorized disclosure of audit records can reveal system and configuration data to attackers, thus compromising its confidentiality. +If the audit log is not group-owned by "root" or the configured alternative logging group, this is a finding.SRG-OS-000057-GPOS-00027<GroupDescription></GroupDescription>RHEL-09-653085RHEL 9 audit log directory must be owned by root to prevent unauthorized read access.<VulnDiscussion>Unauthorized disclosure of audit records can reveal system and configuration data to attackers, thus compromising its confidentiality. Satisfies: SRG-OS-000057-GPOS-00027, SRG-OS-000058-GPOS-00028, SRG-OS-000059-GPOS-00029, SRG-OS-000206-GPOS-00084</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000162CCI-000163CCI-000164CCI-001314Configure the audit log to be protected from unauthorized read access by setting the correct owner as "root" with the following command: -$ sudo chown root /var/log/auditVerify the audit logs directory is owned by "root". +$ sudo chown root /var/log/auditVerify the audit logs directory is owned by "root". -First determine where the audit logs are stored with the following command: +Determine where the audit logs are stored with the following command: $ sudo grep -iw log_file /etc/audit/auditd.conf log_file = /var/log/audit/audit.log -Then using the location of the audit log file, determine if the audit log directory is owned by "root" using the following command: +Using the location of the audit log file, determine if the audit log directory is owned by "root" using the following command: -$ sudo ls -ld /var/log/audit +$ sudo stat -c '%U %n' /var/log/audit -drwx------ 2 root root 23 Jun 11 11:56 /var/log/audit +root /var/log/audit -If the audit log directory is not owned by "root", this is a finding.SRG-OS-000057-GPOS-00027<GroupDescription></GroupDescription>RHEL-09-653090RHEL 9 audit logs file must have mode 0600 or less permissive to prevent unauthorized access to the audit log.<VulnDiscussion>Only authorized personnel should be aware of errors and the details of the errors. Error messages are an indicator of an organization's operational state or can identify the RHEL 9 system or platform. Additionally, Personally Identifiable Information (PII) and operational information must not be revealed through error messages to unauthorized personnel or their designated representatives. +If the audit log directory is not owned by "root", this is a finding.SRG-OS-000057-GPOS-00027<GroupDescription></GroupDescription>RHEL-09-653090RHEL 9 audit logs file must have mode 0600 or less permissive to prevent unauthorized access to the audit log.<VulnDiscussion>Only authorized personnel should be aware of errors and the details of the errors. Error messages are an indicator of an organization's operational state or can identify the RHEL 9 system or platform. Additionally, Personally Identifiable Information (PII) and operational information must not be revealed through error messages to unauthorized personnel or their designated representatives. The structure and content of error messages must be carefully considered by the organization and development team. The extent to which the information system is able to identify and handle error conditions is guided by organizational policy and operational requirements. -Satisfies: SRG-OS-000057-GPOS-00027, SRG-OS-000058-GPOS-00028, SRG-OS-000059-GPOS-00029, SRG-OS-000206-GPOS-00084</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000162CCI-000163CCI-000164CCI-001314Configure the audit logs to have a mode of "0600" with the following command: +Satisfies: SRG-OS-000057-GPOS-00027, SRG-OS-000058-GPOS-00028, SRG-OS-000059-GPOS-00029, SRG-OS-000206-GPOS-00084</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000162CCI-000163CCI-000164CCI-001314Configure the audit logs to have a mode of "0600" with the following command: -Replace "[audit_log_file]" to the correct audit log path, by default this location is "/var/log/audit/audit.log". +Replace "[audit_log_file]" with the path to each audit log file. By default, these logs are located in "/var/log/audit/. $ sudo chmod 0600 /var/log/audit/[audit_log_file] Check the group that owns the system audit logs: -$ sudo grep -m 1 -q ^log_group /etc/audit/auditd.conf +$ sudo grep -iw log_group /etc/audit/auditd.conf -If the log_group is not defined or it is set to root, configure the permissions the following way: +If log_group is set to a user other than root, configure the permissions the following way: $ sudo chmod 0640 $log_file $ sudo chmod 0440 $log_file.* @@ -5587,17 +5657,17 @@ $ sudo chmod 0440 $log_file.* Otherwise, configure the permissions the following way: $ sudo chmod 0600 $log_file -$ sudo chmod 0400 $log_file.*Verify the audit logs have a mode of "0600". +$ sudo chmod 0400 $log_file.*Verify the audit logs have a mode of "0600". -First determine where the audit logs are stored with the following command: +Determine where the audit logs are stored with the following command: $ sudo grep -iw log_file /etc/audit/auditd.conf log_file = /var/log/audit/audit.log -Then using the location of the audit log file, determine if the audit log files as a mode of "0640" with the following command: +Using the location of the audit log file, determine the mode of each audit log with the following command: -$ sudo ls -la /var/log/audit/*.log +$ sudo find /var/log/audit/ -type f -exec stat -c '%a %n' {} \; rw-------. 2 root root 237923 Jun 11 11:56 /var/log/audit/audit.log @@ -5639,17 +5709,17 @@ $ sudo grep write_logs /etc/audit/auditd.conf write_logs = yes -If "write_logs" does not have a value of "yes", the line is commented out, or the line is missing, this is a finding.SRG-OS-000063-GPOS-00032<GroupDescription></GroupDescription>RHEL-09-653110RHEL 9 must allow only the information system security manager (ISSM) (or individuals or roles appointed by the ISSM) to select which auditable events are to be audited.<VulnDiscussion>Without the capability to restrict the roles and individuals that can select which events are audited, unauthorized personnel may be able to prevent the auditing of critical events. Misconfigured audits may degrade the system's performance by overwhelming the audit log. Misconfigured audits may also make it more difficult to establish, correlate, and investigate the events relating to an incident or identify those responsible for one.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000171Configure the files in directory "/etc/audit/rules.d/" and the "/etc/audit/auditd.conf" file to have a mode of "0640" with the following commands: +If "write_logs" does not have a value of "yes", the line is commented out, or the line is missing, this is a finding.SRG-OS-000063-GPOS-00032<GroupDescription></GroupDescription>RHEL-09-653110RHEL 9 must allow only the information system security manager (ISSM) (or individuals or roles appointed by the ISSM) to select which auditable events are to be audited.<VulnDiscussion>Without the capability to restrict the roles and individuals that can select which events are audited, unauthorized personnel may be able to prevent the auditing of critical events. Misconfigured audits may degrade the system's performance by overwhelming the audit log. Misconfigured audits may also make it more difficult to establish, correlate, and investigate the events relating to an incident or identify those responsible for one.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000171Configure the files in directory "/etc/audit/rules.d/" and the "/etc/audit/auditd.conf" file to have a mode of "0640" with the following commands: $ sudo chmod 0640 /etc/audit/rules.d/audit.rules $ sudo chmod 0640 /etc/audit/rules.d/[customrulesfile].rules -$ sudo chmod 0640 /etc/audit/auditd.confVerify that the files in directory "/etc/audit/rules.d/" and "/etc/audit/auditd.conf" file have a mode of "0640" or less permissive with the following command: - -# stat -c "%a %n" /etc/audit/rules.d/*.rules +$ sudo chmod 0640 /etc/audit/auditd.confVerify that the files in directory "/etc/audit/rules.d/" and "/etc/audit/auditd.conf" file have a mode of "0640" or less permissive with the following command: -640 /etc/audit/rules.d/audit.rules +$ sudo find /etc/audit/rules.d/ /etc/audit/audit.rules /etc/audit/auditd.conf -type f -exec stat -c "%a %n" {} \; -If the files in the "/etc/audit/rules.d/" directory or the "/etc/audit/auditd.conf" file have a mode more permissive than "0640", this is a finding.SRG-OS-000063-GPOS-00032<GroupDescription></GroupDescription>RHEL-09-653115RHEL 9 /etc/audit/auditd.conf file must have 0640 or less permissive to prevent unauthorized access.<VulnDiscussion>Without the capability to restrict the roles and individuals that can select which events are audited, unauthorized personnel may be able to prevent the auditing of critical events. Misconfigured audits may degrade the system's performance by overwhelming the audit log. Misconfigured audits may also make it more difficult to establish, correlate, and investigate the events relating to an incident or identify those responsible for one.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000171Set the mode of /etc/audit/auditd.conf file to 0640 with the command: +600 /etc/audit/rules.d/audit.rules +640 /etc/audit/audit.rules +640 /etc/audit/auditd.confSRG-OS-000063-GPOS-00032<GroupDescription></GroupDescription>RHEL-09-653115RHEL 9 /etc/audit/auditd.conf file must have 0640 or less permissive to prevent unauthorized access.<VulnDiscussion>Without the capability to restrict the roles and individuals that can select which events are audited, unauthorized personnel may be able to prevent the auditing of critical events. Misconfigured audits may degrade the system's performance by overwhelming the audit log. Misconfigured audits may also make it more difficult to establish, correlate, and investigate the events relating to an incident or identify those responsible for one.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000171Set the mode of /etc/audit/auditd.conf file to 0640 with the command: $ sudo chmod 0640 /etc/audit/auditd.confVerify the mode of /etc/audit/auditd.conf with the command: @@ -5694,19 +5764,19 @@ Query the Postfix alias maps for an alias for the root user with the following c $ postmap -q root hash:/etc/aliases isso -If an alias is not set, this is a finding.SRG-OS-000342-GPOS-00133<GroupDescription></GroupDescription>RHEL-09-653130RHEL 9 audispd-plugins package must be installed.<VulnDiscussion>"audispd-plugins" provides plugins for the real-time interface to the audit subsystem, "audispd". These plugins can do things like relay events to remote machines or analyze events for suspicious behavior.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-001851The audispd-plugins package can be installed with the following command: +If an alias is not set, this is a finding.SRG-OS-000342-GPOS-00133<GroupDescription></GroupDescription>RHEL-09-653130RHEL 9 audispd-plugins package must be installed.<VulnDiscussion>"audispd-plugins" provides plugins for the real-time interface to the audit subsystem, "audispd". These plugins can do things like relay events to remote machines or analyze events for suspicious behavior.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-001851The audispd-plugins package can be installed with the following command: -$ sudo dnf install audispd-pluginsVerify that RHEL 9 has the audispd-plugins package for installed with the following command: +$ sudo dnf install audispd-pluginsVerify that RHEL 9 has the audispd-plugins package installed with the following command: -$ sudo dnf list --installed audispd-plugins +$ dnf list --installed audispd-plugins Example output: audispd-plugins.x86_64 3.0.7-101.el9_0.2 -If the "audispd-plugins" package is not installed, this is a finding.SRG-OS-000326-GPOS-00126<GroupDescription></GroupDescription>RHEL-09-654010RHEL 9 must audit uses of the "execve" system call.<VulnDiscussion>Misuse of privileged functions, either intentionally or unintentionally by authorized users, or by unauthorized external entities that have compromised information system accounts, is a serious and ongoing concern and can have significant adverse impacts on organizations. Auditing the use of privileged functions is one way to detect such misuse and identify the risk from insider threats and the advanced persistent threat. +If the "audispd-plugins" package is not installed, this is a finding.SRG-OS-000326-GPOS-00126<GroupDescription></GroupDescription>RHEL-09-654010RHEL 9 must audit uses of the "execve" system call.<VulnDiscussion>Misuse of privileged functions, either intentionally or unintentionally by authorized users, or by unauthorized external entities that have compromised information system accounts, is a serious and ongoing concern and can have significant adverse impacts on organizations. Auditing the use of privileged functions is one way to detect such misuse and identify the risk from insider threats and the advanced persistent threat. -Satisfies: SRG-OS-000326-GPOS-00126, SRG-OS-000327-GPOS-00127</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-002233CCI-002234Configure RHEL 9 to audit the execution of the "execve" system call. +Satisfies: SRG-OS-000326-GPOS-00126, SRG-OS-000327-GPOS-00127</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-002233CCI-002234Configure RHEL 9 to audit the execution of the "execve" system call. Add or update the following file system rules to "/etc/audit/rules.d/audit.rules": @@ -5715,18 +5785,18 @@ Add or update the following file system rules to "/etc/audit/rules.d/audit.rules -a always,exit -F arch=b32 -S execve -C gid!=egid -F egid=0 -k execpriv -a always,exit -F arch=b64 -S execve -C gid!=egid -F egid=0 -k execpriv -The audit daemon must be restarted for the changes to take effect. +To load the rules to the kernel immediately, use the following command: -$ sudo service auditd restartVerify that RHEL 9 is configured to audit the execution of the "execve" system call with the following command: +$ sudo augenrules --loadVerify that RHEL 9 is configured to audit the execution of the "execve" system call with the following command: $ sudo auditctl -l | grep execve --a always,exit -F arch=b32 -S execve -C uid!=euid -F euid=0 -k execpriv --a always,exit -F arch=b64 -S execve -C uid!=euid -F euid=0 -k execpriv --a always,exit -F arch=b32 -S execve -C gid!=egid -F egid=0 -k execpriv --a always,exit -F arch=b64 -S execve -C gid!=egid -F egid=0 -k execpriv +-a always,exit -F arch=b32 -S execve -C uid!=euid -F euid=0 -F key=execpriv +-a always,exit -F arch=b64 -S execve -C uid!=euid -F euid=0 -F key=execpriv +-a always,exit -F arch=b32 -S execve -C gid!=egid -F egid=0 -F key=execpriv +-a always,exit -F arch=b64 -S execve -C gid!=egid -F egid=0 -F key=execpriv -If the command does not return all lines, or the lines are commented out, this is a finding.SRG-OS-000037-GPOS-00015<GroupDescription></GroupDescription>RHEL-09-654015RHEL 9 must audit all uses of the chmod, fchmod, and fchmodat system calls.<VulnDiscussion>Without generating audit records that are specific to the security and mission needs of the organization, it would be difficult to establish, correlate, and investigate the events relating to an incident or identify those responsible for one. +If the command does not return all lines, or the lines are commented out, this is a finding.SRG-OS-000037-GPOS-00015<GroupDescription></GroupDescription>RHEL-09-654015RHEL 9 must audit all uses of the chmod, fchmod, and fchmodat system calls.<VulnDiscussion>Without generating audit records that are specific to the security and mission needs of the organization, it would be difficult to establish, correlate, and investigate the events relating to an incident or identify those responsible for one. Audit records can be generated from various components within the information system (e.g., module or policy filter). @@ -5734,24 +5804,23 @@ When a user logs on, the auid is set to the uid of the account being authenticat The system call rules are loaded into a matching engine that intercepts each system call made by all programs on the system. Therefore, it is very important to use system call rules only when absolutely necessary since these affect performance. The more rules, the bigger the performance hit. The performance can be helped, however, by combining system calls into one rule whenever possible. -Satisfies: SRG-OS-000037-GPOS-00015, SRG-OS-000042-GPOS-00020, SRG-OS-000062-GPOS-00031, SRG-OS-000392-GPOS-00172, SRG-OS-000462-GPOS-00206, SRG-OS-000471-GPOS-00215, SRG-OS-000064-GPOS-00033, SRG-OS-000466-GPOS-00210, SRG-OS-000458-GPOS-00203</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000130CCI-000135CCI-000169CCI-000172CCI-002884Configure RHEL 9 to generate audit records upon successful/unsuccessful attempts to use the "chmod", "fchmod", and "fchmodat" syscalls. +Satisfies: SRG-OS-000037-GPOS-00015, SRG-OS-000042-GPOS-00020, SRG-OS-000062-GPOS-00031, SRG-OS-000392-GPOS-00172, SRG-OS-000462-GPOS-00206, SRG-OS-000471-GPOS-00215, SRG-OS-000064-GPOS-00033, SRG-OS-000466-GPOS-00210, SRG-OS-000458-GPOS-00203</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000130CCI-000135CCI-000169CCI-000172CCI-002884Configure RHEL 9 to generate audit records upon successful/unsuccessful attempts to use the "chmod", "fchmod", and "fchmodat" syscalls. Add or update the following rules in "/etc/audit/rules.d/audit.rules": -a always,exit -F arch=b32 -S chmod,fchmod,fchmodat -F auid>=1000 -F auid!=unset -k perm_mod - -a always,exit -F arch=b64 -S chmod,fchmod,fchmodat -F auid>=1000 -F auid!=unset -k perm_mod -The audit daemon must be restarted for the changes to take effect. +To load the rules to the kernel immediately, use the following command: -$ sudo service auditd restartVerify that RHEL 9 is configured to audit the execution of the "chmod", "fchmod", and "fchmodat" system calls with the following command: +$ sudo augenrules --loadVerify that RHEL 9 is configured to audit the execution of the "chmod", "fchmod", and "fchmodat" system calls with the following command: $ sudo auditctl -l | grep chmod --a always,exit -F arch=b32 -S chmod,fchmod,fchmodat -F auid>=1000 -F auid!=unset -k perm_mod --a always,exit -F arch=b64 -S chmod,fchmod,fchmodat -F auid>=1000 -F auid!=unset -k perm_mod +-a always,exit -F arch=b32 -S chmod,fchmod,fchmodat -F auid>=1000 -F auid!=-1 -F key=perm_mod +-a always,exit -F arch=b64 -S chmod,fchmod,fchmodat -F auid>=1000 -F auid!=-1 -F key=perm_mod -If both the "b32" and "b64" audit rules are not defined for the "chmod", "fchmod", and "fchmodat" system calls, this is a finding.SRG-OS-000037-GPOS-00015<GroupDescription></GroupDescription>RHEL-09-654020RHEL 9 must audit all uses of the chown, fchown, fchownat, and lchown system calls.<VulnDiscussion>Without generating audit records that are specific to the security and mission needs of the organization, it would be difficult to establish, correlate, and investigate the events relating to an incident or identify those responsible for one. +If both the "b32" and "b64" audit rules are not defined for the "chmod", "fchmod", and "fchmodat" system calls, this is a finding.SRG-OS-000037-GPOS-00015<GroupDescription></GroupDescription>RHEL-09-654020RHEL 9 must audit all uses of the chown, fchown, fchownat, and lchown system calls.<VulnDiscussion>Without generating audit records that are specific to the security and mission needs of the organization, it would be difficult to establish, correlate, and investigate the events relating to an incident or identify those responsible for one. Audit records can be generated from various components within the information system (e.g., module or policy filter). @@ -5759,23 +5828,23 @@ When a user logs on, the auid is set to the uid of the account being authenticat The system call rules are loaded into a matching engine that intercepts each system call made by all programs on the system. Therefore, it is very important to use system call rules only when absolutely necessary since these affect performance. The more rules, the bigger the performance hit. The performance can be helped, however, by combining system calls into one rule whenever possible. -Satisfies: SRG-OS-000037-GPOS-00015, SRG-OS-000042-GPOS-00020, SRG-OS-000062-GPOS-00031, SRG-OS-000392-GPOS-00172, SRG-OS-000462-GPOS-00206, SRG-OS-000471-GPOS-00215, SRG-OS-000064-GPOS-00033, SRG-OS-000466-GPOS-00210, SRG-OS-000458-GPOS-00203, SRG-OS-000474-GPOS-00219</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000130CCI-000135CCI-000169CCI-000172CCI-002884Configure RHEL 9 to generate audit records upon successful/unsuccessful attempts to use the "chown", "fchown", "fchownat", and "lchown"" system calls. +Satisfies: SRG-OS-000037-GPOS-00015, SRG-OS-000042-GPOS-00020, SRG-OS-000062-GPOS-00031, SRG-OS-000392-GPOS-00172, SRG-OS-000462-GPOS-00206, SRG-OS-000471-GPOS-00215, SRG-OS-000064-GPOS-00033, SRG-OS-000466-GPOS-00210, SRG-OS-000458-GPOS-00203, SRG-OS-000474-GPOS-00219</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000130CCI-000135CCI-000169CCI-000172CCI-002884Configure RHEL 9 to generate audit records upon successful/unsuccessful attempts to use the "chown", "fchown", "fchownat", and "lchown"" system calls. Add or update the following rules in "/etc/audit/rules.d/audit.rules": -a always,exit -F arch=b32 -S chown,fchown,fchownat,lchown -F auid>=1000 -F auid!=unset -k perm_mod -a always,exit -F arch=b64 -S chown,fchown,fchownat,lchown -F auid>=1000 -F auid!=unset -k perm_mod -The audit daemon must be restarted for the changes to take effect. +To load the rules to the kernel immediately, use the following command: -$ sudo service auditd restartVerify that RHEL 9 is configured to audit the execution of the "chown", "fchown", "fchownat", and "lchown" system calls with the following command: +$ sudo augenrules --loadVerify that RHEL 9 is configured to audit the execution of the "chown", "fchown", "fchownat", and "lchown" system calls with the following command: $ sudo auditctl -l | grep chown --a always,exit -F arch=b32 -S chown,fchown,fchownat,lchown -F auid>=1000 -F auid!=unset -k perm_mod --a always,exit -F arch=b64 -S chown,fchown,fchownat,lchown -F auid>=1000 -F auid!=unset -k perm_mod +-a always,exit -F arch=b32 -S lchown,fchown,chown,fchownat -F auid>=1000 -F auid!=-1 -F key=perm_mod +-a always,exit -F arch=b64 -S chown,fchown,lchown,fchownat -F auid>=1000 -F auid!=-1 -F key=perm_mod -If both the "b32" and "b64" audit rules are not defined for the "chown", "fchown", "fchownat", and "lchown" system calls, this is a finding.SRG-OS-000037-GPOS-00015<GroupDescription></GroupDescription>RHEL-09-654025RHEL 9 must audit all uses of the setxattr, fsetxattr, lsetxattr, removexattr, fremovexattr, and lremovexattr system calls.<VulnDiscussion>Without generating audit records that are specific to the security and mission needs of the organization, it would be difficult to establish, correlate, and investigate the events relating to an incident or identify those responsible for one. +If both the "b32" and "b64" audit rules are not defined for the "chown", "fchown", "fchownat", and "lchown" system calls, this is a finding.SRG-OS-000037-GPOS-00015<GroupDescription></GroupDescription>RHEL-09-654025RHEL 9 must audit all uses of the setxattr, fsetxattr, lsetxattr, removexattr, fremovexattr, and lremovexattr system calls.<VulnDiscussion>Without generating audit records that are specific to the security and mission needs of the organization, it would be difficult to establish, correlate, and investigate the events relating to an incident or identify those responsible for one. Audit records can be generated from various components within the information system (e.g., module or policy filter). @@ -5783,47 +5852,45 @@ When a user logs on, the auid is set to the uid of the account being authenticat The system call rules are loaded into a matching engine that intercepts each system call made by all programs on the system. Therefore, it is very important to use system call rules only when absolutely necessary since these affect performance. The more rules, the bigger the performance hit. The performance can be helped, however, by combining system calls into one rule whenever possible. -Satisfies: SRG-OS-000037-GPOS-00015, SRG-OS-000042-GPOS-00020, SRG-OS-000062-GPOS-00031, SRG-OS-000392-GPOS-00172, SRG-OS-000458-GPOS-00203, SRG-OS-000462-GPOS-00206, SRG-OS-000463-GPOS-00207, SRG-OS-000471-GPOS-00215, SRG-OS-000474-GPOS-00219, SRG-OS-000466-GPOS-00210, SRG-OS-000064-GPOS-00033</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000130CCI-000135CCI-000169CCI-000172CCI-002884Configure RHEL 9 to audit the execution of the "setxattr", "fsetxattr", "lsetxattr", "removexattr", "fremovexattr", and "lremovexattr" system calls by adding or updating the following lines to "/etc/audit/rules.d/audit.rules": +Satisfies: SRG-OS-000037-GPOS-00015, SRG-OS-000042-GPOS-00020, SRG-OS-000062-GPOS-00031, SRG-OS-000392-GPOS-00172, SRG-OS-000458-GPOS-00203, SRG-OS-000462-GPOS-00206, SRG-OS-000463-GPOS-00207, SRG-OS-000471-GPOS-00215, SRG-OS-000474-GPOS-00219, SRG-OS-000466-GPOS-00210, SRG-OS-000064-GPOS-00033</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000130CCI-000135CCI-000169CCI-000172CCI-002884Configure RHEL 9 to audit the execution of the "setxattr", "fsetxattr", "lsetxattr", "removexattr", "fremovexattr", and "lremovexattr" system calls by adding or updating the following lines to "/etc/audit/rules.d/audit.rules": -a always,exit -F arch=b32 -S setxattr,fsetxattr,lsetxattr,removexattr,fremovexattr,lremovexattr -F auid>=1000 -F auid!=unset -k perm_mod -a always,exit -F arch=b64 -S setxattr,fsetxattr,lsetxattr,removexattr,fremovexattr,lremovexattr -F auid>=1000 -F auid!=unset -k perm_mod - -a always,exit -F arch=b32 -S setxattr,fsetxattr,lsetxattr,removexattr,fremovexattr,lremovexattr -F auid=0 -k perm_mod -a always,exit -F arch=b64 -S setxattr,fsetxattr,lsetxattr,removexattr,fremovexattr,lremovexattr -F auid=0 -k perm_mod -The audit daemon must be restarted for the changes to take effect. +To load the rules to the kernel immediately, use the following command: -$ sudo service auditd restartVerify that RHEL 9 is configured to audit the execution of the "setxattr", "fsetxattr", "lsetxattr", "removexattr", "fremovexattr", and "lremovexattr" system calls with the following command: +$ sudo augenrules --loadVerify that RHEL 9 is configured to audit the execution of the "setxattr", "fsetxattr", "lsetxattr", "removexattr", "fremovexattr", and "lremovexattr" system calls with the following command: $ sudo auditctl -l | grep xattr --a always,exit -F arch=b32 -S setxattr,fsetxattr,lsetxattr,removexattr,fremovexattr,lremovexattr -F auid>=1000 -F auid!=unset -k perm_mod --a always,exit -F arch=b64 -S setxattr,fsetxattr,lsetxattr,removexattr,fremovexattr,lremovexattr -F auid>=1000 -F auid!=unset -k perm_mod +-a always,exit -F arch=b32 -S setxattr,lsetxattr,fsetxattr,removexattr,lremovexattr,fremovexattr -F auid>=1000 -F auid!=-1 -F key=perm_mod +-a always,exit -F arch=b64 -S setxattr,lsetxattr,fsetxattr,removexattr,lremovexattr,fremovexattr -F auid>=1000 -F auid!=-1 -F key=perm_mod +-a always,exit -F arch=b32 -S setxattr,lsetxattr,fsetxattr,removexattr,lremovexattr,fremovexattr -F auid=0 -F key=perm_mod +-a always,exit -F arch=b64 -S setxattr,lsetxattr,fsetxattr,removexattr,lremovexattr,fremovexattr -F auid=0 -F key=perm_mod --a always,exit -F arch=b32 -S setxattr,fsetxattr,lsetxattr,removexattr,fremovexattr,lremovexattr -F auid=0 -k perm_mod --a always,exit -F arch=b64 -S setxattr,fsetxattr,lsetxattr,removexattr,fremovexattr,lremovexattr -F auid=0 -k perm_mod +If both the "b32" and "b64" audit rules are not defined for the "chmod", "fchmod", and "fchmodat" system calls "setxattr", "fsetxattr", "lsetxattr", "removexattr", "fremovexattr", and "lremovexattr" system calls, or any of the lines returned are commented out, this is a finding.SRG-OS-000037-GPOS-00015<GroupDescription></GroupDescription>RHEL-09-654030RHEL 9 must audit all uses of umount system calls.<VulnDiscussion>Without generating audit records specific to the security and mission needs of the organization, it would be difficult to establish, correlate, and investigate the events relating to an incident or identify those responsible for one. -If both the "b32" and "b64" audit rules are not defined for the "chmod", "fchmod", and "fchmodat" system calls "setxattr", "fsetxattr", "lsetxattr", "removexattr", "fremovexattr", and "lremovexattr" system calls, or any of the lines returned are commented out, this is a finding.SRG-OS-000037-GPOS-00015<GroupDescription></GroupDescription>RHEL-09-654030RHEL 9 must audit all uses of umount system calls.<VulnDiscussion>Without generating audit records specific to the security and mission needs of the organization, it would be difficult to establish, correlate, and investigate the events relating to an incident or identify those responsible for one. - -Audit records can be generated from various components within the information system (e.g., module or policy filter). - -When a user logs on, the auid is set to the uid of the account being authenticated. Daemons are not user sessions and have the loginuid set to -1. The auid representation is an unsigned 32-bit integer, which equals 4294967295. The audit system interprets -1, 4294967295, and "unset" in the same way. - -The system call rules are loaded into a matching engine that intercepts each system call made by all programs on the system. Therefore, it is very important to use system call rules only when absolutely necessary since these affect performance. The more rules, the bigger the performance hit. The performance can be helped, however, by combining system calls into one rule whenever possible. - -Satisfies: SRG-OS-000037-GPOS-00015, SRG-OS-000062-GPOS-00031, SRG-OS-000392-GPOS-00172, SRG-OS-000462-GPOS-00206, SRG-OS-000471-GPOS-00215</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000130CCI-000169CCI-000172CCI-002884Configure RHEL 9 to generate audit records upon successful/unsuccessful attempts to use the "umount" command by adding or updating the following rules in "/etc/audit/rules.d/audit.rules": - --a always,exit -F path=/usr/bin/umount -F perm=x -F auid>=1000 -F auid!=unset -k privileged-mount - -The audit daemon must be restarted for the changes to take effect. - -$ sudo service auditd restartVerify that RHEL 9 is configured to audit the execution of the "umount" command with the following command: +Audit records can be generated from various components within the information system (e.g., module or policy filter). -$ sudo auditctl -l | grep umount +When a user logs on, the auid is set to the uid of the account being authenticated. Daemons are not user sessions and have the loginuid set to -1. The auid representation is an unsigned 32-bit integer, which equals 4294967295. The audit system interprets -1, 4294967295, and "unset" in the same way. + +The system call rules are loaded into a matching engine that intercepts each system call made by all programs on the system. Therefore, it is very important to use system call rules only when absolutely necessary since these affect performance. The more rules, the bigger the performance hit. The performance can be helped, however, by combining system calls into one rule whenever possible. + +Satisfies: SRG-OS-000037-GPOS-00015, SRG-OS-000062-GPOS-00031, SRG-OS-000392-GPOS-00172, SRG-OS-000462-GPOS-00206, SRG-OS-000471-GPOS-00215</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000130CCI-000169CCI-000172CCI-002884Configure RHEL 9 to generate audit records upon successful/unsuccessful attempts to use the "umount" command by adding or updating the following rules in "/etc/audit/rules.d/audit.rules": -a always,exit -F path=/usr/bin/umount -F perm=x -F auid>=1000 -F auid!=unset -k privileged-mount -If the command does not return an audit rule for "umount" or any of the lines returned are commented out, this is a finding.SRG-OS-000037-GPOS-00015<GroupDescription></GroupDescription>RHEL-09-654035RHEL 9 must audit all uses of the chacl command.<VulnDiscussion>Without generating audit records specific to the security and mission needs of the organization, it would be difficult to establish, correlate, and investigate the events relating to an incident or identify those responsible for one. +To load the rules to the kernel immediately, use the following command: + +$ sudo augenrules --loadVerify that RHEL 9 is configured to audit the execution of the "umount" command with the following command: + +$ sudo auditctl -l | grep /usr/bin/umount + +-a always,exit -S all -F path=/usr/bin/umount -F perm=x -F auid>=1000 -F auid!=-1 -F key=privileged-mount + +If the command does not return an audit rule for "umount" or any of the lines returned are commented out, this is a finding.SRG-OS-000037-GPOS-00015<GroupDescription></GroupDescription>RHEL-09-654035RHEL 9 must audit all uses of the chacl command.<VulnDiscussion>Without generating audit records specific to the security and mission needs of the organization, it would be difficult to establish, correlate, and investigate the events relating to an incident or identify those responsible for one. Audit records can be generated from various components within the information system (e.g., module or policy filter). @@ -5831,19 +5898,19 @@ When a user logs on, the auid is set to the uid of the account being authenticat The system call rules are loaded into a matching engine that intercepts each system call made by all programs on the system. Therefore, it is very important to use system call rules only when absolutely necessary since these affect performance. The more rules, the bigger the performance hit. The performance can be helped, however, by combining system calls into one rule whenever possible. -Satisfies: SRG-OS-000037-GPOS-00015, SRG-OS-000042-GPOS-00020, SRG-OS-000062-GPOS-00031, SRG-OS-000392-GPOS-00172, SRG-OS-000462-GPOS-00206, SRG-OS-000471-GPOS-00215, SRG-OS-000466-GPOS-00210</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000130CCI-000135CCI-000169CCI-000172CCI-002884Configure RHEL 9 to generate audit records upon successful/unsuccessful attempts to use the "chacl" command by adding or updating the following rule in "/etc/audit/rules.d/audit.rules": +Satisfies: SRG-OS-000037-GPOS-00015, SRG-OS-000042-GPOS-00020, SRG-OS-000062-GPOS-00031, SRG-OS-000392-GPOS-00172, SRG-OS-000462-GPOS-00206, SRG-OS-000471-GPOS-00215, SRG-OS-000466-GPOS-00210</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000130CCI-000135CCI-000169CCI-000172CCI-002884Configure RHEL 9 to generate audit records upon successful/unsuccessful attempts to use the "chacl" command by adding or updating the following rule in "/etc/audit/rules.d/audit.rules": -a always,exit -F path=/usr/bin/chacl -F perm=x -F auid>=1000 -F auid!=unset -k perm_mod -The audit daemon must be restarted for the changes to take effect. +To load the rules to the kernel immediately, use the following command: -$ sudo service auditd restartVerify that RHEL 9 is configured to audit the execution of the "chacl" command with the following command: +$ sudo augenrules --loadVerify that RHEL 9 is configured to audit the execution of the "chacl" command with the following command: $ sudo auditctl -l | grep chacl --a always,exit -F path=/usr/bin/chacl -F perm=x -F auid>=1000 -F auid!=unset -k perm_mod +-a always,exit -S all -F path=/usr/bin/chacl -F perm=x -F auid>=1000 -F auid!=-1 -F key=perm_mod -If the command does not return a line, or the line is commented out, this is a finding.SRG-OS-000037-GPOS-00015<GroupDescription></GroupDescription>RHEL-09-654040RHEL 9 must audit all uses of the setfacl command.<VulnDiscussion>Without generating audit records specific to the security and mission needs of the organization, it would be difficult to establish, correlate, and investigate the events relating to an incident or identify those responsible for one. +If the command does not return a line, or the line is commented out, this is a finding.SRG-OS-000037-GPOS-00015<GroupDescription></GroupDescription>RHEL-09-654040RHEL 9 must audit all uses of the setfacl command.<VulnDiscussion>Without generating audit records specific to the security and mission needs of the organization, it would be difficult to establish, correlate, and investigate the events relating to an incident or identify those responsible for one. Audit records can be generated from various components within the information system (e.g., module or policy filter). @@ -5851,19 +5918,19 @@ When a user logs on, the auid is set to the uid of the account being authenticat The system call rules are loaded into a matching engine that intercepts each system call made by all programs on the system. Therefore, it is very important to use system call rules only when absolutely necessary since these affect performance. The more rules, the bigger the performance hit. The performance can be helped, however, by combining system calls into one rule whenever possible. -Satisfies: SRG-OS-000037-GPOS-00015, SRG-OS-000042-GPOS-00020, SRG-OS-000062-GPOS-00031, SRG-OS-000392-GPOS-00172, SRG-OS-000462-GPOS-00206, SRG-OS-000471-GPOS-00215</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000130CCI-000135CCI-000169CCI-000172CCI-002884Configure RHEL 9 to generate audit records upon successful/unsuccessful attempts to use the "setfacl" command by adding or updating the following rule in "/etc/audit/rules.d/audit.rules": +Satisfies: SRG-OS-000037-GPOS-00015, SRG-OS-000042-GPOS-00020, SRG-OS-000062-GPOS-00031, SRG-OS-000392-GPOS-00172, SRG-OS-000462-GPOS-00206, SRG-OS-000471-GPOS-00215</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000130CCI-000135CCI-000169CCI-000172CCI-002884Configure RHEL 9 to generate audit records upon successful/unsuccessful attempts to use the "setfacl" command by adding or updating the following rule in "/etc/audit/rules.d/audit.rules": -a always,exit -F path=/usr/bin/setfacl -F perm=x -F auid>=1000 -F auid!=unset -k perm_mod -The audit daemon must be restarted for the changes to take effect. +To load the rules to the kernel immediately, use the following command: -$ sudo service auditd restartVerify that RHEL 9 is configured to audit the execution of the "setfacl" command with the following command: +$ sudo augenrules --loadVerify that RHEL 9 is configured to audit the execution of the "setfacl" command with the following command: $ sudo auditctl -l | grep setfacl --a always,exit -F path=/usr/bin/setfacl -F perm=x -F auid>=1000 -F auid!=unset -k perm_mod +-a always,exit -S all -F path=/usr/bin/setfacl -F perm=x -F auid>=1000 -F auid!=-1 -F key=perm_mod -If the command does not return a line, or the line is commented out, this is a finding.SRG-OS-000037-GPOS-00015<GroupDescription></GroupDescription>RHEL-09-654045RHEL 9 must audit all uses of the chcon command.<VulnDiscussion>Without generating audit records that are specific to the security and mission needs of the organization, it would be difficult to establish, correlate, and investigate the events relating to an incident or identify those responsible for one. +If the command does not return a line, or the line is commented out, this is a finding.SRG-OS-000037-GPOS-00015<GroupDescription></GroupDescription>RHEL-09-654045RHEL 9 must audit all uses of the chcon command.<VulnDiscussion>Without generating audit records that are specific to the security and mission needs of the organization, it would be difficult to establish, correlate, and investigate the events relating to an incident or identify those responsible for one. Audit records can be generated from various components within the information system (e.g., module or policy filter). @@ -5871,19 +5938,19 @@ When a user logs on, the auid is set to the uid of the account that is being aut The system call rules are loaded into a matching engine that intercepts each system call made by all programs on the system. Therefore, it is very important to use system call rules only when absolutely necessary since these affect performance. The more rules, the bigger the performance hit. The performance can be helped, however, by combining system calls into one rule whenever possible. -Satisfies: SRG-OS-000037-GPOS-00015, SRG-OS-000042-GPOS-00020, SRG-OS-000062-GPOS-00031, SRG-OS-000392-GPOS-00172, SRG-OS-000462-GPOS-00206, SRG-OS-000468-GPOS-00212, SRG-OS-000471-GPOS-00215, SRG-OS-000463-GPOS-00207, SRG-OS-000465-GPOS-00209</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000130CCI-000135CCI-000169CCI-000172CCI-002884Configure RHEL 9 to generate audit records upon successful/unsuccessful attempts to use the "chcon" command by adding or updating the following rule in "/etc/audit/rules.d/audit.rules": +Satisfies: SRG-OS-000037-GPOS-00015, SRG-OS-000042-GPOS-00020, SRG-OS-000062-GPOS-00031, SRG-OS-000392-GPOS-00172, SRG-OS-000462-GPOS-00206, SRG-OS-000468-GPOS-00212, SRG-OS-000471-GPOS-00215, SRG-OS-000463-GPOS-00207, SRG-OS-000465-GPOS-00209</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000130CCI-000135CCI-000169CCI-000172CCI-002884Configure RHEL 9 to generate audit records upon successful/unsuccessful attempts to use the "chcon" command by adding or updating the following rule in "/etc/audit/rules.d/audit.rules": -a always,exit -F path=/usr/bin/chcon -F perm=x -F auid>=1000 -F auid!=unset -k perm_mod -The audit daemon must be restarted for the changes to take effect. +To load the rules to the kernel immediately, use the following command: -$ sudo service auditd restartVerify that RHEL 9 is configured to audit the execution of the "chcon" command with the following command: +$ sudo augenrules --loadVerify that RHEL 9 is configured to audit the execution of the "chcon" command with the following command: $ sudo auditctl -l | grep chcon --a always,exit -F path=/usr/bin/chcon -F perm=x -F auid>=1000 -F auid!=unset -k perm_mod +-a always,exit -S all -F path=/usr/bin/chcon -F perm=x -F auid>=1000 -F auid!=-1 -F key=perm_mod -If the command does not return a line, or the line is commented out, this is a finding.SRG-OS-000037-GPOS-00015<GroupDescription></GroupDescription>RHEL-09-654050RHEL 9 must audit all uses of the semanage command.<VulnDiscussion>Without generating audit records specific to the security and mission needs of the organization, it would be difficult to establish, correlate, and investigate the events relating to an incident or identify those responsible for one. +If the command does not return a line, or the line is commented out, this is a finding.SRG-OS-000037-GPOS-00015<GroupDescription></GroupDescription>RHEL-09-654050RHEL 9 must audit all uses of the semanage command.<VulnDiscussion>Without generating audit records specific to the security and mission needs of the organization, it would be difficult to establish, correlate, and investigate the events relating to an incident or identify those responsible for one. Audit records can be generated from various components within the information system (e.g., module or policy filter). @@ -5891,19 +5958,19 @@ When a user logs on, the auid is set to the uid of the account being authenticat The system call rules are loaded into a matching engine that intercepts each system call made by all programs on the system. Therefore, it is very important to use system call rules only when absolutely necessary since these affect performance. The more rules, the bigger the performance hit. The performance can be helped, however, by combining system calls into one rule whenever possible. -Satisfies: SRG-OS-000037-GPOS-00015, SRG-OS-000042-GPOS-00020, SRG-OS-000062-GPOS-00031, SRG-OS-000392-GPOS-00172, SRG-OS-000462-GPOS-00206, SRG-OS-000471-GPOS-00215, SRG-OS-000463-GPOS-00207, SRG-OS-000465-GPOS-00209</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000130CCI-000135CCI-000169CCI-000172CCI-002884Configure RHEL 9 to generate audit records upon successful/unsuccessful attempts to use the "semanage" command by adding or updating the following rule in "/etc/audit/rules.d/audit.rules": +Satisfies: SRG-OS-000037-GPOS-00015, SRG-OS-000042-GPOS-00020, SRG-OS-000062-GPOS-00031, SRG-OS-000392-GPOS-00172, SRG-OS-000462-GPOS-00206, SRG-OS-000471-GPOS-00215, SRG-OS-000463-GPOS-00207, SRG-OS-000465-GPOS-00209</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000130CCI-000135CCI-000169CCI-000172CCI-002884Configure RHEL 9 to generate audit records upon successful/unsuccessful attempts to use the "semanage" command by adding or updating the following rule in "/etc/audit/rules.d/audit.rules": -a always,exit -F path=/usr/sbin/semanage -F perm=x -F auid>=1000 -F auid!=unset -k privileged-unix-update -The audit daemon must be restarted for the changes to take effect. +To load the rules to the kernel immediately, use the following command: -$ sudo service auditd restartVerify that RHEL 9 is configured to audit the execution of the "semanage" command with the following command: +$ sudo augenrules --loadVerify that RHEL 9 is configured to audit the execution of the "semanage" command with the following command: $ sudo auditctl -l | grep semanage --a always,exit -F path=/usr/sbin/semanage -F perm=x -F auid>=1000 -F auid!=unset -k privileged-unix-update +-a always,exit -S all -F path=/usr/sbin/semanage -F perm=x -F auid>=1000 -F auid!=-1 -F key=privileged-unix-update -If the command does not return a line, or the line is commented out, this is a finding.SRG-OS-000037-GPOS-00015<GroupDescription></GroupDescription>RHEL-09-654055RHEL 9 must audit all uses of the setfiles command.<VulnDiscussion>Without generating audit records specific to the security and mission needs of the organization, it would be difficult to establish, correlate, and investigate the events relating to an incident or identify those responsible for one. +If the command does not return a line, or the line is commented out, this is a finding.SRG-OS-000037-GPOS-00015<GroupDescription></GroupDescription>RHEL-09-654055RHEL 9 must audit all uses of the setfiles command.<VulnDiscussion>Without generating audit records specific to the security and mission needs of the organization, it would be difficult to establish, correlate, and investigate the events relating to an incident or identify those responsible for one. Audit records can be generated from various components within the information system (e.g., module or policy filter). @@ -5911,19 +5978,19 @@ When a user logs on, the auid is set to the uid of the account being authenticat The system call rules are loaded into a matching engine that intercepts each system call made by all programs on the system. Therefore, it is very important to use system call rules only when absolutely necessary since these affect performance. The more rules, the bigger the performance hit. The performance can be helped, however, by combining system calls into one rule whenever possible. -Satisfies: SRG-OS-000037-GPOS-00015, SRG-OS-000042-GPOS-00020, SRG-OS-000062-GPOS-00031, SRG-OS-000392-GPOS-00172, SRG-OS-000462-GPOS-00206, SRG-OS-000471-GPOS-00215, SRG-OS-000463-GPOS-00207, SRG-OS-000465-GPOS-00209</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000130CCI-000135CCI-000169CCI-000172CCI-002884Configure RHEL 9 to generate audit records upon successful/unsuccessful attempts to use the "setfiles" command by adding or updating the following rule in "/etc/audit/rules.d/audit.rules": +Satisfies: SRG-OS-000037-GPOS-00015, SRG-OS-000042-GPOS-00020, SRG-OS-000062-GPOS-00031, SRG-OS-000392-GPOS-00172, SRG-OS-000462-GPOS-00206, SRG-OS-000471-GPOS-00215, SRG-OS-000463-GPOS-00207, SRG-OS-000465-GPOS-00209</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000130CCI-000135CCI-000169CCI-000172CCI-002884Configure RHEL 9 to generate audit records upon successful/unsuccessful attempts to use the "setfiles" command by adding or updating the following rule in "/etc/audit/rules.d/audit.rules": -a always,exit -F path=/usr/sbin/setfiles -F perm=x -F auid>=1000 -F auid!=unset -k privileged-unix-update -The audit daemon must be restarted for the changes to take effect. +To load the rules to the kernel immediately, use the following command: -$ sudo service auditd restartVerify that RHEL 9 is configured to audit the execution of the "setfiles" command with the following command: +$ sudo augenrules --loadVerify that RHEL 9 is configured to audit the execution of the "setfiles" command with the following command: $ sudo auditctl -l | grep setfiles --a always,exit -F path=/usr/sbin/setfiles -F perm=x -F auid>=1000 -F auid!=unset -k privileged-unix-update +-a always,exit -S all -F path=/usr/sbin/setfiles -F perm=x -F auid>=1000 -F auid!=-1 -F key=privileged-unix-update -If the command does not return a line, or the line is commented out, this is a finding.SRG-OS-000037-GPOS-00015<GroupDescription></GroupDescription>RHEL-09-654060RHEL 9 must audit all uses of the setsebool command.<VulnDiscussion>Without generating audit records specific to the security and mission needs of the organization, it would be difficult to establish, correlate, and investigate the events relating to an incident or identify those responsible for one. +If the command does not return a line, or the line is commented out, this is a finding.SRG-OS-000037-GPOS-00015<GroupDescription></GroupDescription>RHEL-09-654060RHEL 9 must audit all uses of the setsebool command.<VulnDiscussion>Without generating audit records specific to the security and mission needs of the organization, it would be difficult to establish, correlate, and investigate the events relating to an incident or identify those responsible for one. Audit records can be generated from various components within the information system (e.g., module or policy filter). @@ -5931,19 +5998,19 @@ When a user logs on, the auid is set to the uid of the account being authenticat The system call rules are loaded into a matching engine that intercepts each system call made by all programs on the system. Therefore, it is very important to use system call rules only when absolutely necessary since these affect performance. The more rules, the bigger the performance hit. The performance can be helped, however, by combining system calls into one rule whenever possible. -Satisfies: SRG-OS-000037-GPOS-00015, SRG-OS-000042-GPOS-00020, SRG-OS-000062-GPOS-00031, SRG-OS-000392-GPOS-00172, SRG-OS-000462-GPOS-00206, SRG-OS-000471-GPOS-00215, SRG-OS-000463-GPOS-00207, SRG-OS-000465-GPOS-00209</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000130CCI-000135CCI-000169CCI-000172CCI-002884Configure RHEL 9 to generate an audit event for any successful/unsuccessful use of the "setsebool " command by adding or updating the following rules in the "/etc/audit/rules.d/audit.rules" file: +Satisfies: SRG-OS-000037-GPOS-00015, SRG-OS-000042-GPOS-00020, SRG-OS-000062-GPOS-00031, SRG-OS-000392-GPOS-00172, SRG-OS-000462-GPOS-00206, SRG-OS-000471-GPOS-00215, SRG-OS-000463-GPOS-00207, SRG-OS-000465-GPOS-00209</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000130CCI-000135CCI-000169CCI-000172CCI-002884Configure RHEL 9 to generate an audit event for any successful/unsuccessful use of the "setsebool " command by adding or updating the following rules in the "/etc/audit/rules.d/audit.rules" file: -a always,exit -F path=/usr/sbin/setsebool -F perm=x -F auid>=1000 -F auid!=unset -F key=privileged -The audit daemon must be restarted for the changes to take effect. +To load the rules to the kernel immediately, use the following command: -$ sudo service auditd restartVerify that RHEL 9 is configured to audit the execution of the "setsebool" command with the following command: +$ sudo augenrules --loadVerify that RHEL 9 is configured to audit the execution of the "setsebool" command with the following command: $ sudo auditctl -l | grep setsebool - -a always,exit -F path=/usr/sbin/setsebool -F perm=x -F auid>=1000 -F auid!=unset -F key=privileged +-a always,exit -S all -F path=/usr/sbin/setsebool -F perm=x -F auid>=1000 -F auid!=-1 -F key=privileged -If the command does not return a line, or the line is commented out, this is a finding.SRG-OS-000037-GPOS-00015<GroupDescription></GroupDescription>RHEL-09-654065RHEL 9 must audit all uses of the rename, unlink, rmdir, renameat, and unlinkat system calls.<VulnDiscussion>Without generating audit records specific to the security and mission needs of the organization, it would be difficult to establish, correlate, and investigate the events relating to an incident or identify those responsible for one. +If the command does not return a line, or the line is commented out, this is a finding.SRG-OS-000037-GPOS-00015<GroupDescription></GroupDescription>RHEL-09-654065RHEL 9 must audit all uses of the rename, unlink, rmdir, renameat, and unlinkat system calls.<VulnDiscussion>Without generating audit records specific to the security and mission needs of the organization, it would be difficult to establish, correlate, and investigate the events relating to an incident or identify those responsible for one. Audit records can be generated from various components within the information system (e.g., module or policy filter). @@ -5951,21 +6018,21 @@ When a user logs on, the auid is set to the uid of the account being authenticat The system call rules are loaded into a matching engine that intercepts each system call made by all programs on the system. Therefore, it is very important to use system call rules only when absolutely necessary since these affect performance. The more rules, the bigger the performance hit. The performance can be helped, however, by combining system calls into one rule whenever possible. -Satisfies: SRG-OS-000037-GPOS-00015, SRG-OS-000042-GPOS-00020, SRG-OS-000062-GPOS-00031, SRG-OS-000392-GPOS-00172, SRG-OS-000462-GPOS-00206, SRG-OS-000471-GPOS-00215, SRG-OS-000466-GPOS-00210, SRG-OS-000467-GPOS-00211, SRG-OS-000468-GPOS-00212</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000130CCI-000135CCI-000169CCI-000172CCI-002884Configure RHEL 9 to generate an audit event for any successful/unsuccessful use of the "rename", "unlink", "rmdir", "renameat", and "unlinkat" system calls by adding or updating the following rules in the "/etc/audit/rules.d/audit.rules" file: +Satisfies: SRG-OS-000037-GPOS-00015, SRG-OS-000042-GPOS-00020, SRG-OS-000062-GPOS-00031, SRG-OS-000392-GPOS-00172, SRG-OS-000462-GPOS-00206, SRG-OS-000471-GPOS-00215, SRG-OS-000466-GPOS-00210, SRG-OS-000467-GPOS-00211, SRG-OS-000468-GPOS-00212</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000130CCI-000135CCI-000169CCI-000172CCI-002884Configure RHEL 9 to generate an audit event for any successful/unsuccessful use of the "rename", "unlink", "rmdir", "renameat", and "unlinkat" system calls by adding or updating the following rules in the "/etc/audit/rules.d/audit.rules" file: -a always,exit -F arch=b32 -S rename,unlink,rmdir,renameat,unlinkat -F auid>=1000 -F auid!=unset -k delete -a always,exit -F arch=b64 -S rename,unlink,rmdir,renameat,unlinkat -F auid>=1000 -F auid!=unset -k delete -The audit daemon must be restarted for the changes to take effect. +To load the rules to the kernel immediately, use the following command: -$ sudo service auditd restartVerify that RHEL 9 is configured to audit successful/unsuccessful attempts to use the "rename", "unlink", "rmdir", "renameat", and "unlinkat" system calls with the following command: +$ sudo augenrules --loadVerify that RHEL 9 is configured to audit successful/unsuccessful attempts to use the "rename", "unlink", "rmdir", "renameat", and "unlinkat" system calls with the following command: $ sudo auditctl -l | grep 'rename\|unlink\|rmdir' --a always,exit -F arch=b32 -S rename,unlink,rmdir,renameat,unlinkat -F auid>=1000 -F auid!=unset -k delete --a always,exit -F arch=b64 -S rename,unlink,rmdir,renameat,unlinkat -F auid>=1000 -F auid!=unset -k delete +-a always,exit -F arch=b32 -S unlink,rename,rmdir,unlinkat,renameat -F auid>=1000 -F auid!=-1 -F key=delete +-a always,exit -F arch=b64 -S rename,rmdir,unlink,unlinkat,renameat -F auid>=1000 -F auid!=-1 -F key=delete -If the command does not return an audit rule for "rename", "unlink", "rmdir", "renameat", and "unlinkat" or any of the lines returned are commented out, this is a finding.SRG-OS-000037-GPOS-00015<GroupDescription></GroupDescription>RHEL-09-654070RHEL 9 must audit all uses of the truncate, ftruncate, creat, open, openat, and open_by_handle_at system calls.<VulnDiscussion>Without generating audit records specific to the security and mission needs of the organization, it would be difficult to establish, correlate, and investigate the events relating to an incident or identify those responsible for one. +If the command does not return an audit rule for "rename", "unlink", "rmdir", "renameat", and "unlinkat" or any of the lines returned are commented out, this is a finding.SRG-OS-000037-GPOS-00015<GroupDescription></GroupDescription>RHEL-09-654070RHEL 9 must audit all uses of the truncate, ftruncate, creat, open, openat, and open_by_handle_at system calls.<VulnDiscussion>Without generating audit records specific to the security and mission needs of the organization, it would be difficult to establish, correlate, and investigate the events relating to an incident or identify those responsible for one. Audit records can be generated from various components within the information system (e.g., module or policy filter). @@ -5973,7 +6040,7 @@ When a user logs on, the auid is set to the uid of the account being authenticat The system call rules are loaded into a matching engine that intercepts each system call made by all programs on the system. Therefore, it is very important to use system call rules only when absolutely necessary since these affect performance. The more rules, the bigger the performance hit. The performance can be helped, however, by combining system calls into one rule whenever possible. -Satisfies: SRG-OS-000037-GPOS-00015, SRG-OS-000042-GPOS-00020, SRG-OS-000062-GPOS-00031, SRG-OS-000392-GPOS-00172, SRG-OS-000462-GPOS-00206, SRG-OS-000471-GPOS-00215, SRG-OS-000064-GPOS-00033, SRG-OS-000458-GPOS-00203, SRG-OS-000461-GPOS-00205</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000130CCI-000135CCI-000169CCI-000172CCI-002884Configure RHEL 9 to generate an audit event for any successful/unsuccessful use of the "truncate", "ftruncate", "creat", "open", "openat", and "open_by_handle_at" system calls by adding or updating the following rules in the "/etc/audit/rules.d/audit.rules" file: +Satisfies: SRG-OS-000037-GPOS-00015, SRG-OS-000042-GPOS-00020, SRG-OS-000062-GPOS-00031, SRG-OS-000392-GPOS-00172, SRG-OS-000462-GPOS-00206, SRG-OS-000471-GPOS-00215, SRG-OS-000064-GPOS-00033, SRG-OS-000458-GPOS-00203, SRG-OS-000461-GPOS-00205</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000130CCI-000135CCI-000169CCI-000172CCI-002884Configure RHEL 9 to generate an audit event for any successful/unsuccessful use of the "truncate", "ftruncate", "creat", "open", "openat", and "open_by_handle_at" system calls by adding or updating the following rules in the "/etc/audit/rules.d/audit.rules" file: -a always,exit -F arch=b32 -S truncate,ftruncate,creat,open,openat,open_by_handle_at -F exit=-EPERM -F auid>=1000 -F auid!=unset -k perm_access -a always,exit -F arch=b64 -S truncate,ftruncate,creat,open,openat,open_by_handle_at -F exit=-EPERM -F auid>=1000 -F auid!=unset -k perm_access @@ -5981,23 +6048,22 @@ Satisfies: SRG-OS-000037-GPOS-00015, SRG-OS-000042-GPOS-00020, SRG-OS-000062-GPO -a always,exit -F arch=b32 -S truncate,ftruncate,creat,open,openat,open_by_handle_at -F exit=-EACCES -F auid>=1000 -F auid!=unset -k perm_access -a always,exit -F arch=b64 -S truncate,ftruncate,creat,open,openat,open_by_handle_at -F exit=-EACCES -F auid>=1000 -F auid!=unset -k perm_access -The audit daemon must be restarted for the changes to take effect. - -$ sudo service auditd restartVerify that RHEL 9 is configured to audit successful/unsuccessful attempts to use the "truncate", "ftruncate", "creat", "open", "openat", and "open_by_handle_at" system calls with the following command: +To load the rules to the kernel immediately, use the following command: -$ sudo auditctl -l | grep 'open\|truncate\|creat' +$ sudo augenrules --loadVerify that RHEL 9 is configured to audit successful/unsuccessful attempts to use the "truncate", "ftruncate", "creat", "open", "openat", and "open_by_handle_at" system calls with the following command: --a always,exit -F arch=b32 -S truncate,ftruncate,creat,open,openat,open_by_handle_at -F exit=-EPERM -F auid>=1000 -F auid!=unset -k perm_access --a always,exit -F arch=b64 -S truncate,ftruncate,creat,open,openat,open_by_handle_at -F exit=-EPERM -F auid>=1000 -F auid!=unset -k perm_access +$ sudo auditctl -l | grep 'open\b\|openat\|open_by_handle_at\|truncate\|creat' --a always,exit -F arch=b32 -S truncate,ftruncate,creat,open,openat,open_by_handle_at -F exit=-EACCES -F auid>=1000 -F auid!=unset -k perm_access --a always,exit -F arch=b64 -S truncate,ftruncate,creat,open,openat,open_by_handle_at -F exit=-EACCES -F auid>=1000 -F auid!=unset -k perm_access +-a always,exit -F arch=b32 -S open,creat,truncate,ftruncate,openat,open_by_handle_at -F exit=-EPERM -F auid>=1000 -F auid!=-1 -F key=perm_access +-a always,exit -F arch=b64 -S open,truncate,ftruncate,creat,openat,open_by_handle_at -F exit=-EPERM -F auid>=1000 -F auid!=-1 -F key=perm_access +-a always,exit -F arch=b32 -S open,creat,truncate,ftruncate,openat,open_by_handle_at -F exit=-EACCES -F auid>=1000 -F auid!=-1 -F key=perm_access +-a always,exit -F arch=b64 -S open,truncate,ftruncate,creat,openat,open_by_handle_at -F exit=-EACCES -F auid>=1000 -F auid!=-1 -F key=perm_access If the output does not produce rules containing "-F exit=-EPERM", this is a finding. If the output does not produce rules containing "-F exit=-EACCES", this is a finding. -If the command does not return an audit rule for "truncate", "ftruncate", "creat", "open", "openat", and "open_by_handle_at" or any of the lines returned are commented out, this is a finding.SRG-OS-000037-GPOS-00015<GroupDescription></GroupDescription>RHEL-09-654075RHEL 9 must audit all uses of the delete_module system call.<VulnDiscussion>Without generating audit records specific to the security and mission needs of the organization, it would be difficult to establish, correlate, and investigate the events relating to an incident or identify those responsible for one. +If the command does not return an audit rule for "truncate", "ftruncate", "creat", "open", "openat", and "open_by_handle_at" or any of the lines returned are commented out, this is a finding.SRG-OS-000037-GPOS-00015<GroupDescription></GroupDescription>RHEL-09-654075RHEL 9 must audit all uses of the delete_module system call.<VulnDiscussion>Without generating audit records specific to the security and mission needs of the organization, it would be difficult to establish, correlate, and investigate the events relating to an incident or identify those responsible for one. Audit records can be generated from various components within the information system (e.g., module or policy filter). @@ -6005,21 +6071,21 @@ When a user logs on, the auid is set to the uid of the account being authenticat The system call rules are loaded into a matching engine that intercepts each system call made by all programs on the system. Therefore, it is very important to use system call rules only when absolutely necessary since these affect performance. The more rules, the bigger the performance hit. The performance can be helped, however, by combining system calls into one rule whenever possible. -Satisfies: SRG-OS-000037-GPOS-00015, SRG-OS-000042-GPOS-00020, SRG-OS-000062-GPOS-00031, SRG-OS-000392-GPOS-00172, SRG-OS-000462-GPOS-00206, SRG-OS-000471-GPOS-00215, SRG-OS-000471-GPOS-00216, SRG-OS-000477-GPOS-00222</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000130CCI-000135CCI-000169CCI-000172CCI-002884Configure RHEL 9 to generate an audit event for any successful/unsuccessful use of the "delete_module" system call by adding or updating the following rules in the "/etc/audit/rules.d/audit.rules" file: +Satisfies: SRG-OS-000037-GPOS-00015, SRG-OS-000042-GPOS-00020, SRG-OS-000062-GPOS-00031, SRG-OS-000392-GPOS-00172, SRG-OS-000462-GPOS-00206, SRG-OS-000471-GPOS-00215, SRG-OS-000471-GPOS-00216, SRG-OS-000477-GPOS-00222</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000130CCI-000135CCI-000169CCI-000172CCI-002884Configure RHEL 9 to generate an audit event for any successful/unsuccessful use of the "delete_module" system call by adding or updating the following rules in the "/etc/audit/rules.d/audit.rules" file: -a always,exit -F arch=b32 -S delete_module -F auid>=1000 -F auid!=unset -k module_chng -a always,exit -F arch=b64 -S delete_module -F auid>=1000 -F auid!=unset -k module_chng -The audit daemon must be restarted for the changes to take effect. +To load the rules to the kernel immediately, use the following command: -$ sudo service auditd restartVerify that RHEL 9 is configured to audit the execution of the "delete_module" system call with the following command: +$ sudo augenrules --loadVerify that RHEL 9 is configured to audit the execution of the "delete_module" system call with the following command: $ sudo auditctl -l | grep delete_module --a always,exit -F arch=b32 -S delete_module -F auid>=1000 -F auid!=unset -k module_chng --a always,exit -F arch=b64 -S delete_module -F auid>=1000 -F auid!=unset -k module_chng +-a always,exit -F arch=b32 -S delete_module -F auid>=1000 -F auid!=-1 -F key=module_chng +-a always,exit -F arch=b64 -S delete_module -F auid>=1000 -F auid!=-1 -F key=module_chng -If both the "b32" and "b64" audit rules are not defined for the "delete_module" system call, or any of the lines returned are commented out, this is a finding.SRG-OS-000037-GPOS-00015<GroupDescription></GroupDescription>RHEL-09-654080RHEL 9 must audit all uses of the init_module and finit_module system calls.<VulnDiscussion>Without generating audit records specific to the security and mission needs of the organization, it would be difficult to establish, correlate, and investigate the events relating to an incident or identify those responsible for one. +If both the "b32" and "b64" audit rules are not defined for the "delete_module" system call, or any of the lines returned are commented out, this is a finding.SRG-OS-000037-GPOS-00015<GroupDescription></GroupDescription>RHEL-09-654080RHEL 9 must audit all uses of the init_module and finit_module system calls.<VulnDiscussion>Without generating audit records specific to the security and mission needs of the organization, it would be difficult to establish, correlate, and investigate the events relating to an incident or identify those responsible for one. Audit records can be generated from various components within the information system (e.g., module or policy filter). @@ -6027,21 +6093,21 @@ When a user logs on, the auid is set to the uid of the account being authenticat The system call rules are loaded into a matching engine that intercepts each system call made by all programs on the system. Therefore, it is very important to use system call rules only when absolutely necessary since these affect performance. The more rules, the bigger the performance hit. The performance can be helped, however, by combining system calls into one rule whenever possible. -Satisfies: SRG-OS-000037-GPOS-00015, SRG-OS-000042-GPOS-00020, SRG-OS-000062-GPOS-00031, SRG-OS-000392-GPOS-00172, SRG-OS-000462-GPOS-00206, SRG-OS-000471-GPOS-00215, SRG-OS-000471-GPOS-00216, SRG-OS-000477-GPOS-00222</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000130CCI-000135CCI-000169CCI-000172CCI-002884Configure RHEL 9 to generate an audit event for any successful/unsuccessful use of the "init_module" and "finit_module" system calls by adding or updating the following rules in the "/etc/audit/rules.d/audit.rules" file: +Satisfies: SRG-OS-000037-GPOS-00015, SRG-OS-000042-GPOS-00020, SRG-OS-000062-GPOS-00031, SRG-OS-000392-GPOS-00172, SRG-OS-000462-GPOS-00206, SRG-OS-000471-GPOS-00215, SRG-OS-000471-GPOS-00216, SRG-OS-000477-GPOS-00222</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000130CCI-000135CCI-000169CCI-000172CCI-002884Configure RHEL 9 to generate an audit event for any successful/unsuccessful use of the "init_module" and "finit_module" system calls by adding or updating the following rules in the "/etc/audit/rules.d/audit.rules" file: -a always,exit -F arch=b32 -S init_module,finit_module -F auid>=1000 -F auid!=unset -k module_chng -a always,exit -F arch=b64 -S init_module,finit_module -F auid>=1000 -F auid!=unset -k module_chng -The audit daemon must be restarted for the changes to take effect. +To load the rules to the kernel immediately, use the following command: -$ sudo service auditd restartVerify that RHEL 9 is configured to audit the execution of the "init_module" and "finit_module" system calls with the following command: +$ sudo augenrules --loadVerify that RHEL 9 is configured to audit the execution of the "init_module" and "finit_module" system calls with the following command: $ sudo auditctl -l | grep init_module --a always,exit -F arch=b32 -S init_module,finit_module -F auid>=1000 -F auid!=unset -k module_chng --a always,exit -F arch=b64 -S init_module,finit_module -F auid>=1000 -F auid!=unset -k module_chng +-a always,exit -F arch=b32 -S init_module,finit_module -F auid>=1000 -F auid!=-1 -F key=module_chng +-a always,exit -F arch=b64 -S init_module,finit_module -F auid>=1000 -F auid!=-1 -F key=module_chng -If both the "b32" and "b64" audit rules are not defined for the "delete_module" system call, or any of the lines returned are commented out, this is a finding.SRG-OS-000037-GPOS-00015<GroupDescription></GroupDescription>RHEL-09-654085RHEL 9 must audit all uses of the chage command.<VulnDiscussion>Without generating audit records specific to the security and mission needs of the organization, it would be difficult to establish, correlate, and investigate the events relating to an incident or identify those responsible for one. +If both the "b32" and "b64" audit rules are not defined for the "init_module" system call, or any of the lines returned are commented out, this is a finding.SRG-OS-000037-GPOS-00015<GroupDescription></GroupDescription>RHEL-09-654085RHEL 9 must audit all uses of the chage command.<VulnDiscussion>Without generating audit records specific to the security and mission needs of the organization, it would be difficult to establish, correlate, and investigate the events relating to an incident or identify those responsible for one. Audit records can be generated from various components within the information system (e.g., module or policy filter). @@ -6049,19 +6115,19 @@ When a user logs on, the auid is set to the uid of the account being authenticat The system call rules are loaded into a matching engine that intercepts each system call made by all programs on the system. Therefore, it is very important to use system call rules only when absolutely necessary since these affect performance. The more rules, the bigger the performance hit. The performance can be helped, however, by combining system calls into one rule whenever possible. -Satisfies: SRG-OS-000037-GPOS-00015, SRG-OS-000042-GPOS-00020, SRG-OS-000062-GPOS-00031, SRG-OS-000392-GPOS-00172, SRG-OS-000462-GPOS-00206, SRG-OS-000468-GPOS-00212, SRG-OS-000471-GPOS-00215</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000130CCI-000135CCI-000169CCI-000172CCI-002884Configure RHEL 9 to generate audit records upon successful/unsuccessful attempts to use the "chage" command by adding or updating the following rule in "/etc/audit/rules.d/audit.rules": +Satisfies: SRG-OS-000037-GPOS-00015, SRG-OS-000042-GPOS-00020, SRG-OS-000062-GPOS-00031, SRG-OS-000392-GPOS-00172, SRG-OS-000462-GPOS-00206, SRG-OS-000468-GPOS-00212, SRG-OS-000471-GPOS-00215</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000130CCI-000135CCI-000169CCI-000172CCI-002884Configure RHEL 9 to generate audit records upon successful/unsuccessful attempts to use the "chage" command by adding or updating the following rule in "/etc/audit/rules.d/audit.rules": -a always,exit -F path=/usr/bin/chage -F perm=x -F auid>=1000 -F auid!=unset -k privileged-chage -The audit daemon must be restarted for the changes to take effect. +To load the rules to the kernel immediately, use the following command: -$ sudo service auditd restartVerify that RHEL 9 is configured to audit the execution of the "chage" command with the following command: +$ sudo augenrules --loadVerify that RHEL 9 is configured to audit the execution of the "chage" command with the following command: $ sudo auditctl -l | grep chage --a always,exit -F path=/usr/bin/chage -F perm=x -F auid>=1000 -F auid!=unset -k privileged-chage +-a always,exit -S all -F path=/usr/bin/chage -F perm=x -F auid>=1000 -F auid!=-1 -F key=privileged-chage -If the command does not return a line, or the line is commented out, this is a finding.SRG-OS-000037-GPOS-00015<GroupDescription></GroupDescription>RHEL-09-654090RHEL 9 must audit all uses of the chsh command.<VulnDiscussion>Without generating audit records specific to the security and mission needs of the organization, it would be difficult to establish, correlate, and investigate the events relating to an incident or identify those responsible for one. +If the command does not return a line, or the line is commented out, this is a finding.SRG-OS-000037-GPOS-00015<GroupDescription></GroupDescription>RHEL-09-654090RHEL 9 must audit all uses of the chsh command.<VulnDiscussion>Without generating audit records specific to the security and mission needs of the organization, it would be difficult to establish, correlate, and investigate the events relating to an incident or identify those responsible for one. Audit records can be generated from various components within the information system (e.g., module or policy filter). @@ -6069,19 +6135,19 @@ When a user logs on, the auid is set to the uid of the account being authenticat The system call rules are loaded into a matching engine that intercepts each system call made by all programs on the system. Therefore, it is very important to use system call rules only when absolutely necessary since these affect performance. The more rules, the bigger the performance hit. The performance can be helped, however, by combining system calls into one rule whenever possible. -Satisfies: SRG-OS-000037-GPOS-00015, SRG-OS-000042-GPOS-00020, SRG-OS-000062-GPOS-00031, SRG-OS-000392-GPOS-00172, SRG-OS-000462-GPOS-00206, SRG-OS-000471-GPOS-00215</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000130CCI-000135CCI-000169CCI-000172CCI-002884Configure RHEL 9 to generate audit records upon successful/unsuccessful attempts to use the "chsh" command by adding or updating the following rule in "/etc/audit/rules.d/audit.rules": +Satisfies: SRG-OS-000037-GPOS-00015, SRG-OS-000042-GPOS-00020, SRG-OS-000062-GPOS-00031, SRG-OS-000392-GPOS-00172, SRG-OS-000462-GPOS-00206, SRG-OS-000471-GPOS-00215</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000130CCI-000135CCI-000169CCI-000172CCI-002884Configure RHEL 9 to generate audit records upon successful/unsuccessful attempts to use the "chsh" command by adding or updating the following rule in "/etc/audit/rules.d/audit.rules": -a always,exit -F path=/usr/bin/chsh -F perm=x -F auid>=1000 -F auid!=unset -k priv_cmd -The audit daemon must be restarted for the changes to take effect. +To load the rules to the kernel immediately, use the following command: -$ sudo service auditd restartVerify that RHEL 9 is configured to audit the execution of the "chsh" command with the following command: +$ sudo augenrules --loadVerify that RHEL 9 is configured to audit the execution of the "chsh" command with the following command: $ sudo auditctl -l | grep chsh --a always,exit -F path=/usr/bin/chsh -F perm=x -F auid>=1000 -F auid!=unset -k priv_cmd +-a always,exit -S all -F path=/usr/bin/chsh -F perm=x -F auid>=1000 -F auid!=-1 -F key=priv_cmd -If the command does not return a line, or the line is commented out, this is a finding.SRG-OS-000037-GPOS-00015<GroupDescription></GroupDescription>RHEL-09-654095RHEL 9 must audit all uses of the crontab command.<VulnDiscussion>Without generating audit records specific to the security and mission needs of the organization, it would be difficult to establish, correlate, and investigate the events relating to an incident or identify those responsible for one. +If the command does not return a line, or the line is commented out, this is a finding.SRG-OS-000037-GPOS-00015<GroupDescription></GroupDescription>RHEL-09-654095RHEL 9 must audit all uses of the crontab command.<VulnDiscussion>Without generating audit records specific to the security and mission needs of the organization, it would be difficult to establish, correlate, and investigate the events relating to an incident or identify those responsible for one. Audit records can be generated from various components within the information system (e.g., module or policy filter). @@ -6089,19 +6155,19 @@ When a user logs on, the auid is set to the uid of the account being authenticat The system call rules are loaded into a matching engine that intercepts each system call made by all programs on the system. Therefore, it is very important to use system call rules only when absolutely necessary since these affect performance. The more rules, the bigger the performance hit. The performance can be helped, however, by combining system calls into one rule whenever possible. -Satisfies: SRG-OS-000037-GPOS-00015, SRG-OS-000042-GPOS-00020, SRG-OS-000062-GPOS-00031, SRG-OS-000392-GPOS-00172, SRG-OS-000462-GPOS-00206, SRG-OS-000471-GPOS-00215</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000130CCI-000135CCI-000169CCI-000172CCI-002884Configure RHEL 9 to generate audit records upon successful/unsuccessful attempts to use the "crontab" command by adding or updating the following rule in "/etc/audit/rules.d/audit.rules": +Satisfies: SRG-OS-000037-GPOS-00015, SRG-OS-000042-GPOS-00020, SRG-OS-000062-GPOS-00031, SRG-OS-000392-GPOS-00172, SRG-OS-000462-GPOS-00206, SRG-OS-000471-GPOS-00215</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000130CCI-000135CCI-000169CCI-000172CCI-002884Configure RHEL 9 to generate audit records upon successful/unsuccessful attempts to use the "crontab" command by adding or updating the following rule in "/etc/audit/rules.d/audit.rules": -a always,exit -F path=/usr/bin/crontab -F perm=x -F auid>=1000 -F auid!=unset -k privileged-crontab -The audit daemon must be restarted for the changes to take effect. +To load the rules to the kernel immediately, use the following command: -$ sudo service auditd restartVerify that RHEL 9 is configured to audit the execution of the "crontab" command with the following command: +$ sudo augenrules --loadVerify that RHEL 9 is configured to audit the execution of the "crontab" command with the following command: $ sudo auditctl -l | grep crontab --a always,exit -F path=/usr/bin/crontab -F perm=x -F auid>=1000 -F auid!=unset -k privileged-crontab +-a always,exit -S all -F path=/usr/bin/crontab -F perm=x -F auid>=1000 -F auid!=-1 -F key=privileged-crontab -If the command does not return a line, or the line is commented out, this is a finding.SRG-OS-000037-GPOS-00015<GroupDescription></GroupDescription>RHEL-09-654100RHEL 9 must audit all uses of the gpasswd command.<VulnDiscussion>Without generating audit records specific to the security and mission needs of the organization, it would be difficult to establish, correlate, and investigate the events relating to an incident or identify those responsible for one. +If the command does not return a line, or the line is commented out, this is a finding.SRG-OS-000037-GPOS-00015<GroupDescription></GroupDescription>RHEL-09-654100RHEL 9 must audit all uses of the gpasswd command.<VulnDiscussion>Without generating audit records specific to the security and mission needs of the organization, it would be difficult to establish, correlate, and investigate the events relating to an incident or identify those responsible for one. Audit records can be generated from various components within the information system (e.g., module or policy filter). @@ -6109,19 +6175,19 @@ When a user logs on, the auid is set to the uid of the account being authenticat The system call rules are loaded into a matching engine that intercepts each system call made by all programs on the system. Therefore, it is very important to use system call rules only when absolutely necessary since these affect performance. The more rules, the bigger the performance hit. The performance can be helped, however, by combining system calls into one rule whenever possible. -Satisfies: SRG-OS-000037-GPOS-00015, SRG-OS-000042-GPOS-00020, SRG-OS-000062-GPOS-00031, SRG-OS-000392-GPOS-00172, SRG-OS-000462-GPOS-00206, SRG-OS-000471-GPOS-00215</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000130CCI-000135CCI-000169CCI-000172CCI-002884Configure RHEL 9 to generate audit records upon successful/unsuccessful attempts to use the "gpasswd" command by adding or updating the following rule in "/etc/audit/rules.d/audit.rules": +Satisfies: SRG-OS-000037-GPOS-00015, SRG-OS-000042-GPOS-00020, SRG-OS-000062-GPOS-00031, SRG-OS-000392-GPOS-00172, SRG-OS-000462-GPOS-00206, SRG-OS-000471-GPOS-00215</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000130CCI-000135CCI-000169CCI-000172CCI-002884Configure RHEL 9 to generate audit records upon successful/unsuccessful attempts to use the "gpasswd" command by adding or updating the following rule in "/etc/audit/rules.d/audit.rules": -a always,exit -F path=/usr/bin/gpasswd -F perm=x -F auid>=1000 -F auid!=unset -k privileged-gpasswd -The audit daemon must be restarted for the changes to take effect. +To load the rules to the kernel immediately, use the following command: -$ sudo service auditd restartVerify that RHEL 9 is configured to audit the execution of the "gpasswd" command with the following command: +$ sudo augenrules --loadVerify that RHEL 9 is configured to audit the execution of the "gpasswd" command with the following command: $ sudo auditctl -l | grep gpasswd --a always,exit -F path=/usr/bin/gpasswd -F perm=x -F auid>=1000 -F auid!=unset -k privileged-gpasswd +-a always,exit -S all -F path=/usr/bin/gpasswd -F perm=x -F auid>=1000 -F auid!=-1 -F key=privileged-gpasswd -If the command does not return a line, or the line is commented out, this is a finding.SRG-OS-000037-GPOS-00015<GroupDescription></GroupDescription>RHEL-09-654105RHEL 9 must audit all uses of the kmod command.<VulnDiscussion>Without generating audit records that are specific to the security and mission needs of the organization, it would be difficult to establish, correlate, and investigate the events relating to an incident or identify those responsible for one. +If the command does not return a line, or the line is commented out, this is a finding.SRG-OS-000037-GPOS-00015<GroupDescription></GroupDescription>RHEL-09-654105RHEL 9 must audit all uses of the kmod command.<VulnDiscussion>Without generating audit records that are specific to the security and mission needs of the organization, it would be difficult to establish, correlate, and investigate the events relating to an incident or identify those responsible for one. Audit records can be generated from various components within the information system (e.g., module or policy filter). @@ -6129,19 +6195,19 @@ When a user logs on, the auid is set to the uid of the account being authenticat The system call rules are loaded into a matching engine that intercepts each system call made by all programs on the system. Therefore, it is very important to use system call rules only when absolutely necessary since these affect performance. The more rules, the bigger the performance hit. The performance can be helped, however, by combining system calls into one rule whenever possible. -Satisfies: SRG-OS-000037-GPOS-00015, SRG-OS-000042-GPOS-00020, SRG-OS-000062-GPOS-00031, SRG-OS-000392-GPOS-00172, SRG-OS-000462-GPOS-00206, SRG-OS-000471-GPOS-00215, SRG-OS-000471-GPOS-00216, SRG-OS-000477-GPOS-00222</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000130CCI-000135CCI-000169CCI-000172CCI-002884Configure RHEL 9 to generate audit records upon successful/unsuccessful attempts to use the "kmod" command by adding or updating the following rule in "/etc/audit/rules.d/audit.rules": +Satisfies: SRG-OS-000037-GPOS-00015, SRG-OS-000042-GPOS-00020, SRG-OS-000062-GPOS-00031, SRG-OS-000392-GPOS-00172, SRG-OS-000462-GPOS-00206, SRG-OS-000471-GPOS-00215, SRG-OS-000471-GPOS-00216, SRG-OS-000477-GPOS-00222</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000130CCI-000135CCI-000169CCI-000172CCI-002884Configure RHEL 9 to generate audit records upon successful/unsuccessful attempts to use the "kmod" command by adding or updating the following rule in "/etc/audit/rules.d/audit.rules": -a always,exit -F path=/usr/bin/kmod -F perm=x -F auid>=1000 -F auid!=unset -k modules -The audit daemon must be restarted for the changes to take effect. +To load the rules to the kernel immediately, use the following command: -$ sudo service auditd restartVerify that RHEL 9 is configured to audit the execution of the "kmod" command with the following command: +$ sudo augenrules --loadVerify that RHEL 9 is configured to audit the execution of the "kmod" command with the following command: $ sudo auditctl -l | grep kmod --a always,exit -F path=/usr/bin/kmod -F perm=x -F auid>=1000 -F auid!=unset -k modules +-a always,exit -S all -F path=/usr/bin/kmod -F perm=x -F auid>=1000 -F auid!=-1 -F key=modules -If the command does not return a line, or the line is commented out, this is a finding.SRG-OS-000037-GPOS-00015<GroupDescription></GroupDescription>RHEL-09-654110RHEL 9 must audit all uses of the newgrp command.<VulnDiscussion>Without generating audit records specific to the security and mission needs of the organization, it would be difficult to establish, correlate, and investigate the events relating to an incident or identify those responsible for one. +If the command does not return a line, or the line is commented out, this is a finding.SRG-OS-000037-GPOS-00015<GroupDescription></GroupDescription>RHEL-09-654110RHEL 9 must audit all uses of the newgrp command.<VulnDiscussion>Without generating audit records specific to the security and mission needs of the organization, it would be difficult to establish, correlate, and investigate the events relating to an incident or identify those responsible for one. Audit records can be generated from various components within the information system (e.g., module or policy filter). @@ -6149,19 +6215,19 @@ When a user logs on, the auid is set to the uid of the account that is being aut The system call rules are loaded into a matching engine that intercepts each system call made by all programs on the system. Therefore, it is very important to use system call rules only when absolutely necessary since these affect performance. The more rules, the bigger the performance hit. The performance can be helped, however, by combining system calls into one rule whenever possible. -Satisfies: SRG-OS-000037-GPOS-00015, SRG-OS-000042-GPOS-00020, SRG-OS-000062-GPOS-00031, SRG-OS-000392-GPOS-00172, SRG-OS-000462-GPOS-00206, SRG-OS-000471-GPOS-00215</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000130CCI-000135CCI-000169CCI-000172CCI-002884Configure RHEL 9 to generate audit records upon successful/unsuccessful attempts to use the "newgrp" command by adding or updating the following rule in "/etc/audit/rules.d/audit.rules": +Satisfies: SRG-OS-000037-GPOS-00015, SRG-OS-000042-GPOS-00020, SRG-OS-000062-GPOS-00031, SRG-OS-000392-GPOS-00172, SRG-OS-000462-GPOS-00206, SRG-OS-000471-GPOS-00215</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000130CCI-000135CCI-000169CCI-000172CCI-002884Configure RHEL 9 to generate audit records upon successful/unsuccessful attempts to use the "newgrp" command by adding or updating the following rule in "/etc/audit/rules.d/audit.rules": -a always,exit -F path=/usr/bin/newgrp -F perm=x -F auid>=1000 -F auid!=unset -k priv_cmd -The audit daemon must be restarted for the changes to take effect. +To load the rules to the kernel immediately, use the following command: -$ sudo service auditd restartVerify that RHEL 9 is configured to audit the execution of the "newgrp" command with the following command: +$ sudo augenrules --loadVerify that RHEL 9 is configured to audit the execution of the "newgrp" command with the following command: $ sudo auditctl -l | grep newgrp --a always,exit -F path=/usr/bin/newgrp -F perm=x -F auid>=1000 -F auid!=unset -k priv_cmd +-a always,exit -S all -F path=/usr/bin/newgrp -F perm=x -F auid>=1000 -F auid!=-1 -F key=priv_cmd -If the command does not return a line, or the line is commented out, this is a finding.SRG-OS-000037-GPOS-00015<GroupDescription></GroupDescription>RHEL-09-654115RHEL 9 must audit all uses of the pam_timestamp_check command.<VulnDiscussion>Without generating audit records specific to the security and mission needs of the organization, it would be difficult to establish, correlate, and investigate the events relating to an incident or identify those responsible for one. +If the command does not return a line, or the line is commented out, this is a finding.SRG-OS-000037-GPOS-00015<GroupDescription></GroupDescription>RHEL-09-654115RHEL 9 must audit all uses of the pam_timestamp_check command.<VulnDiscussion>Without generating audit records specific to the security and mission needs of the organization, it would be difficult to establish, correlate, and investigate the events relating to an incident or identify those responsible for one. Audit records can be generated from various components within the information system (e.g., module or policy filter). @@ -6169,19 +6235,19 @@ When a user logs on, the auid is set to the uid of the account being authenticat The system call rules are loaded into a matching engine that intercepts each system call made by all programs on the system. Therefore, it is very important to use system call rules only when absolutely necessary since these affect performance. The more rules, the bigger the performance hit. The performance can be helped, however, by combining system calls into one rule whenever possible. -Satisfies: SRG-OS-000037-GPOS-00015, SRG-OS-000042-GPOS-00020, SRG-OS-000062-GPOS-00031, SRG-OS-000392-GPOS-00172, SRG-OS-000462-GPOS-00206, SRG-OS-000471-GPOS-00215</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000130CCI-000135CCI-000169CCI-000172CCI-002884Configure RHEL 9 to generate audit records upon successful/unsuccessful attempts to use the "pam_timestamp_check" command by adding or updating the following rule in "/etc/audit/rules.d/audit.rules": +Satisfies: SRG-OS-000037-GPOS-00015, SRG-OS-000042-GPOS-00020, SRG-OS-000062-GPOS-00031, SRG-OS-000392-GPOS-00172, SRG-OS-000462-GPOS-00206, SRG-OS-000471-GPOS-00215</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000130CCI-000135CCI-000169CCI-000172CCI-002884Configure RHEL 9 to generate audit records upon successful/unsuccessful attempts to use the "pam_timestamp_check" command by adding or updating the following rule in "/etc/audit/rules.d/audit.rules": -a always,exit -F path=/usr/sbin/pam_timestamp_check -F perm=x -F auid>=1000 -F auid!=unset -k privileged-pam_timestamp_check -The audit daemon must be restarted for the changes to take effect. +To load the rules to the kernel immediately, use the following command: -$ sudo service auditd restartVerify that RHEL 9 is configured to audit the execution of the "pam_timestamp_check" command with the following command: +$ sudo augenrules --loadVerify that RHEL 9 is configured to audit the execution of the "pam_timestamp_check" command with the following command: $ sudo auditctl -l | grep timestamp --a always,exit -F path=/usr/sbin/pam_timestamp_check -F perm=x -F auid>=1000 -F auid!=unset -k privileged-pam_timestamp_check +-a always,exit -S all -F path=/usr/sbin/pam_timestamp_check -F perm=x -F auid>=1000 -F auid!=-1 -F key=privileged-pam_timestamp_check -If the command does not return a line, or the line is commented out, this is a finding.SRG-OS-000037-GPOS-00015<GroupDescription></GroupDescription>RHEL-09-654120RHEL 9 must audit all uses of the passwd command.<VulnDiscussion>Without generating audit records specific to the security and mission needs of the organization, it would be difficult to establish, correlate, and investigate the events relating to an incident or identify those responsible for one. +If the command does not return a line, or the line is commented out, this is a finding.SRG-OS-000037-GPOS-00015<GroupDescription></GroupDescription>RHEL-09-654120RHEL 9 must audit all uses of the passwd command.<VulnDiscussion>Without generating audit records specific to the security and mission needs of the organization, it would be difficult to establish, correlate, and investigate the events relating to an incident or identify those responsible for one. Audit records can be generated from various components within the information system (e.g., module or policy filter). @@ -6189,17 +6255,19 @@ When a user logs on, the auid is set to the uid of the account being authenticat The system call rules are loaded into a matching engine that intercepts each system call made by all programs on the system. Therefore, it is very important to use system call rules only when absolutely necessary since these affect performance. The more rules, the bigger the performance hit. The performance can be helped, however, by combining system calls into one rule whenever possible. -Satisfies: SRG-OS-000037-GPOS-00015, SRG-OS-000042-GPOS-00020, SRG-OS-000062-GPOS-00031, SRG-OS-000392-GPOS-00172, SRG-OS-000462-GPOS-00206, SRG-OS-000471-GPOS-00215</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000130CCI-000135CCI-000169CCI-000172CCI-002884Configure RHEL 9 to generate audit records upon successful/unsuccessful attempts to use the "passwd" command by adding or updating the following rule in "/etc/audit/rules.d/audit.rules": +Satisfies: SRG-OS-000037-GPOS-00015, SRG-OS-000042-GPOS-00020, SRG-OS-000062-GPOS-00031, SRG-OS-000392-GPOS-00172, SRG-OS-000462-GPOS-00206, SRG-OS-000471-GPOS-00215</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000130CCI-000135CCI-000169CCI-000172CCI-002884Configure RHEL 9 to generate audit records upon successful/unsuccessful attempts to use the "passwd" command by adding or updating the following rule in "/etc/audit/rules.d/audit.rules": -a always,exit -F path=/usr/bin/passwd -F perm=x -F auid>=1000 -F auid!=unset -k privileged-passwd -The audit daemon must be restarted for the changes to take effect.Verify RHEL 9 generates audit records for all account creations, modifications, disabling, and termination events that affect "/etc/gshadow" with the following command: +To load the rules to the kernel immediately, use the following command: + +$ sudo augenrules --loadVerify RHEL 9 generates audit records for all account creations, modifications, disabling, and termination events that affect "/etc/gshadow" with the following command: $ sudo auditctl -l | egrep '(/usr/bin/passwd)' --a always,exit -F path=/usr/bin/passwd -F perm=x -F auid>=1000 -F auid!=unset -k privileged-passwd +-a always,exit -S all -F path=/usr/bin/passwd -F perm=x -F auid>=1000 -F auid!=-1 -F key=privileged-passwd -If the command does not return a line, or the line is commented out, this is a finding.SRG-OS-000037-GPOS-00015<GroupDescription></GroupDescription>RHEL-09-654125RHEL 9 must audit all uses of the postdrop command.<VulnDiscussion>Without generating audit records specific to the security and mission needs of the organization, it would be difficult to establish, correlate, and investigate the events relating to an incident or identify those responsible for one. +If the command does not return a line, or the line is commented out, this is a finding.SRG-OS-000037-GPOS-00015<GroupDescription></GroupDescription>RHEL-09-654125RHEL 9 must audit all uses of the postdrop command.<VulnDiscussion>Without generating audit records specific to the security and mission needs of the organization, it would be difficult to establish, correlate, and investigate the events relating to an incident or identify those responsible for one. Audit records can be generated from various components within the information system (e.g., module or policy filter). @@ -6207,19 +6275,19 @@ When a user logs on, the auid is set to the uid of the account being authenticat The system call rules are loaded into a matching engine that intercepts each system call made by all programs on the system. Therefore, it is very important to use system call rules only when absolutely necessary since these affect performance. The more rules, the bigger the performance hit. The performance can be helped however, by combining system calls into one rule whenever possible. -Satisfies: SRG-OS-000037-GPOS-00015, SRG-OS-000042-GPOS-00020, SRG-OS-000062-GPOS-00031, SRG-OS-000392-GPOS-00172, SRG-OS-000462-GPOS-00206, SRG-OS-000471-GPOS-00215</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000130CCI-000135CCI-000169CCI-000172CCI-002884Configure RHEL 9 to generate audit records upon successful/unsuccessful attempts to use the "postdrop" command by adding or updating the following rule in "/etc/audit/rules.d/audit.rules": +Satisfies: SRG-OS-000037-GPOS-00015, SRG-OS-000042-GPOS-00020, SRG-OS-000062-GPOS-00031, SRG-OS-000392-GPOS-00172, SRG-OS-000462-GPOS-00206, SRG-OS-000471-GPOS-00215</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000130CCI-000135CCI-000169CCI-000172CCI-002884Configure RHEL 9 to generate audit records upon successful/unsuccessful attempts to use the "postdrop" command by adding or updating the following rule in "/etc/audit/rules.d/audit.rules": -a always,exit -F path=/usr/sbin/postdrop -F perm=x -F auid>=1000 -F auid!=unset -k privileged-unix-update -The audit daemon must be restarted for the changes to take effect. +To load the rules to the kernel immediately, use the following command: -$ sudo service auditd restartVerify that RHEL 9 is configured to audit the execution of the "postdrop" command with the following command: +$ sudo augenrules --loadVerify that RHEL 9 is configured to audit the execution of the "postdrop" command with the following command: $ sudo auditctl -l | grep postdrop --a always,exit -F path=/usr/sbin/postdrop -F perm=x -F auid>=1000 -F auid!=unset -k privileged-unix-update +-a always,exit -S all -F path=/usr/sbin/postdrop -F perm=x -F auid>=1000 -F auid!=-1 -F key=privileged-unix-update -If the command does not return a line, or the line is commented out, this is a finding.SRG-OS-000037-GPOS-00015<GroupDescription></GroupDescription>RHEL-09-654130RHEL 9 must audit all uses of the postqueue command.<VulnDiscussion>Without generating audit record specific to the security and mission needs of the organization, it would be difficult to establish, correlate, and investigate the events relating to an incident or identify those responsible for one. +If the command does not return a line, or the line is commented out, this is a finding.SRG-OS-000037-GPOS-00015<GroupDescription></GroupDescription>RHEL-09-654130RHEL 9 must audit all uses of the postqueue command.<VulnDiscussion>Without generating audit record specific to the security and mission needs of the organization, it would be difficult to establish, correlate, and investigate the events relating to an incident or identify those responsible for one. Audit records can be generated from various components within the information system (e.g., module or policy filter). @@ -6227,19 +6295,19 @@ When a user logs on, the auid is set to the uid of the account being authenticat The system call rules are loaded into a matching engine that intercepts each system call made by all programs on the system. Therefore, it is very important to use system call rules only when absolutely necessary since these affect performance. The more rules, the bigger the performance hit. The performance can be helped, however, by combining system calls into one rule whenever possible. -Satisfies: SRG-OS-000037-GPOS-00015, SRG-OS-000042-GPOS-00020, SRG-OS-000062-GPOS-00031, SRG-OS-000392-GPOS-00172, SRG-OS-000462-GPOS-00206, SRG-OS-000471-GPOS-00215</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000130CCI-000135CCI-000169CCI-000172CCI-002884Configure RHEL 9 to generate audit records upon successful/unsuccessful attempts to use the "postqueue" command by adding or updating the following rule in "/etc/audit/rules.d/audit.rules": +Satisfies: SRG-OS-000037-GPOS-00015, SRG-OS-000042-GPOS-00020, SRG-OS-000062-GPOS-00031, SRG-OS-000392-GPOS-00172, SRG-OS-000462-GPOS-00206, SRG-OS-000471-GPOS-00215</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000130CCI-000135CCI-000169CCI-000172CCI-002884Configure RHEL 9 to generate audit records upon successful/unsuccessful attempts to use the "postqueue" command by adding or updating the following rule in "/etc/audit/rules.d/audit.rules": -a always,exit -F path=/usr/sbin/postqueue -F perm=x -F auid>=1000 -F auid!=unset -k privileged-unix-update -The audit daemon must be restarted for the changes to take effect. +To load the rules to the kernel immediately, use the following command: -$ sudo service auditd restartVerify that RHEL 9 is configured to audit the execution of the "postqueue" command with the following command: +$ sudo augenrules --loadVerify that RHEL 9 is configured to audit the execution of the "postqueue" command with the following command: $ sudo auditctl -l | grep postqueue --a always,exit -F path=/usr/sbin/postqueue -F perm=x -F auid>=1000 -F auid!=unset -k privileged-unix-update +-a always,exit -S all -F path=/usr/sbin/postqueue -F perm=x -F auid>=1000 -F auid!=-1 -F key=privileged-unix-update -If the command does not return a line, or the line is commented out, this is a finding.SRG-OS-000037-GPOS-00015<GroupDescription></GroupDescription>RHEL-09-654135RHEL 9 must audit all uses of the ssh-agent command.<VulnDiscussion>Without generating audit record specific to the security and mission needs of the organization, it would be difficult to establish, correlate, and investigate the events relating to an incident or identify those responsible for one. +If the command does not return a line, or the line is commented out, this is a finding.SRG-OS-000037-GPOS-00015<GroupDescription></GroupDescription>RHEL-09-654135RHEL 9 must audit all uses of the ssh-agent command.<VulnDiscussion>Without generating audit record specific to the security and mission needs of the organization, it would be difficult to establish, correlate, and investigate the events relating to an incident or identify those responsible for one. Audit records can be generated from various components within the information system (e.g., module or policy filter). @@ -6247,19 +6315,19 @@ When a user logs on, the auid is set to the uid of the account being authenticat The system call rules are loaded into a matching engine that intercepts each system call made by all programs on the system. Therefore, it is very important to use system call rules only when absolutely necessary since these affect performance. The more rules, the bigger the performance hit. The performance can be helped, however, by combining system calls into one rule whenever possible. -Satisfies: SRG-OS-000037-GPOS-00015, SRG-OS-000042-GPOS-00020, SRG-OS-000062-GPOS-00031, SRG-OS-000392-GPOS-00172, SRG-OS-000462-GPOS-00206, SRG-OS-000471-GPOS-00215</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000130CCI-000135CCI-000169CCI-000172CCI-002884Configure RHEL 9 to generate audit records upon successful/unsuccessful attempts to use the "ssh-agent" command by adding or updating the following rule in "/etc/audit/rules.d/audit.rules": +Satisfies: SRG-OS-000037-GPOS-00015, SRG-OS-000042-GPOS-00020, SRG-OS-000062-GPOS-00031, SRG-OS-000392-GPOS-00172, SRG-OS-000462-GPOS-00206, SRG-OS-000471-GPOS-00215</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000130CCI-000135CCI-000169CCI-000172CCI-002884Configure RHEL 9 to generate audit records upon successful/unsuccessful attempts to use the "ssh-agent" command by adding or updating the following rule in "/etc/audit/rules.d/audit.rules": -a always,exit -F path=/usr/bin/ssh-agent -F perm=x -F auid>=1000 -F auid!=unset -k privileged-ssh -The audit daemon must be restarted for the changes to take effect. +To load the rules to the kernel immediately, use the following command: -$ sudo service auditd restartVerify that RHEL 9 is configured to audit the execution of the "ssh-agent" command with the following command: +$ sudo augenrules --loadVerify that RHEL 9 is configured to audit the execution of the "ssh-agent" command with the following command: $ sudo auditctl -l | grep ssh-agent --a always,exit -F path=/usr/bin/ssh-agent -F perm=x -F auid>=1000 -F auid!=unset -k privileged-ssh +-a always,exit -S all -F path=/usr/bin/ssh-agent -F perm=x -F auid>=1000 -F auid!=-1 -F key=privileged-ssh -If the command does not return a line, or the line is commented out, this is a finding.SRG-OS-000037-GPOS-00015<GroupDescription></GroupDescription>RHEL-09-654140RHEL 9 must audit all uses of the ssh-keysign command.<VulnDiscussion>Without generating audit record specific to the security and mission needs of the organization, it would be difficult to establish, correlate, and investigate the events relating to an incident or identify those responsible for one. +If the command does not return a line, or the line is commented out, this is a finding.SRG-OS-000037-GPOS-00015<GroupDescription></GroupDescription>RHEL-09-654140RHEL 9 must audit all uses of the ssh-keysign command.<VulnDiscussion>Without generating audit record specific to the security and mission needs of the organization, it would be difficult to establish, correlate, and investigate the events relating to an incident or identify those responsible for one. Audit records can be generated from various components within the information system (e.g., module or policy filter). @@ -6267,19 +6335,19 @@ When a user logs on, the auid is set to the uid of the account being authenticat The system call rules are loaded into a matching engine that intercepts each system call made by all programs on the system. Therefore, it is very important to use system call rules only when absolutely necessary since these affect performance. The more rules, the bigger the performance hit. The performance can be helped, however, by combining system calls into one rule whenever possible. -Satisfies: SRG-OS-000037-GPOS-00015, SRG-OS-000042-GPOS-00020, SRG-OS-000062-GPOS-00031, SRG-OS-000392-GPOS-00172, SRG-OS-000462-GPOS-00206, SRG-OS-000471-GPOS-00215</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000130CCI-000135CCI-000169CCI-000172CCI-002884Configure RHEL 9 to generate audit records upon successful/unsuccessful attempts to use the "ssh-keysign" command by adding or updating the following rule in "/etc/audit/rules.d/audit.rules": +Satisfies: SRG-OS-000037-GPOS-00015, SRG-OS-000042-GPOS-00020, SRG-OS-000062-GPOS-00031, SRG-OS-000392-GPOS-00172, SRG-OS-000462-GPOS-00206, SRG-OS-000471-GPOS-00215</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000130CCI-000135CCI-000169CCI-000172CCI-002884Configure RHEL 9 to generate audit records upon successful/unsuccessful attempts to use the "ssh-keysign" command by adding or updating the following rule in "/etc/audit/rules.d/audit.rules": -a always,exit -F path=/usr/libexec/openssh/ssh-keysign -F perm=x -F auid>=1000 -F auid!=unset -k privileged-ssh -The audit daemon must be restarted for the changes to take effect. +To load the rules to the kernel immediately, use the following command: -$ sudo service auditd restartVerify that RHEL 9 is configured to audit the execution of the "ssh-keysign" command with the following command: +$ sudo augenrules --loadVerify that RHEL 9 is configured to audit the execution of the "ssh-keysign" command with the following command: $ sudo auditctl -l | grep ssh-keysign --a always,exit -F path=/usr/libexec/openssh/ssh-keysign -F perm=x -F auid>=1000 -F auid!=unset -k privileged-ssh +-a always,exit -S all -F path=/usr/libexec/openssh/ssh-keysign -F perm=x -F auid>=1000 -F auid!=-1 -F key=privileged-ssh -If the command does not return a line, or the line is commented out, this is a finding.SRG-OS-000037-GPOS-00015<GroupDescription></GroupDescription>RHEL-09-654145RHEL 9 must audit all uses of the su command.<VulnDiscussion>Without generating audit record specific to the security and mission needs of the organization, it would be difficult to establish, correlate, and investigate the events relating to an incident or identify those responsible for one. +If the command does not return a line, or the line is commented out, this is a finding.SRG-OS-000037-GPOS-00015<GroupDescription></GroupDescription>RHEL-09-654145RHEL 9 must audit all uses of the su command.<VulnDiscussion>Without generating audit record specific to the security and mission needs of the organization, it would be difficult to establish, correlate, and investigate the events relating to an incident or identify those responsible for one. Audit records can be generated from various components within the information system (e.g., module or policy filter). @@ -6287,19 +6355,19 @@ When a user logs on, the auid is set to the uid of the account being authenticat The system call rules are loaded into a matching engine that intercepts each system call made by all programs on the system. Therefore, it is very important to use system call rules only when absolutely necessary since these affect performance. The more rules, the bigger the performance hit. The performance can be helped, however, by combining system calls into one rule whenever possible. -Satisfies: SRG-OS-000037-GPOS-00015, SRG-OS-000042-GPOS-00020, SRG-OS-000062-GPOS-00031, SRG-OS-000064-GPOS-00033, SRG-OS-000392-GPOS-00172, SRG-OS-000462-GPOS-00206, SRG-OS-000471-GPOS-00215, SRG-OS-000466-GPOS-00210</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000130CCI-000135CCI-000169CCI-000172CCI-002884Configure RHEL 9 to generate audit records upon successful/unsuccessful attempts to use the "su" command by adding or updating the following rule in "/etc/audit/rules.d/audit.rules": +Satisfies: SRG-OS-000037-GPOS-00015, SRG-OS-000042-GPOS-00020, SRG-OS-000062-GPOS-00031, SRG-OS-000064-GPOS-00033, SRG-OS-000392-GPOS-00172, SRG-OS-000462-GPOS-00206, SRG-OS-000471-GPOS-00215, SRG-OS-000466-GPOS-00210</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000130CCI-000135CCI-000169CCI-000172CCI-002884Configure RHEL 9 to generate audit records upon successful/unsuccessful attempts to use the "su" command by adding or updating the following rule in "/etc/audit/rules.d/audit.rules": -a always,exit -F path=/usr/bin/su -F perm=x -F auid>=1000 -F auid!=unset -k privileged-priv_change -The audit daemon must be restarted for the changes to take effect. +To load the rules to the kernel immediately, use the following command: -$ sudo service auditd restartVerify that RHEL 9 is configured to audit the execution of the "su" command with the following command: +$ sudo augenrules --loadVerify that RHEL 9 is configured to audit the execution of the "su" command with the following command: -$ sudo auditctl -l | grep /usr/bin/su +$ sudo auditctl -l | grep '/usr/bin/su\b' --a always,exit -F path=/usr/bin/su -F perm=x -F auid>=1000 -F auid!=unset -k privileged-priv_change +-a always,exit -S all -F path=/usr/bin/su -F perm=x -F auid>=1000 -F auid!=-1 -F key=privileged-priv_change -If the command does not return a line, or the line is commented out, this is a finding.SRG-OS-000037-GPOS-00015<GroupDescription></GroupDescription>RHEL-09-654150RHEL 9 must audit all uses of the sudo command.<VulnDiscussion>Without generating audit record specific to the security and mission needs of the organization, it would be difficult to establish, correlate, and investigate the events relating to an incident or identify those responsible for one. +If the command does not return a line, or the line is commented out, this is a finding.SRG-OS-000037-GPOS-00015<GroupDescription></GroupDescription>RHEL-09-654150RHEL 9 must audit all uses of the sudo command.<VulnDiscussion>Without generating audit record specific to the security and mission needs of the organization, it would be difficult to establish, correlate, and investigate the events relating to an incident or identify those responsible for one. Audit records can be generated from various components within the information system (e.g., module or policy filter). @@ -6307,19 +6375,19 @@ When a user logs on, the auid is set to the uid of the account being authenticat The system call rules are loaded into a matching engine that intercepts each system call made by all programs on the system. Therefore, it is very important to use system call rules only when absolutely necessary since these affect performance. The more rules, the bigger the performance hit. The performance can be helped, however, by combining system calls into one rule whenever possible. -Satisfies: SRG-OS-000037-GPOS-00015, SRG-OS-000042-GPOS-00020, SRG-OS-000062-GPOS-00031, SRG-OS-000392-GPOS-00172, SRG-OS-000462-GPOS-00206, SRG-OS-000471-GPOS-00215, SRG-OS-000466-GPOS-00210</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000130CCI-000135CCI-000169CCI-000172CCI-002884Configure RHEL 9 to generate audit records upon successful/unsuccessful attempts to use the "sudo" command by adding or updating the following rule in "/etc/audit/rules.d/audit.rules": +Satisfies: SRG-OS-000037-GPOS-00015, SRG-OS-000042-GPOS-00020, SRG-OS-000062-GPOS-00031, SRG-OS-000392-GPOS-00172, SRG-OS-000462-GPOS-00206, SRG-OS-000471-GPOS-00215, SRG-OS-000466-GPOS-00210</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000130CCI-000135CCI-000169CCI-000172CCI-002884Configure RHEL 9 to generate audit records upon successful/unsuccessful attempts to use the "sudo" command by adding or updating the following rule in "/etc/audit/rules.d/audit.rules": -a always,exit -F path=/usr/bin/sudo -F perm=x -F auid>=1000 -F auid!=unset -k priv_cmd -The audit daemon must be restarted for the changes to take effect. +To load the rules to the kernel immediately, use the following command: -$ sudo service auditd restartVerify that RHEL 9 is configured to audit the execution of the "sudo" command with the following command: +$ sudo augenrules --loadVerify that RHEL 9 is configured to audit the execution of the "sudo" command with the following command: -$ sudo auditctl -l | grep /usr/bin/sudo +$ sudo auditctl -l | grep '/usr/bin/sudo\b' --a always,exit -F path=/usr/bin/sudo -F perm=x -F auid>=1000 -F auid!=unset -k priv_cmd +-a always,exit -S all -F path=/usr/bin/sudo -F perm=x -F auid>=1000 -F auid!=-1 -F key=priv_cmd -If the command does not return a line, or the line is commented out, this is a finding.SRG-OS-000037-GPOS-00015<GroupDescription></GroupDescription>RHEL-09-654155RHEL 9 must audit all uses of the sudoedit command.<VulnDiscussion>Without generating audit record specific to the security and mission needs of the organization, it would be difficult to establish, correlate, and investigate the events relating to an incident or identify those responsible for one. +If the command does not return a line, or the line is commented out, this is a finding.SRG-OS-000037-GPOS-00015<GroupDescription></GroupDescription>RHEL-09-654155RHEL 9 must audit all uses of the sudoedit command.<VulnDiscussion>Without generating audit record specific to the security and mission needs of the organization, it would be difficult to establish, correlate, and investigate the events relating to an incident or identify those responsible for one. Audit records can be generated from various components within the information system (e.g., module or policy filter). @@ -6327,19 +6395,19 @@ When a user logs on, the auid is set to the uid of the account being authenticat The system call rules are loaded into a matching engine that intercepts each system call made by all programs on the system. Therefore, it is very important to use system call rules only when absolutely necessary since these affect performance. The more rules, the bigger the performance hit. The performance can be helped, however, by combining system calls into one rule whenever possible. -Satisfies: SRG-OS-000037-GPOS-00015, SRG-OS-000042-GPOS-00020, SRG-OS-000062-GPOS-00031, SRG-OS-000392-GPOS-00172, SRG-OS-000462-GPOS-00206, SRG-OS-000471-GPOS-00215</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000130CCI-000135CCI-000169CCI-000172CCI-002884Configure RHEL 9 to generate audit records upon successful/unsuccessful attempts to use the "sudoedit" command by adding or updating the following rule in "/etc/audit/rules.d/audit.rules": +Satisfies: SRG-OS-000037-GPOS-00015, SRG-OS-000042-GPOS-00020, SRG-OS-000062-GPOS-00031, SRG-OS-000392-GPOS-00172, SRG-OS-000462-GPOS-00206, SRG-OS-000471-GPOS-00215</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000130CCI-000135CCI-000169CCI-000172CCI-002884Configure RHEL 9 to generate audit records upon successful/unsuccessful attempts to use the "sudoedit" command by adding or updating the following rule in "/etc/audit/rules.d/audit.rules": -a always,exit -F path=/usr/bin/sudoedit -F perm=x -F auid>=1000 -F auid!=unset -k priv_cmd -The audit daemon must be restarted for the changes to take effect. +To load the rules to the kernel immediately, use the following command: -$ sudo service auditd restartVerify that RHEL 9 is configured to audit the execution of the "sudoedit" command with the following command: +$ sudo augenrules --loadVerify that RHEL 9 is configured to audit the execution of the "sudoedit" command with the following command: $ sudo auditctl -l | grep /usr/bin/sudoedit --a always,exit -F path=/usr/bin/sudoedit -F perm=x -F auid>=1000 -F auid!=unset -k priv_cmd +-a always,exit -S all -F path=/usr/bin/sudoedit -F perm=x -F auid>=1000 -F auid!=-1 -F key=priv_cmd -If the command does not return a line, or the line is commented out, this is a finding.SRG-OS-000037-GPOS-00015<GroupDescription></GroupDescription>RHEL-09-654160RHEL 9 must audit all uses of the unix_chkpwd command.<VulnDiscussion>Without generating audit record specific to the security and mission needs of the organization, it would be difficult to establish, correlate, and investigate the events relating to an incident or identify those responsible for one. +If the command does not return a line, or the line is commented out, this is a finding.SRG-OS-000037-GPOS-00015<GroupDescription></GroupDescription>RHEL-09-654160RHEL 9 must audit all uses of the unix_chkpwd command.<VulnDiscussion>Without generating audit record specific to the security and mission needs of the organization, it would be difficult to establish, correlate, and investigate the events relating to an incident or identify those responsible for one. Audit records can be generated from various components within the information system (e.g., module or policy filter). @@ -6347,19 +6415,19 @@ When a user logs on, the auid is set to the uid of the account being authenticat The system call rules are loaded into a matching engine that intercepts each system call made by all programs on the system. Therefore, it is very important to use system call rules only when absolutely necessary since these affect performance. The more rules, the bigger the performance hit. The performance can be helped, however, by combining system calls into one rule whenever possible. -Satisfies: SRG-OS-000037-GPOS-00015, SRG-OS-000042-GPOS-00020, SRG-OS-000062-GPOS-00031, SRG-OS-000392-GPOS-00172, SRG-OS-000462-GPOS-00206, SRG-OS-000471-GPOS-00215</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000130CCI-000135CCI-000169CCI-000172CCI-002884Configure RHEL 9 to generate audit records upon successful/unsuccessful attempts to use the "unix_chkpwd" command by adding or updating the following rule in "/etc/audit/rules.d/audit.rules": +Satisfies: SRG-OS-000037-GPOS-00015, SRG-OS-000042-GPOS-00020, SRG-OS-000062-GPOS-00031, SRG-OS-000392-GPOS-00172, SRG-OS-000462-GPOS-00206, SRG-OS-000471-GPOS-00215</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000130CCI-000135CCI-000169CCI-000172CCI-002884Configure RHEL 9 to generate audit records upon successful/unsuccessful attempts to use the "unix_chkpwd" command by adding or updating the following rule in "/etc/audit/rules.d/audit.rules": -a always,exit -F path=/usr/sbin/unix_chkpwd -F perm=x -F auid>=1000 -F auid!=unset -k privileged-unix-update -The audit daemon must be restarted for the changes to take effect. +To load the rules to the kernel immediately, use the following command: -$ sudo service auditd restartVerify that RHEL 9 is configured to audit the execution of the "unix_chkpwd" command with the following command: +$ sudo augenrules --loadVerify that RHEL 9 is configured to audit the execution of the "unix_chkpwd" command with the following command: $ sudo auditctl -l | grep unix_chkpwd --a always,exit -F path=/usr/sbin/unix_chkpwd -F perm=x -F auid>=1000 -F auid!=unset -k privileged-unix-update +-a always,exit -S all -F path=/usr/sbin/unix_chkpwd -F perm=x -F auid>=1000 -F auid!=-1 -F key=privileged-unix-update -If the command does not return a line, or the line is commented out, this is a finding.SRG-OS-000037-GPOS-00015<GroupDescription></GroupDescription>RHEL-09-654165RHEL 9 must audit all uses of the unix_update command.<VulnDiscussion>Without generating audit record specific to the security and mission needs of the organization, it would be difficult to establish, correlate, and investigate the events relating to an incident or identify those responsible for one. +If the command does not return a line, or the line is commented out, this is a finding.SRG-OS-000037-GPOS-00015<GroupDescription></GroupDescription>RHEL-09-654165RHEL 9 must audit all uses of the unix_update command.<VulnDiscussion>Without generating audit record specific to the security and mission needs of the organization, it would be difficult to establish, correlate, and investigate the events relating to an incident or identify those responsible for one. Audit records can be generated from various components within the information system (e.g., module or policy filter). @@ -6367,19 +6435,19 @@ When a user logs on, the auid is set to the uid of the account being authenticat The system call rules are loaded into a matching engine that intercepts each system call made by all programs on the system. Therefore, it is very important to use system call rules only when absolutely necessary since these affect performance. The more rules, the bigger the performance hit. The performance can be helped, however, by combining system calls into one rule whenever possible. -Satisfies: SRG-OS-000037-GPOS-00015, SRG-OS-000042-GPOS-00020, SRG-OS-000062-GPOS-00031, SRG-OS-000064-GPOS-00033, SRG-OS-000392-GPOS-00172, SRG-OS-000462-GPOS-00206, SRG-OS-000471-GPOS-00215</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000130CCI-000135CCI-000169CCI-000172CCI-002884Configure RHEL 9 to generate audit records upon successful/unsuccessful attempts to use the "unix_update" command by adding or updating the following rule in "/etc/audit/rules.d/audit.rules": +Satisfies: SRG-OS-000037-GPOS-00015, SRG-OS-000042-GPOS-00020, SRG-OS-000062-GPOS-00031, SRG-OS-000064-GPOS-00033, SRG-OS-000392-GPOS-00172, SRG-OS-000462-GPOS-00206, SRG-OS-000471-GPOS-00215</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000130CCI-000135CCI-000169CCI-000172CCI-002884Configure RHEL 9 to generate audit records upon successful/unsuccessful attempts to use the "unix_update" command by adding or updating the following rule in "/etc/audit/rules.d/audit.rules": -a always,exit -F path=/usr/sbin/unix_update -F perm=x -F auid>=1000 -F auid!=unset -k privileged-unix-update -The audit daemon must be restarted for the changes to take effect. +To load the rules to the kernel immediately, use the following command: -$ sudo service auditd restartVerify that RHEL 9 is configured to audit the execution of the "unix_update" command with the following command: +$ sudo augenrules --loadVerify that RHEL 9 is configured to audit the execution of the "unix_update" command with the following command: $ sudo auditctl -l | grep unix_update --a always,exit -F path=/usr/sbin/unix_update -F perm=x -F auid>=1000 -F auid!=unset -k privileged-unix-update +-a always,exit -S all -F path=/usr/sbin/unix_update -F perm=x -F auid>=1000 -F auid!=-1 -F key=privileged-unix-update -If the command does not return a line, or the line is commented out, this is a finding.SRG-OS-000037-GPOS-00015<GroupDescription></GroupDescription>RHEL-09-654170RHEL 9 must audit all uses of the userhelper command.<VulnDiscussion>Without generating audit record specific to the security and mission needs of the organization, it would be difficult to establish, correlate, and investigate the events relating to an incident or identify those responsible for one. +If the command does not return a line, or the line is commented out, this is a finding.SRG-OS-000037-GPOS-00015<GroupDescription></GroupDescription>RHEL-09-654170RHEL 9 must audit all uses of the userhelper command.<VulnDiscussion>Without generating audit record specific to the security and mission needs of the organization, it would be difficult to establish, correlate, and investigate the events relating to an incident or identify those responsible for one. Audit records can be generated from various components within the information system (e.g., module or policy filter). @@ -6387,19 +6455,19 @@ When a user logs on, the auid is set to the uid of the account being authenticat The system call rules are loaded into a matching engine that intercepts each system call made by all programs on the system. Therefore, it is very important to use system call rules only when absolutely necessary since these affect performance. The more rules, the bigger the performance hit. The performance can be helped, however, by combining system calls into one rule whenever possible. -Satisfies: SRG-OS-000037-GPOS-00015, SRG-OS-000042-GPOS-00020, SRG-OS-000062-GPOS-00031, SRG-OS-000392-GPOS-00172, SRG-OS-000462-GPOS-00206, SRG-OS-000471-GPOS-00215</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000130CCI-000135CCI-000169CCI-000172CCI-002884Configure RHEL 9 to generate audit records upon successful/unsuccessful attempts to use the "userhelper" command by adding or updating the following rule in "/etc/audit/rules.d/audit.rules": +Satisfies: SRG-OS-000037-GPOS-00015, SRG-OS-000042-GPOS-00020, SRG-OS-000062-GPOS-00031, SRG-OS-000392-GPOS-00172, SRG-OS-000462-GPOS-00206, SRG-OS-000471-GPOS-00215</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000130CCI-000135CCI-000169CCI-000172CCI-002884Configure RHEL 9 to generate audit records upon successful/unsuccessful attempts to use the "userhelper" command by adding or updating the following rule in "/etc/audit/rules.d/audit.rules": -a always,exit -F path=/usr/sbin/userhelper -F perm=x -F auid>=1000 -F auid!=unset -k privileged-unix-update -The audit daemon must be restarted for the changes to take effect. +To load the rules to the kernel immediately, use the following command: -$ sudo service auditd restartVerify that RHEL 9 is configured to audit the execution of the "userhelper" command with the following command: +$ sudo augenrules --loadVerify that RHEL 9 is configured to audit the execution of the "userhelper" command with the following command: $ sudo auditctl -l | grep userhelper --a always,exit -F path=/usr/sbin/userhelper -F perm=x -F auid>=1000 -F auid!=unset -k privileged-unix-update +-a always,exit -S all -F path=/usr/sbin/userhelper -F perm=x -F auid>=1000 -F auid!=-1 -F key=privileged-unix-update -If the command does not return a line, or the line is commented out, this is a finding.SRG-OS-000037-GPOS-00015<GroupDescription></GroupDescription>RHEL-09-654175RHEL 9 must audit all uses of the usermod command.<VulnDiscussion>Without generating audit record specific to the security and mission needs of the organization, it would be difficult to establish, correlate, and investigate the events relating to an incident or identify those responsible for one. +If the command does not return a line, or the line is commented out, this is a finding.SRG-OS-000037-GPOS-00015<GroupDescription></GroupDescription>RHEL-09-654175RHEL 9 must audit all uses of the usermod command.<VulnDiscussion>Without generating audit record specific to the security and mission needs of the organization, it would be difficult to establish, correlate, and investigate the events relating to an incident or identify those responsible for one. Audit records can be generated from various components within the information system (e.g., module or policy filter). @@ -6407,19 +6475,19 @@ When a user logs on, the auid is set to the uid of the account being authenticat The system call rules are loaded into a matching engine that intercepts each system call made by all programs on the system. Therefore, it is very important to use system call rules only when absolutely necessary since these affect performance. The more rules, the bigger the performance hit. The performance can be helped, however, by combining system calls into one rule whenever possible. -Satisfies: SRG-OS-000037-GPOS-00015, SRG-OS-000042-GPOS-00020, SRG-OS-000062-GPOS-00031, SRG-OS-000392-GPOS-00172, SRG-OS-000462-GPOS-00206, SRG-OS-000471-GPOS-00215, SRG-OS-000466-GPOS-00210</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000130CCI-000135CCI-000169CCI-000172CCI-002884Configure RHEL 9 to generate audit records upon successful/unsuccessful attempts to use the "usermod " command by adding or updating the following rule in "/etc/audit/rules.d/audit.rules": +Satisfies: SRG-OS-000037-GPOS-00015, SRG-OS-000042-GPOS-00020, SRG-OS-000062-GPOS-00031, SRG-OS-000392-GPOS-00172, SRG-OS-000462-GPOS-00206, SRG-OS-000471-GPOS-00215, SRG-OS-000466-GPOS-00210</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000130CCI-000135CCI-000169CCI-000172CCI-002884Configure RHEL 9 to generate audit records upon successful/unsuccessful attempts to use the "usermod " command by adding or updating the following rule in "/etc/audit/rules.d/audit.rules": -a always,exit -F path=/usr/sbin/usermod -F perm=x -F auid>=1000 -F auid!=unset -k privileged-usermod -The audit daemon must be restarted for the changes to take effect. +To load the rules to the kernel immediately, use the following command: -$ sudo service auditd restartVerify that RHEL 9 is configured to audit the execution of the "usermod" command with the following command: +$ sudo augenrules --loadVerify that RHEL 9 is configured to audit the execution of the "usermod" command with the following command: $ sudo auditctl -l | grep usermod --a always,exit -F path=/usr/sbin/usermod -F perm=x -F auid>=1000 -F auid!=unset -k privileged-usermod +-a always,exit -S all -F path=/usr/sbin/usermod -F perm=x -F auid>=1000 -F auid!=-1 -F key=privileged-usermod -If the command does not return a line, or the line is commented out, this is a finding.SRG-OS-000037-GPOS-00015<GroupDescription></GroupDescription>RHEL-09-654180RHEL 9 must audit all uses of the mount command.<VulnDiscussion>Without generating audit records that are specific to the security and mission needs of the organization, it would be difficult to establish, correlate, and investigate the events relating to an incident or identify those responsible for one. +If the command does not return a line, or the line is commented out, this is a finding.SRG-OS-000037-GPOS-00015<GroupDescription></GroupDescription>RHEL-09-654180RHEL 9 must audit all uses of the mount command.<VulnDiscussion>Without generating audit records that are specific to the security and mission needs of the organization, it would be difficult to establish, correlate, and investigate the events relating to an incident or identify those responsible for one. Audit records can be generated from various components within the information system (e.g., module or policy filter). @@ -6427,124 +6495,127 @@ When a user logs on, the auid is set to the uid of the account that is being aut The system call rules are loaded into a matching engine that intercepts each system call made by all programs on the system. Therefore, it is very important to use system call rules only when absolutely necessary since these affect performance. The more rules, the bigger the performance hit. The performance can be helped, however, by combining system calls into one rule whenever possible. -Satisfies: SRG-OS-000037-GPOS-00015, SRG-OS-000042-GPOS-00020, SRG-OS-000062-GPOS-00031, SRG-OS-000392-GPOS-00172, SRG-OS-000462-GPOS-00206, SRG-OS-000471-GPOS-00215</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000130CCI-000135CCI-000169CCI-000172CCI-002884Configure RHEL 9 to generate audit records upon successful/unsuccessful attempts to use the "mount" command by adding or updating the following rule in "/etc/audit/rules.d/audit.rules": +Satisfies: SRG-OS-000037-GPOS-00015, SRG-OS-000042-GPOS-00020, SRG-OS-000062-GPOS-00031, SRG-OS-000392-GPOS-00172, SRG-OS-000462-GPOS-00206, SRG-OS-000471-GPOS-00215</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000130CCI-000135CCI-000169CCI-000172CCI-002884Configure RHEL 9 to generate audit records upon successful/unsuccessful attempts to use the "mount" command by adding or updating the following rule in "/etc/audit/rules.d/audit.rules": -a always,exit -F path=/usr/bin/mount -F perm=x -F auid>=1000 -F auid!=unset -k privileged-mount -The audit daemon must be restarted for the changes to take effect. +To load the rules to the kernel immediately, use the following command: -$ sudo service auditd restartVerify that RHEL 9 is configured to audit the execution of the "mount" command with the following command: +$ sudo augenrules --loadVerify that RHEL 9 is configured to audit the execution of the "mount" command with the following command: $ sudo auditctl -l | grep /usr/bin/mount --a always,exit -F path=/usr/bin/mount -F perm=x -F auid>=1000 -F auid!=unset -k privileged-mount +-a always,exit -S all -F path=/usr/bin/mount -F perm=x -F auid>=1000 -F auid!=-1 -F key=privileged-mount -If the command does not return a line, or the line is commented out, this is a finding.SRG-OS-000477-GPOS-00222<GroupDescription></GroupDescription>RHEL-09-654185Successful/unsuccessful uses of the init command in RHEL 9 must generate an audit record.<VulnDiscussion>Misuse of the init command may cause availability issues for the system.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000172Configure the audit system to generate an audit event for any successful/unsuccessful uses of the "init" command by adding or updating the following rule in the "/etc/audit/rules.d/audit.rules" file: +If the command does not return a line, or the line is commented out, this is a finding.SRG-OS-000477-GPOS-00222<GroupDescription></GroupDescription>RHEL-09-654185Successful/unsuccessful uses of the init command in RHEL 9 must generate an audit record.<VulnDiscussion>Misuse of the init command may cause availability issues for the system.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000172Configure the audit system to generate an audit event for any successful/unsuccessful uses of the "init" command by adding or updating the following rule in the "/etc/audit/rules.d/audit.rules" file: -a always,exit -F path=/usr/sbin/init -F perm=x -F auid>=1000 -F auid!=unset -k privileged-init -The audit daemon must be restarted for the changes to take effect. +To load the rules to the kernel immediately, use the following command: -$ sudo service auditd restartVerify that RHEL 9 is configured to audit the execution of the "init" command with the following command: +$ sudo augenrules --loadVerify that RHEL 9 is configured to audit the execution of the "init" command with the following command: -$ sudo auditctl -l | grep init +$ sudo auditctl -l | grep /usr/sbin/init --a always,exit -F path=/usr/sbin/init -F perm=x -F auid>=1000 -F auid!=unset -k privileged-init +-a always,exit -S all -F path=/usr/sbin/init -F perm=x -F auid>=1000 -F auid!=-1 -F key=privileged-init -If the command does not return a line, or the line is commented out, this is a finding.SRG-OS-000477-GPOS-00222<GroupDescription></GroupDescription>RHEL-09-654190Successful/unsuccessful uses of the poweroff command in RHEL 9 must generate an audit record.<VulnDiscussion>Misuse of the poweroff command may cause availability issues for the system.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000172Configure the audit system to generate an audit event for any successful/unsuccessful uses of the "poweroff" command by adding or updating the following rule in the "/etc/audit/rules.d/audit.rules" file: +If the command does not return a line, or the line is commented out, this is a finding.SRG-OS-000477-GPOS-00222<GroupDescription></GroupDescription>RHEL-09-654190Successful/unsuccessful uses of the poweroff command in RHEL 9 must generate an audit record.<VulnDiscussion>Misuse of the poweroff command may cause availability issues for the system.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000172Configure the audit system to generate an audit event for any successful/unsuccessful uses of the "poweroff" command by adding or updating the following rule in the "/etc/audit/rules.d/audit.rules" file: -a always,exit -F path=/usr/sbin/poweroff -F perm=x -F auid>=1000 -F auid!=unset -k privileged-poweroff -The audit daemon must be restarted for the changes to take effect. +To load the rules to the kernel immediately, use the following command: -$ sudo service auditd restartVerify that RHEL 9 is configured to audit the execution of the "poweroff" command with the following command: +$ sudo augenrules --loadVerify that RHEL 9 is configured to audit the execution of the "poweroff" command with the following command: $ sudo auditctl -l | grep poweroff --a always,exit -F path=/usr/sbin/poweroff -F perm=x -F auid>=1000 -F auid!=unset -k privileged-poweroff +-a always,exit -S all -F path=/usr/sbin/poweroff -F perm=x -F auid>=1000 -F auid!=-1 -F key=privileged-poweroff -If the command does not return a line, or the line is commented out, this is a finding.SRG-OS-000477-GPOS-00222<GroupDescription></GroupDescription>RHEL-09-654195Successful/unsuccessful uses of the reboot command in RHEL 9 must generate an audit record.<VulnDiscussion>Misuse of the reboot command may cause availability issues for the system.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000172Configure the audit system to generate an audit event for any successful/unsuccessful uses of the "reboot" command by adding or updating the following rule in the "/etc/audit/rules.d/audit.rules" file: +If the command does not return a line, or the line is commented out, this is a finding.SRG-OS-000477-GPOS-00222<GroupDescription></GroupDescription>RHEL-09-654195Successful/unsuccessful uses of the reboot command in RHEL 9 must generate an audit record.<VulnDiscussion>Misuse of the reboot command may cause availability issues for the system.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000172Configure the audit system to generate an audit event for any successful/unsuccessful uses of the "reboot" command by adding or updating the following rule in the "/etc/audit/rules.d/audit.rules" file: -a always,exit -F path=/usr/sbin/reboot -F perm=x -F auid>=1000 -F auid!=unset -k privileged-reboot -The audit daemon must be restarted for the changes to take effect. +To load the rules to the kernel immediately, use the following command: -$ sudo service auditd restartVerify that RHEL 9 is configured to audit the execution of the "reboot" command with the following command: +$ sudo augenrules --loadVerify that RHEL 9 is configured to audit the execution of the "reboot" command with the following command: $ sudo auditctl -l | grep reboot --a always,exit -F path=/usr/sbin/reboot -F perm=x -F auid>=1000 -F auid!=unset -k privileged-reboot +-a always,exit -S all -F path=/usr/sbin/reboot -F perm=x -F auid>=1000 -F auid!=-1 -F key=privileged-reboot -If the command does not return a line, or the line is commented out, this is a finding.SRG-OS-000477-GPOS-00222<GroupDescription></GroupDescription>RHEL-09-654200Successful/unsuccessful uses of the shutdown command in RHEL 9 must generate an audit record.<VulnDiscussion>Misuse of the shutdown command may cause availability issues for the system.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000172Configure the audit system to generate an audit event for any successful/unsuccessful uses of the "shutdown" command by adding or updating the following rule in the "/etc/audit/rules.d/audit.rules" file: +If the command does not return a line, or the line is commented out, this is a finding.SRG-OS-000477-GPOS-00222<GroupDescription></GroupDescription>RHEL-09-654200Successful/unsuccessful uses of the shutdown command in RHEL 9 must generate an audit record.<VulnDiscussion>Misuse of the shutdown command may cause availability issues for the system.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000172Configure the audit system to generate an audit event for any successful/unsuccessful uses of the "shutdown" command by adding or updating the following rule in the "/etc/audit/rules.d/audit.rules" file: -a always,exit -F path=/usr/sbin/shutdown -F perm=x -F auid>=1000 -F auid!=unset -k privileged-shutdown -The audit daemon must be restarted for the changes to take effect. +To load the rules to the kernel immediately, use the following command: -$ sudo service auditd restartVerify that RHEL 9 is configured to audit the execution of the "shutdown" command with the following command: - -$ sudo cat /etc/audit/rules.d/* | grep shutdown - --a always,exit -F path=/usr/sbin/shutdown -F perm=x -F auid>=1000 -F auid!=unset -k privileged-shutdown - -If the command does not return a line, or the line is commented out, this is a finding.SRG-OS-000037-GPOS-00015<GroupDescription></GroupDescription>RHEL-09-654205Successful/unsuccessful uses of the umount system call in RHEL 9 must generate an audit record.<VulnDiscussion>The changing of file permissions could indicate that a user is attempting to gain access to information that would otherwise be disallowed. Auditing DAC modifications can facilitate the identification of patterns of abuse among both authorized and unauthorized users. +$ sudo augenrules --loadVerify that RHEL 9 is configured to audit the execution of the "shutdown" command with the following command: + +$ sudo cat /etc/audit/rules.d/* | grep shutdown + +-a always,exit -S all -F path=/usr/sbin/shutdown -F perm=x -F auid>=1000 -F auid!=-1 -F key=privileged-shutdown + +If the command does not return a line, or the line is commented out, this is a finding.SRG-OS-000037-GPOS-00015<GroupDescription></GroupDescription>RHEL-09-654205Successful/unsuccessful uses of the umount system call in RHEL 9 must generate an audit record.<VulnDiscussion>The changing of file permissions could indicate that a user is attempting to gain access to information that would otherwise be disallowed. Auditing DAC modifications can facilitate the identification of patterns of abuse among both authorized and unauthorized users. -Satisfies: SRG-OS-000037-GPOS-00015, SRG-OS-000062-GPOS-00031, SRG-OS-000392-GPOS-00172, SRG-OS-000462-GPOS-00206, SRG-OS-000471-GPOS-00215</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000130CCI-000169CCI-000172CCI-002884Configure the audit system to generate an audit event for any successful/unsuccessful use of the "umount" system call by adding or updating the following rules in "/etc/audit/audit.rules" and adding the following rules to "/etc/audit/rules.d/perm_mod.rules" or updating the existing rules in files in the "/etc/audit/rules.d/" directory: +Satisfies: SRG-OS-000037-GPOS-00015, SRG-OS-000062-GPOS-00031, SRG-OS-000392-GPOS-00172, SRG-OS-000462-GPOS-00206, SRG-OS-000471-GPOS-00215</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000130CCI-000169CCI-000172CCI-002884Configure the audit system to generate an audit event for any successful/unsuccessful use of the "umount" system call by adding or updating the following rules in "/etc/audit/audit.rules" and adding the following rules to "/etc/audit/rules.d/perm_mod.rules" or updating the existing rules in files in the "/etc/audit/rules.d/" directory: -a always,exit -F arch=b32 -S umount -F auid>=1000 -F auid!=unset -k privileged-umount -The audit daemon must be restarted for the changes to take effect.Verify that RHEL 9 generates an audit record for all uses of the "umount" and system call with the following command: +To load the rules to the kernel immediately, use the following command: -$ sudo grep "umount" /etc/audit/audit.* +$ sudo augenrules --loadVerify that RHEL 9 generates an audit record for all uses of the "umount" and system call with the following command: -If the system is configured to audit this activity, it will return a line like the following: +$ sudo auditctl -l | grep b32 | grep 'umount\b' --a always,exit -F arch=b32 -S umount -F auid>=1000 -F auid!=unset -k privileged-umount +-a always,exit -F arch=b32 -S umount -F auid>=1000 -F auid!=-1 -F key=privileged-umount + +If the command does not return a line, or the line is commented out, this is a finding.SRG-OS-000037-GPOS-00015<GroupDescription></GroupDescription>RHEL-09-654210Successful/unsuccessful uses of the umount2 system call in RHEL 9 must generate an audit record.<VulnDiscussion>The changing of file permissions could indicate that a user is attempting to gain access to information that would otherwise be disallowed. Auditing DAC modifications can facilitate the identification of patterns of abuse among both authorized and unauthorized users. -If the command does not return a line, or the line is commented out, this is a finding.SRG-OS-000037-GPOS-00015<GroupDescription></GroupDescription>RHEL-09-654210Successful/unsuccessful uses of the umount2 system call in RHEL 9 must generate an audit record.<VulnDiscussion>The changing of file permissions could indicate that a user is attempting to gain access to information that would otherwise be disallowed. Auditing DAC modifications can facilitate the identification of patterns of abuse among both authorized and unauthorized users. +Satisfies: SRG-OS-000037-GPOS-00015, SRG-OS-000062-GPOS-00031, SRG-OS-000392-GPOS-00172, SRG-OS-000462-GPOS-00206, SRG-OS-000471-GPOS-00215</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000130CCI-000169CCI-000172CCI-002884Configure the audit system to generate an audit event for any successful/unsuccessful use of the "umount2" system call by adding or updating the following rules in a file in "/etc/audit/rules.d". -Satisfies: SRG-OS-000037-GPOS-00015, SRG-OS-000062-GPOS-00031, SRG-OS-000392-GPOS-00172, SRG-OS-000462-GPOS-00206, SRG-OS-000471-GPOS-00215</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000130CCI-000169CCI-000172CCI-002884Configure the audit system to generate an audit event for any successful/unsuccessful use of the "umount2" system call by adding or updating the following rules in "/etc/audit/audit.rules" and adding the following rules to "/etc/audit/rules.d/perm_mod.rules" or updating the existing rules in files in the "/etc/audit/rules.d/" directory: +-a always,exit -F arch=b32 -S umount2 -F auid>=1000 -F auid!=unset -k privileged-umount +-a always,exit -F arch=b64 -S umount2 -F auid>=1000 -F auid!=unset -k privileged-umount --a always,exit -F arch=b32 -S umount2 -F auid>=1000 -F auid!=unset -k perm_mod --a always,exit -F arch=b64 -S umount2 -F auid>=1000 -F auid!=unset -k perm_mod +To load the rules to the kernel immediately, use the following command: -The audit daemon must be restarted for the changes to take effect.To determine if the system is configured to audit calls to the umount2 system call, run the following command: +$ sudo augenrules --loadTo determine if the system is configured to audit calls to the umount2 system call, run the following command: -$ sudo grep "umount2" /etc/audit/audit.* +$ sudo auditctl -l | grep umount2 -If the system is configured to audit this activity, it will return a line. +-a always,exit -F arch=b64 -S umount2 -F auid>=1000 -F auid!=-1 -F key=privileged-umount +-a always,exit -F arch=b32 -S umount2 -F auid>=1000 -F auid!=-1 -F key=privileged-umount -If no line is returned, this is a finding.SRG-OS-000004-GPOS-00004<GroupDescription></GroupDescription>RHEL-09-654215RHEL 9 must generate audit records for all account creations, modifications, disabling, and termination events that affect /etc/sudoers.<VulnDiscussion>The actions taken by system administrators must be audited to keep a record of what was executed on the system, as well as for accountability purposes. Editing the sudoers file may be sign of an attacker trying to establish persistent methods to a system, auditing the editing of the sudoers files mitigates this risk. +If no line is returned, this is a finding.SRG-OS-000004-GPOS-00004<GroupDescription></GroupDescription>RHEL-09-654215RHEL 9 must generate audit records for all account creations, modifications, disabling, and termination events that affect /etc/sudoers.<VulnDiscussion>The actions taken by system administrators must be audited to keep a record of what was executed on the system, as well as for accountability purposes. Editing the sudoers file may be sign of an attacker trying to establish persistent methods to a system, auditing the editing of the sudoers files mitigates this risk. -Satisfies: SRG-OS-000004-GPOS-00004, SRG-OS-000037-GPOS-00015, SRG-OS-000042-GPOS-00020, SRG-OS-000062-GPOS-00031, SRG-OS-000304-GPOS-00121, SRG-OS-000392-GPOS-00172, SRG-OS-000462-GPOS-00206, SRG-OS-000470-GPOS-00214, SRG-OS-000471-GPOS-00215, SRG-OS-000239-GPOS-00089, SRG-OS-000240-GPOS-00090, SRG-OS-000241-GPOS-00091, SRG-OS-000303-GPOS-00120, SRG-OS-000466-GPOS-00210, SRG-OS-000476-GPOS-00221</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000018CCI-000130CCI-000135CCI-000169CCI-000172CCI-001403CCI-001404CCI-001405CCI-002130CCI-000015CCI-002884CCI-002132Configure RHEL 9 to generate audit records for all account creations, modifications, disabling, and termination events that affect "/etc/sudoers". +Satisfies: SRG-OS-000004-GPOS-00004, SRG-OS-000037-GPOS-00015, SRG-OS-000042-GPOS-00020, SRG-OS-000062-GPOS-00031, SRG-OS-000304-GPOS-00121, SRG-OS-000392-GPOS-00172, SRG-OS-000462-GPOS-00206, SRG-OS-000470-GPOS-00214, SRG-OS-000471-GPOS-00215, SRG-OS-000239-GPOS-00089, SRG-OS-000240-GPOS-00090, SRG-OS-000241-GPOS-00091, SRG-OS-000303-GPOS-00120, SRG-OS-000466-GPOS-00210, SRG-OS-000476-GPOS-00221</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000018CCI-000130CCI-000135CCI-000169CCI-000172CCI-001403CCI-001404CCI-001405CCI-002130CCI-000015CCI-002884CCI-002132Configure RHEL 9 to generate audit records for all account creations, modifications, disabling, and termination events that affect "/etc/sudoers". Add or update the following file system rule to "/etc/audit/rules.d/audit.rules": -w /etc/sudoers -p wa -k identity -The audit daemon must be restarted for the changes to take effect. +To load the rules to the kernel immediately, use the following command: -$ sudo service auditd restartVerify RHEL 9 generates audit records for all account creations, modifications, disabling, and termination events that affect "/etc/sudoers" with the following command: +$ sudo augenrules --loadVerify RHEL 9 generates audit records for all account creations, modifications, disabling, and termination events that affect "/etc/sudoers" with the following command: -$ sudo auditctl -l | grep /etc/sudoers +$ sudo auditctl -l | grep '/etc/sudoers[^.]' -w /etc/sudoers -p wa -k identity -If the command does not return a line, or the line is commented out, this is a finding.SRG-OS-000004-GPOS-00004<GroupDescription></GroupDescription>RHEL-09-654220RHEL 9 must generate audit records for all account creations, modifications, disabling, and termination events that affect /etc/sudoers.d/ directory.<VulnDiscussion>The actions taken by system administrators must be audited to keep a record of what was executed on the system, as well as for accountability purposes. Editing the sudoers file may be sign of an attacker trying to establish persistent methods to a system, auditing the editing of the sudoers files mitigates this risk. +If the command does not return a line, or the line is commented out, this is a finding.SRG-OS-000004-GPOS-00004<GroupDescription></GroupDescription>RHEL-09-654220RHEL 9 must generate audit records for all account creations, modifications, disabling, and termination events that affect /etc/sudoers.d/ directory.<VulnDiscussion>The actions taken by system administrators must be audited to keep a record of what was executed on the system, as well as for accountability purposes. Editing the sudoers file may be sign of an attacker trying to establish persistent methods to a system, auditing the editing of the sudoers files mitigates this risk. -Satisfies: SRG-OS-000004-GPOS-00004, SRG-OS-000037-GPOS-00015, SRG-OS-000042-GPOS-00020, SRG-OS-000062-GPOS-00031, SRG-OS-000304-GPOS-00121, SRG-OS-000392-GPOS-00172, SRG-OS-000462-GPOS-00206, SRG-OS-000470-GPOS-00214, SRG-OS-000471-GPOS-00215, SRG-OS-000239-GPOS-00089, SRG-OS-000240-GPOS-00090, SRG-OS-000241-GPOS-00091, SRG-OS-000303-GPOS-00120, SRG-OS-000466-GPOS-00210, SRG-OS-000476-GPOS-00221</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000018CCI-000130CCI-000135CCI-000169CCI-000172CCI-001403CCI-001404CCI-001405CCI-002130CCI-000015CCI-002884CCI-002132Configure RHEL 9 to generate audit records for all account creations, modifications, disabling, and termination events that affect "/etc/sudoers.d/". +Satisfies: SRG-OS-000004-GPOS-00004, SRG-OS-000037-GPOS-00015, SRG-OS-000042-GPOS-00020, SRG-OS-000062-GPOS-00031, SRG-OS-000304-GPOS-00121, SRG-OS-000392-GPOS-00172, SRG-OS-000462-GPOS-00206, SRG-OS-000470-GPOS-00214, SRG-OS-000471-GPOS-00215, SRG-OS-000239-GPOS-00089, SRG-OS-000240-GPOS-00090, SRG-OS-000241-GPOS-00091, SRG-OS-000303-GPOS-00120, SRG-OS-000466-GPOS-00210, SRG-OS-000476-GPOS-00221</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000018CCI-000130CCI-000135CCI-000169CCI-000172CCI-001403CCI-001404CCI-001405CCI-002130CCI-000015CCI-002884CCI-002132Configure RHEL 9 to generate audit records for all account creations, modifications, disabling, and termination events that affect "/etc/sudoers.d/". Add or update the following file system rule to "/etc/audit/rules.d/audit.rules": -w /etc/sudoers.d/ -p wa -k identity -The audit daemon must be restarted for the changes to take effect. +To load the rules to the kernel immediately, use the following command: -$ sudo service auditd restartVerify RHEL 9 generates audit records for all account creations, modifications, disabling, and termination events that affect "/etc/sudoers.d/" with the following command: +$ sudo augenrules --loadVerify RHEL 9 generates audit records for all account creations, modifications, disabling, and termination events that affect "/etc/sudoers.d/" with the following command: $ sudo auditctl -l | grep /etc/sudoers.d --w /etc/sudoers.d/ -p wa -k identity +-w /etc/sudoers.d -p wa -k actions If the command does not return a line, or the line is commented out, this is a finding.SRG-OS-000004-GPOS-00004<GroupDescription></GroupDescription>RHEL-09-654225RHEL 9 must generate audit records for all account creations, modifications, disabling, and termination events that affect /etc/group.<VulnDiscussion>In addition to auditing new user and group accounts, these watches will alert the system administrator(s) to any modifications. Any unexpected users, groups, or modifications must be investigated for legitimacy. @@ -6728,7 +6799,7 @@ $6$kcOnRq/5$NUEYPuyL.wghQwWssXRcLRFiiru7f5JPV6GaJhNC2aK5F3PZpE/BCCtwrxRc/AInKMNX Password hashes "!" or "*" indicate inactive accounts not available for logon and are not evaluated. -If any interactive user password hash does not begin with "$6", this is a finding.SRG-OS-000033-GPOS-00014<GroupDescription></GroupDescription>RHEL-09-671020RHEL 9 IP tunnels must use FIPS 140-2/140-3 approved cryptographic algorithms.<VulnDiscussion>Overriding the system crypto policy makes the behavior of the Libreswan service violate expectations, and makes system configuration more fragmented.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000068Configure Libreswan to use the system cryptographic policy. +If any interactive user password hash does not begin with "$6", this is a finding.SRG-OS-000033-GPOS-00014<GroupDescription></GroupDescription>RHEL-09-671020RHEL 9 IP tunnels must use FIPS 140-3 approved cryptographic algorithms.<VulnDiscussion>Overriding the system crypto policy makes the behavior of the Libreswan service violate expectations, and makes system configuration more fragmented.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000068Configure Libreswan to use the system cryptographic policy. Add the following line to "/etc/ipsec.conf": @@ -6756,123 +6827,146 @@ password sufficient pam_unix.so sha512 If "sha512" is missing, or the line is commented out, this is a finding. -If the system administrator (SA) can demonstrate that the required configuration is contained in a PAM configuration file included or substacked from the system-auth file, this is not a finding.SRG-OS-000396-GPOS-00176<GroupDescription></GroupDescription>RHEL-09-672010RHEL 9 must have the crypto-policies package installed.<VulnDiscussion>Centralized cryptographic policies simplify applying secure ciphers across an operating system and the applications that run on that operating system. Use of weak or untested encryption algorithms undermines the purposes of utilizing encryption to protect data. +If the system administrator (SA) can demonstrate that the required configuration is contained in a PAM configuration file included or substacked from the system-auth file, this is not a finding.SRG-OS-000396-GPOS-00176<GroupDescription></GroupDescription>RHEL-09-215100RHEL 9 must have the crypto-policies package installed.<VulnDiscussion>Centralized cryptographic policies simplify applying secure ciphers across an operating system and the applications that run on that operating system. Use of weak or untested encryption algorithms undermines the purposes of using encryption to protect data. -Satisfies: SRG-OS-000396-GPOS-00176, SRG-OS-000393-GPOS-00173, SRG-OS-000394-GPOS-00174</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-002450CCI-002890CCI-003123Install the crypto-policies package (if the package is not already installed) with the following command: +Satisfies: SRG-OS-000396-GPOS-00176, SRG-OS-000393-GPOS-00173, SRG-OS-000394-GPOS-00174</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-002450CCI-002890CCI-003123Install the crypto-policies package (if the package is not already installed) with the following command: -$ sudo dnf install crypto-policiesVerify that RHEL 9 crypto-policies package is installed with the following command: +$ sudo dnf -y install crypto-policiesVerify that the RHEL 9 crypto-policies package is installed with the following command: -$ sudo dnf list --installed crypto-policies +$ dnf list --installed crypto-policies Example output: -crypto-policies.noarch 20220223-1.git5203b41.el9_0.1 +crypto-policies.noarch 20240828-2.git626aa59.el9_5 -If the "crypto-policies" package is not installed, this is a finding.SRG-OS-000396-GPOS-00176<GroupDescription></GroupDescription>RHEL-09-672020RHEL 9 crypto policy must not be overridden.<VulnDiscussion>Centralized cryptographic policies simplify applying secure ciphers across an operating system and the applications that run on that operating system. Use of weak or untested encryption algorithms undermines the purposes of utilizing encryption to protect data. +If the crypto-policies package is not installed, this is a finding.SRG-OS-000396-GPOS-00176<GroupDescription></GroupDescription>RHEL-09-672020RHEL 9 cryptographic policy must not be overridden.<VulnDiscussion>Centralized cryptographic policies simplify applying secure ciphers across an operating system and the applications that run on that operating system. Use of weak or untested encryption algorithms undermines the purposes of using encryption to protect data. -Satisfies: SRG-OS-000396-GPOS-00176, SRG-OS-000393-GPOS-00173, SRG-OS-000394-GPOS-00174</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-002450CCI-002890CCI-003123Configure RHEL 9 to FIPS crypto policy. +Satisfies: SRG-OS-000396-GPOS-00176, SRG-OS-000393-GPOS-00173, SRG-OS-000394-GPOS-00174</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-002450CCI-002890CCI-003123Configure RHEL 9 to correctly implement the systemwide cryptographic policies by reinstalling the crypto-policies package contents. -$ sudo ln -s /usr/share/crypto-policies/FIPS/<service>.txt /etc/crypto-policies/back-ends/<service>.conf +Reinstall crypto-policies with the following command: -Replace <service> with every service that is not set to FIPS. +$ sudo dnf -y reinstall crypto-policies -The system must be rebooted to make the changes to take effect.Verify that RHEL 9 custom crypto policies are loaded correctly. +Set the crypto-policy to FIPS with the following command: -List all of the crypto backends configured on the system. +$ sudo update-crypto-policies --set FIPS -$ ls -l /etc/crypto-policies/back-ends/ -lrwxrwxrwx. 1 root root 40 Oct 7 08:44 bind.config -> /usr/share/crypto-policies/FIPS/bind.txt -lrwxrwxrwx. 1 root root 42 Oct 7 08:44 gnutls.config -> /usr/share/crypto-policies/FIPS/gnutls.txt -lrwxrwxrwx. 1 root root 40 Oct 7 08:44 java.config -> /usr/share/crypto-policies/FIPS/java.txt -lrwxrwxrwx. 1 root root 46 Oct 7 08:44 javasystem.config -> /usr/share/crypto-policies/FIPS/javasystem.txt -lrwxrwxrwx. 1 root root 40 Oct 7 08:44 krb5.config -> /usr/share/crypto-policies/FIPS/krb5.txt -lrwxrwxrwx. 1 root root 45 Oct 7 08:44 libreswan.config -> /usr/share/crypto-policies/FIPS/libreswan.txt -lrwxrwxrwx. 1 root root 42 Oct 7 08:44 libssh.config -> /usr/share/crypto-policies/FIPS/libssh.txt -lrwxrwxrwx. 1 root root 39 Oct 7 08:44 nss.config -> /usr/share/crypto-policies/FIPS/nss.txt -lrwxrwxrwx. 1 root root 43 Oct 7 08:44 openssh.config -> /usr/share/crypto-policies/FIPS/openssh.txt -lrwxrwxrwx. 1 root root 49 Oct 7 08:44 opensshserver.config -> /usr/share/crypto-policies/FIPS/opensshserver.txt -lrwxrwxrwx. 1 root root 46 Oct 7 08:44 opensslcnf.config -> /usr/share/crypto-policies/FIPS/opensslcnf.txt -lrwxrwxrwx. 1 root root 43 Oct 7 08:44 openssl.config -> /usr/share/crypto-policies/FIPS/openssl.txt - -If the paths do not point the respective files under /usr/share/crypto-policies/FIPS path, this is a finding.SRG-OS-000120-GPOS-00061<GroupDescription></GroupDescription>RHEL-09-672025RHEL 9 must use mechanisms meeting the requirements of applicable federal laws, executive orders, directives, policies, regulations, standards, and guidance for authentication to a cryptographic module.<VulnDiscussion>Overriding the system crypto policy makes the behavior of Kerberos violate expectations, and makes system configuration more fragmented.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000803Configure Kerberos to use system crypto policy. - -Create a symlink pointing to system crypto policy in the Kerberos configuration using the following command: +Setting system policy to FIPS -$ sudo ln -s /etc/crypto-policies/back-ends/krb5.config /usr/share/crypto-policies/FIPS/krb5.txtVerify that the symlink exists and targets the correct Kerberos crypto policy, with the following command: +Note: Systemwide crypto policies are applied on application startup. It is recommended to restart the system for the change of policies to fully take place.Verify that RHEL 9 cryptographic policies are not overridden. -file /etc/crypto-policies/back-ends/krb5.config +Verify that the configured policy matches the generated policy with the following command: -If command output shows the following line, Kerberos is configured to use the system-wide crypto policy: +$ sudo update-crypto-policies --check && echo PASS -/etc/crypto-policies/back-ends/krb5.config: symbolic link to /usr/share/crypto-policies/FIPS/krb5.txt - -If the symlink does not exist or points to a different target, this is a finding.SRG-OS-000250-GPOS-00093<GroupDescription></GroupDescription>RHEL-09-672030RHEL 9 must implement DOD-approved TLS encryption in the GnuTLS package.<VulnDiscussion>Without cryptographic integrity protections, information can be altered by unauthorized users without detection. +The configured policy matches the generated policy +PASS -Transport Layer Security (TLS) encryption is a required security setting as a number of known vulnerabilities have been reported against Secure Sockets Layer (SSL) and earlier versions of TLS. Encryption of private information is essential to ensuring data confidentiality. If private information is not encrypted, it can be intercepted and easily read by an unauthorized party. SQL Server must use a minimum of FIPS 140-3 approved TLS version 1.2, and all non-FIPS-approved SSL and TLS versions must be disabled. NIST 800-53 specifies the preferred configurations for government systems. +If the last line is not "PASS", this is a finding. -Cryptographic mechanisms used for protecting the integrity of information include, for example, signed hash functions using asymmetric cryptography enabling distribution of the public key to verify the hash information while maintaining the confidentiality of the secret key used to generate the hash. +List all of the crypto backends configured on the system with the following command: -Satisfies: SRG-OS-000250-GPOS-00093, SRG-OS-000423-GPOS-00187</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-001453CCI-002418Configure the RHEL 9 GnuTLS library to use only NIST-approved encryption with the following steps to enable FIPS mode: +$ ls -l /etc/crypto-policies/back-ends/ -$ sudo fips-mode-setup --enable +lrwxrwxrwx. 1 root root 40 Nov 13 16:29 bind.config -> /usr/share/crypto-policies/FIPS/bind.txt +lrwxrwxrwx. 1 root root 42 Nov 13 16:29 gnutls.config -> /usr/share/crypto-policies/FIPS/gnutls.txt +lrwxrwxrwx. 1 root root 40 Nov 13 16:29 java.config -> /usr/share/crypto-policies/FIPS/java.txt +lrwxrwxrwx. 1 root root 46 Nov 13 16:29 javasystem.config -> /usr/share/crypto-policies/FIPS/javasystem.txt +lrwxrwxrwx. 1 root root 40 Nov 13 16:29 krb5.config -> /usr/share/crypto-policies/FIPS/krb5.txt +lrwxrwxrwx. 1 root root 45 Nov 13 16:29 libreswan.config -> /usr/share/crypto-policies/FIPS/libreswan.txt +lrwxrwxrwx. 1 root root 42 Nov 13 16:29 libssh.config -> /usr/share/crypto-policies/FIPS/libssh.txt +-rw-r--r--. 1 root root 398 Nov 13 16:29 nss.config +lrwxrwxrwx. 1 root root 43 Nov 13 16:29 openssh.config -> /usr/share/crypto-policies/FIPS/openssh.txt +lrwxrwxrwx. 1 root root 49 Nov 13 16:29 opensshserver.config -> /usr/share/crypto-policies/FIPS/opensshserver.txt +lrwxrwxrwx. 1 root root 46 Nov 13 16:29 opensslcnf.config -> /usr/share/crypto-policies/FIPS/opensslcnf.txt +lrwxrwxrwx. 1 root root 43 Nov 13 16:29 openssl.config -> /usr/share/crypto-policies/FIPS/openssl.txt +lrwxrwxrwx. 1 root root 48 Nov 13 16:29 openssl_fips.config -> /usr/share/crypto-policies/FIPS/openssl_fips.txt + +If the paths do not point to the respective files under /usr/share/crypto-policies/FIPS path, this is a finding. +Note: nss.config should not be hyperlinked.SRG-OS-000120-GPOS-00061<GroupDescription></GroupDescription>RHEL-09-672025RHEL 9 must use mechanisms meeting the requirements of applicable federal laws, executive orders, directives, policies, regulations, standards, and guidance for authentication to a cryptographic module.<VulnDiscussion>Overriding the system crypto policy makes the behavior of Kerberos violate expectations and makes system configuration more fragmented.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000803Configure Kerberos to use system cryptographic policy. -A reboot is required for the changes to take effect.Verify if GnuTLS uses defined DOD-approved TLS Crypto Policy with the following command: +Create a symlink pointing to system crypto policy in the Kerberos configuration using the following command: - $ update-crypto-policies --show -FIPS +$ sudo ln -s /etc/crypto-policies/back-ends/krb5.config /usr/share/crypto-policies/FIPS/krb5.txtVerify that the symlink exists and targets the correct Kerberos cryptographic policy with the following command: -If the system wide crypto policy is not set to "FIPS", this is a finding.SRG-OS-000250-GPOS-00093<GroupDescription></GroupDescription>RHEL-09-672035RHEL 9 must implement DOD-approved encryption in the OpenSSL package.<VulnDiscussion>Without cryptographic integrity protections, information can be altered by unauthorized users without detection. +$ file /etc/crypto-policies/back-ends/krb5.config -Remote access (e.g., RDP) is access to DOD nonpublic information systems by an authorized user (or an information system) communicating through an external, nonorganization-controlled network. Remote access methods include, for example, dial-up, broadband, and wireless. +If command output shows the following line, Kerberos is configured to use the systemwide crypto policy: -Cryptographic mechanisms used for protecting the integrity of information include, for example, signed hash functions using asymmetric cryptography enabling distribution of the public key to verify the hash information while maintaining the confidentiality of the secret key used to generate the hash. +/etc/crypto-policies/back-ends/krb5.config: symbolic link to /usr/share/crypto-policies/FIPS/krb5.txt -The employed algorithms can be viewed in the /etc/crypto-policies/back-ends/openssl.config file.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-001453Configure the RHEL 9 OpenSSL library to use the system cryptographic policy. +If the symlink does not exist or points to a different target, this is a finding.SRG-OS-000396-GPOS-00176<GroupDescription></GroupDescription>RHEL-09-215105RHEL 9 must implement a FIPS 140-3 compliant systemwide cryptographic policy.<VulnDiscussion>Centralized cryptographic policies simplify applying secure ciphers across an operating system and the applications that run on that operating system. Use of weak or untested encryption algorithms undermines the purposes of using encryption to protect data. -Edit the "/etc/pki/tls/openssl.cnf" and add or modify the following line: +Satisfies: SRG-OS-000396-GPOS-00176, SRG-OS-000393-GPOS-00173, SRG-OS-000394-GPOS-00174</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-002450CCI-002890CCI-003123Configure RHEL 9 to use a FIPS 140-3 compliant systemwide cryptographic policy. + +Create subpolicies for enhancements to the systemwide crypto-policy with the following commands: + +Create or edit the SCOPES-AND-WILDCARDS policy module in a text editor and insert options that modify the systemwide cryptographic policy as follows: +$ sudo vi /etc/crypto-policies/policies/modules/SCOPES-AND-WILDCARDS.pmod + +Add the following lines to the policy: +# Disable CHACHA20-POLY1305 for the TLS protocol (OpenSSL, GnuTLS, NSS, and OpenJDK) +cipher@TLS = -CHACHA20-POLY1305 + +# Disable all CBC mode ciphers for the SSH protocol (libssh and OpenSSH) +cipher@SSH = -*-CBC + +Create or edit the OPENSSH-SUBPOLICY module in a text editor and insert options that modify the systemwide crypto-policy as follows: +$ sudo vi /etc/crypto-policies/policies/modules/OPENSSH-SUBPOLICY.pmod + +Add the following lines to the policy: +# Define ciphers for OpenSSH +cipher@SSH=AES-256-GCM AES-128-GCM AES-256-CTR AES-128-CTR + +# Define MACs for OpenSSH +mac@SSH=HMAC-SHA2-512 HMAC-SHA2-256 + +Create or edit the REQUIRE.pmod file and add the following lines to include the subpolicies in the FIPS configuration with the following command: -.include = /etc/crypto-policies/back-ends/opensslcnf.configVerify that RHEL 9 OpenSSL library is configured to use only ciphers employing FIPS 140-3 approved algorithms with the following command: +$ sudo vi /etc/crypto-policies/policies/modules/REQUIRE.pmod + +Add the following lines to REQUIRE.pmod: +@OPENSSH-SUBPOLICY +@SCOPES-AND-WILDCARDS + +Apply the policy enhancements to the FIPS systemwide cryptographic policy level with the following command: + +$ sudo update-crypto-policies --set FIPS -$ sudo grep -i opensslcnf.config /etc/pki/tls/openssl.cnf +Note: If additional subpolicies are being employed, they should be added to the REQUIRE.pmod as well. REQUIRE.pmod is included in the systemwide crypto-policy when it is set. + +To make the cryptographic settings effective for already running services and applications, restart the system: +$ sudo rebootVerify that RHEL 9 is set to use a FIPS 140-3 compliant systemwide cryptographic policy. -.include = /etc/crypto-policies/back-ends/opensslcnf.config +$ update-crypto-policies --show -If the "opensslcnf.config" is not defined in the "/etc/pki/tls/openssl.cnf" file, this is a finding.SRG-OS-000250-GPOS-00093<GroupDescription></GroupDescription>RHEL-09-672040RHEL 9 must implement DOD-approved TLS encryption in the OpenSSL package.<VulnDiscussion>Without cryptographic integrity protections, information can be altered by unauthorized users without detection. +FIPS + +If the systemwide crypto policy is not set to "FIPS", this is a finding. -Remote access (e.g., RDP) is access to DOD nonpublic information systems by an authorized user (or an information system) communicating through an external, nonorganization-controlled network. Remote access methods include, for example, dial-up, broadband, and wireless. +Inspect the contents of the REQUIRE.pmod file (if it exists) to ensure that only authorized modifications to the current policy are included with the following command: -Cryptographic mechanisms used for protecting the integrity of information include, for example, signed hash functions using asymmetric cryptography enabling distribution of the public key to verify the hash information while maintaining the confidentiality of the secret key used to generate the hash. +$ cat /etc/crypto-policies/policies/modules/REQUIRE.pmod -The employed algorithms can be viewed in the /etc/crypto-policies/back-ends/openssl.config file.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-001453Configure the RHEL 9 OpenSSL library to use only DOD-approved TLS encryption by editing the following line in the "/etc/crypto-policies/back-ends/opensslcnf.config" file: +Note: If subpolicies have been configured, they could be listed in a colon-separated list starting with FIPS as follows FIPS:<SUBPOLICY-NAME>:<SUBPOLICY-NAME>. This is not a finding. -TLS.MinProtocol = TLSv1.2 -DTLS.MinProtocol = DTLSv1.2 +If the AD-SUPPORT subpolicy module is included (e.g., "FIPS:AD-SUPPORT"), and Active Directory support is not documented as an operational requirement with the information system security officer (ISSO), this is a finding. -A reboot is required for the changes to take effect.Verify that RHEL 9 OpenSSL library is configured to use TLS 1.2 encryption or stronger with following command: +If the NO-ENFORCE-EMS subpolicy module is included (e.g., "FIPS:NO-ENFORCE-EMS"), and not enforcing EMS is not documented as an operational requirement with the ISSO, this is a finding. -$ grep -i minprotocol /etc/crypto-policies/back-ends/opensslcnf.config +Verify the current minimum crypto-policy configuration with the following commands: + +$ grep -E 'rsa_size|hash' /etc/crypto-policies/state/CURRENT.pol +hash = SHA2-256 SHA2-384 SHA2-512 SHA2-224 SHA3-256 SHA3-384 SHA3-512 SHAKE-256 +min_rsa_size = 2048 + +If the "hash" values do not include at least the following FIPS 140-3 compliant algorithms "SHA2-256 SHA2-384 SHA2-512 SHA2-224 SHA3-256 SHA3-384 SHA3-512 SHAKE-256", this is a finding. -TLS.MinProtocol = TLSv1.2 -DTLS.MinProtocol = DTLSv1.2 +If there are algorithms that include "SHA1" or a hash value less than "256" this is a finding. -If the "TLS.MinProtocol" is set to anything older than "TLSv1.2" or the "DTLS.MinProtocol" is set to anything older than "DTLSv1.2", this is a finding.SRG-OS-000396-GPOS-00176<GroupDescription></GroupDescription>RHEL-09-672045RHEL 9 must implement a systemwide encryption policy.<VulnDiscussion>Centralized cryptographic policies simplify applying secure ciphers across an operating system and the applications that run on that operating system. Use of weak or untested encryption algorithms undermines the purposes of utilizing encryption to protect data. - -Satisfies: SRG-OS-000396-GPOS-00176, SRG-OS-000393-GPOS-00173, SRG-OS-000394-GPOS-00174</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-002450CCI-002890CCI-003123Configure the FIPS policy as the systemwide cryptographic policy by running the following command: - -$ sudo update-crypto-policies --set FIPS - -Reboot the system to ensure that all aspects of the change take effect.Show the configured systemwide cryptographic policy by running the following command: - -$ sudo update-crypto-policies --show -FIPS - -If the main policy name is not "FIPS", this is a finding. - -If the AD-SUPPORT subpolicy module is included (e.g., "FIPS:AD-SUPPORT"), and Active Directory support is not documented as an operational requirement with the information system security officer (ISSO), this is a finding. - -If the NO-ENFORCE-EMS subpolicy module is included (e.g., "FIPS:NO-ENFORCE-EMS"), and not enforcing EMS is not documented as an operational requirement with the ISSO, this is a finding. - -If any other subpolicy module is included, this is a finding.SRG-OS-000423-GPOS-00187<GroupDescription></GroupDescription>RHEL-09-672050RHEL 9 must implement DOD-approved encryption in the bind package.<VulnDiscussion>Without cryptographic integrity protections, information can be altered by unauthorized users without detection. +If the "min_rsa_size" is not set to a value of at least 2048, this is a finding. + +If these commands do not return any output, this is a finding.SRG-OS-000423-GPOS-00187<GroupDescription></GroupDescription>RHEL-09-672050RHEL 9 must implement DOD-approved encryption in the bind package.<VulnDiscussion>Without cryptographic integrity protections, information can be altered by unauthorized users without detection. Cryptographic mechanisms used for protecting the integrity of information include, for example, signed hash functions using asymmetric cryptography enabling distribution of the public key to verify the hash information while maintaining the confidentiality of the secret key used to generate the hash. @@ -6890,4 +6984,151 @@ $ sudo grep include /etc/named.conf include "/etc/crypto-policies/back-ends/bind.config";' -If BIND is installed and the BIND config file doesn't contain the include "/etc/crypto-policies/back-ends/bind.config" directive, or the line is commented out, this is a finding. \ No newline at end of file +If BIND is installed and the BIND config file doesn't contain the include "/etc/crypto-policies/back-ends/bind.config" directive, or the line is commented out, this is a finding.SRG-OS-000023-GPOS-00006<GroupDescription></GroupDescription>RHEL-09-171011RHEL 9 must display the Standard Mandatory DOD Notice and Consent Banner before granting local or remote access to the system via a graphical user logon.<VulnDiscussion>Display of a standardized and approved use notification before granting access to the operating system ensures privacy and security notification verbiage used is consistent with applicable federal laws, Executive Orders, directives, policies, regulations, standards, and guidance. + +System use notifications are required only for access via logon interfaces with human users and are not required when such human interfaces do not exist. + +The banner must be formatted in accordance with applicable DOD policy. Use the following verbiage for operating systems that can accommodate banners of 1300 characters: + +"You are accessing a U.S. Government (USG) Information System (IS) that is provided for USG-authorized use only. + +By using this IS (which includes any device attached to this IS), you consent to the following conditions: + +-The USG routinely intercepts and monitors communications on this IS for purposes including, but not limited to, penetration testing, COMSEC monitoring, network operations and defense, personnel misconduct (PM), law enforcement (LE), and counterintelligence (CI) investigations. + +-At any time, the USG may inspect and seize data stored on this IS. + +-Communications using, or data stored on, this IS are not private, are subject to routine monitoring, interception, and search, and may be disclosed or used for any USG-authorized purpose. + +-This IS includes security measures (e.g., authentication and access controls) to protect USG interests--not for your personal benefit or privacy. + +-Notwithstanding the above, using this IS does not constitute consent to PM, LE or CI investigative searching or monitoring of the content of privileged communications, or work product, related to personal representation or services by attorneys, psychotherapists, or clergy, and their assistants. Such communications and work product are private and confidential. See User Agreement for details." + +Satisfies: SRG-OS-000023-GPOS-00006, SRG-OS-000228-GPOS-00088</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000048Configure the operating system to display the Standard Mandatory DOD Notice and Consent Banner before granting access to the system. + +Add the following lines to the [org/gnome/login-screen] section of the "/etc/dconf/db/local.d/01-banner-message": + +banner-message-text='You are accessing a U.S. Government (USG) Information System (IS) that is provided for USG-authorized use only.\nBy using this IS (which includes any device attached to this IS), you consent to the following conditions:\n-The USG routinely intercepts and monitors communications on this IS for purposes including, but not limited to, penetration testing, COMSEC monitoring, network operations and defense, personnel misconduct (PM), law enforcement (LE), and counterintelligence (CI) investigations.\n-At any time, the USG may inspect and seize data stored on this IS.\n-Communications using, or data stored on, this IS are not private, are subject to routine monitoring, interception, and search, and may be disclosed or used for any USG-authorized purpose.\n-This IS includes security measures (e.g., authentication and access controls) to protect USG interests--not for your personal benefit or privacy.\n-Notwithstanding the above, using this IS does not constitute consent to PM, LE or CI investigative searching or monitoring of the content of privileged communications, or work product, related to personal representation or services by attorneys, psychotherapists, or clergy, and their assistants. Such communications and work product are private and confidential. See User Agreement for details. ' + +Note: The "\n " characters are for formatting only. They will not be displayed on the graphical interface. + +Run the following command to update the database: + +$ sudo dconf updateNote: This requirement assumes the use of the RHEL 9 default graphical user interface, Gnome Shell. If the system does not have any graphical user interface installed, this requirement is Not Applicable. + +Verify RHEL 9 displays the Standard Mandatory DOD Notice and Consent Banner before granting access to the operating system via a graphical user logon. + +Check that the operating system displays the exact Standard Mandatory DOD Notice and Consent Banner text with the command: + +$ gsettings get org.gnome.login-screen banner-message-text + +banner-message-text= +'You are accessing a U.S. Government (USG) Information System (IS) that is provided for USG-authorized use only.\nBy using this IS (which includes any device attached to this IS), you consent to the following conditions:\n-The USG routinely intercepts and monitors communications on this IS for purposes including, but not limited to, penetration testing, COMSEC monitoring, network operations and defense, personnel misconduct (PM), law enforcement (LE), and counterintelligence (CI) investigations.\n-At any time, the USG may inspect and seize data stored on this IS.\n-Communications using, or data stored on, this IS are not private, are subject to routine monitoring, interception, and search, and may be disclosed or used for any USG-authorized purpose.\n-This IS includes security measures (e.g., authentication and access controls) to protect USG interests--not for your personal benefit or privacy.\n-Notwithstanding the above, using this IS does not constitute consent to PM, LE or CI investigative searching or monitoring of the content of privileged communications, or work product, related to personal representation or services by attorneys, psychotherapists, or clergy, and their assistants. Such communications and work product are private and confidential. See User Agreement for details. ' + +Note: The "\n " characters are for formatting only. They will not be displayed on the graphical interface. + +If the banner does not match the Standard Mandatory DOD Notice and Consent Banner exactly, this is a finding.SRG-OS-000080-GPOS-00048<GroupDescription></GroupDescription>RHEL-09-232103RHEL 9 "/etc/audit/" must be owned by root.<VulnDiscussion>The "/etc/audit/" directory contains files that ensure the proper auditing of command execution, privilege escalation, file manipulation, and more. Protection of this directory is critical for system security.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000162Change the owner of the file "/etc/audit/" to "root" by running the following command: + +$ sudo chown root /etc/audit/Verify the ownership of the "/etc/audit/" directory with the following command: + +$ sudo stat -c "%U %n" /etc/audit/ + +root /etc/audit/ + +If the "/etc/audit/" directory does not have an owner of "root", this is a finding.SRG-OS-000080-GPOS-00048<GroupDescription></GroupDescription>RHEL-09-232104RHEL 9 "/etc/audit/" must be group-owned by root.<VulnDiscussion>The "/etc/audit/" directory contains files that ensure the proper auditing of command execution, privilege escalation, file manipulation, and more. Protection of this directory is critical for system security.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-000162Change the group of the file "/etc/audit/" to "root" by running the following command: + +$ sudo chgrp root /etc/audit/Verify the group ownership of the "/etc/audit/" directory with the following command: + +$ sudo stat -c "%G %n" /etc/audit/ + +root /etc/audit/ + +If "/etc/audit/" does not have a group owner of "root", this is a finding.SRG-OS-000250-GPOS-00093<GroupDescription></GroupDescription>RHEL-09-255064The RHEL 9 SSH client must be configured to use only DOD-approved encryption ciphers employing FIPS 140-3 validated cryptographic hash algorithms to protect the confidentiality of SSH client connections.<VulnDiscussion>Without cryptographic integrity protections, information can be altered by unauthorized users without detection. + +Remote access (e.g., RDP) is access to DOD nonpublic information systems by an authorized user (or an information system) communicating through an external, nonorganization-controlled network. Remote access methods include, for example, dial-up, broadband, and wireless. + +Cryptographic mechanisms used for protecting the integrity of information include, for example, signed hash functions using asymmetric cryptography, enabling distribution of the public key to verify the hash information while maintaining the confidentiality of the secret key used to generate the hash. + +RHEL 9 incorporates systemwide crypto policies by default. The SSH configuration file has no effect on the ciphers, MACs, or algorithms unless specifically defined in the /etc/sysconfig/sshd file. The employed algorithms can be viewed in the /etc/crypto-policies/back-ends/openssh.config file.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-001453Configure the SSH client to use only ciphers employing FIPS 140-3 approved algorithms. + +Reinstall crypto-policies with the following command: + +$ sudo dnf -y reinstall crypto-policies + +Set the crypto-policy to FIPS with the following command: + +$ sudo update-crypto-policies --set FIPS + +Setting system policy to FIPS + +Note: Systemwide crypto policies are applied on application startup. It is recommended to restart the system for the change of policies to fully take place.Verify the SSH client is configured to use only ciphers employing FIPS 140-3 approved algorithms. + +To verify the ciphers in the systemwide SSH configuration file, use the following command: + +$ grep -i Ciphers /etc/crypto-policies/back-ends/openssh.config + +Ciphers aes256-gcm@openssh.com,aes256-ctr,aes128-gcm@openssh.com,aes128-ctr + +If the cipher entries in the "openssh.config" file have any ciphers other than "aes256-gcm@openssh.com,aes256-ctr,aes128-gcm@openssh.com,aes128-ctr", or they are missing or commented out, this is a finding.SRG-OS-000250-GPOS-00093<GroupDescription></GroupDescription>RHEL-09-255070The RHEL 9 SSH client must be configured to use only DOD-approved Message Authentication Codes (MACs) employing FIPS 140-3 validated cryptographic hash algorithms to protect the confidentiality of SSH client connections.<VulnDiscussion>Without cryptographic integrity protections, information can be altered by unauthorized users without detection. + +Remote access (e.g., RDP) is access to DOD nonpublic information systems by an authorized user (or an information system) communicating through an external, nonorganization-controlled network. Remote access methods include, for example, dial-up, broadband, and wireless. + +Cryptographic mechanisms used for protecting the integrity of information include, for example, signed hash functions using asymmetric cryptography, enabling distribution of the public key to verify the hash information while maintaining the confidentiality of the secret key used to generate the hash. + +RHEL 9 incorporates systemwide crypto policies by default. The SSH configuration file has no effect on the ciphers, MACs, or algorithms unless specifically defined in the /etc/sysconfig/sshd file. The employed algorithms can be viewed in the /etc/crypto-policies/back-ends/openssh.config file.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-001453Configure the SSH client to use only MACs employing FIPS 140-3 approved algorithms. + +Reinstall crypto-policies with the following command: + +$ sudo dnf -y reinstall crypto-policies + +Set the crypto-policy to FIPS with the following command: + +$ sudo update-crypto-policies --set FIPS + +Setting system policy to FIPS + +Note: Systemwide crypto policies are applied on application startup. It is recommended to restart the system for the change of policies to fully take place.Verify the SSH client is configured to use only MACs employing FIPS 140-3 approved algorithms. + +To verify the MACs in the systemwide SSH configuration file, use the following command: + +$ grep -i MACs /etc/crypto-policies/back-ends/openssh.config + +MACs hmac-sha2-256-etm@openssh.com,hmac-sha2-512-etm@openssh.com,hmac-sha2-256,hmac-sha2-512 + +If the MACs entries in the "openssh.config" file have any hashes other than "hmac-sha2-256-etm@openssh.com,hmac-sha2-512-etm@openssh.com,hmac-sha2-256,hmac-sha2-512", or they are missing or commented out, this is a finding.SRG-OS-000368-GPOS-00154<GroupDescription></GroupDescription>RHEL-09-433016The RHEL 9 fapolicy module must be configured to employ a deny-all, permit-by-exception policy to allow the execution of authorized software programs.<VulnDiscussion>The organization must identify authorized software programs and permit execution of authorized software. The process used to identify software programs that are authorized to execute on organizational information systems is commonly referred to as allow listing. + +Using an allow list provides a configuration management method for allowing the execution of only authorized software. Using only authorized software decreases risk by limiting the number of potential vulnerabilities. Verification of allow listed software occurs prior to execution or at system startup. + +User home directories/folders may contain information of a sensitive nature. Nonprivileged users should coordinate any sharing of information with an SA through shared resources. + +RHEL 9 ships with many optional packages. One such package is a file access policy daemon called "fapolicyd". "fapolicyd" is a userspace daemon that determines access rights to files based on attributes of the process and file. It can be used to either block list or allow list processes or file access. + +Proceed with caution with enforcing the use of this daemon. Improper configuration may render the system nonfunctional. The "fapolicyd" API is not namespace aware and can cause issues when launching or running containers. + +Satisfies: SRG-OS-000368-GPOS-00154, SRG-OS-000370-GPOS-00155, SRG-OS-000480-GPOS-00232</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>DPMS Target Red Hat Enterprise Linux 9DISADPMS TargetRed Hat Enterprise Linux 95551CCI-001764Configure RHEL 9 to employ a deny-all, permit-by-exception application allow listing policy with "fapolicyd". + +With the "fapolicyd" installed and enabled, configure the daemon to function in permissive mode until the allow list is built correctly to avoid system lockout. Do this by editing the "/etc/fapolicyd/fapolicyd.conf" file with the following line: + +permissive = 1 + +Build the allow list in a file within the "/etc/fapolicyd/rules.d" directory, ensuring the last rule is "deny perm=any all : all". + +Once it is determined the allow list is built correctly, set the "fapolicyd" to enforcing mode by editing the "permissive" line in the /etc/fapolicyd/fapolicyd.conf file. + +permissive = 0Verify the RHEL 9 "fapolicyd" employs a deny-all, permit-by-exception policy. + +Check that "fapolicyd" is in enforcement mode with the following command: + +$ sudo grep permissive /etc/fapolicyd/fapolicyd.conf + +permissive = 0 + +Check that "fapolicyd" employs a deny-all policy on system mounts with the following commands: + +$ sudo tail /etc/fapolicyd/compiled.rules + +allow exe=/usr/bin/python3.7 : ftype=text/x-python +deny_audit perm=any pattern=ld_so : all +deny perm=any all : all + +If "fapolicyd" is not running in enforcement mode with a deny-all, permit-by-exception policy, this is a finding. \ No newline at end of file diff --git a/shared/templates/accounts_password/ansible.template b/shared/templates/accounts_password/ansible.template index 858f462f33a..dc73e57ccf5 100644 --- a/shared/templates/accounts_password/ansible.template +++ b/shared/templates/accounts_password/ansible.template @@ -5,7 +5,7 @@ # disruption = low - (xccdf-var var_password_pam_{{{ VARIABLE }}}) -{{% if product == "ol8" %}} +{{% if product == "ol8" or 'rhel' in product %}} - name: {{{ rule_title }}} - Find pwquality.conf.d files ansible.builtin.find: paths: /etc/security/pwquality.conf.d/ diff --git a/shared/templates/accounts_password/bash.template b/shared/templates/accounts_password/bash.template index 9bc43015f8e..44e50228073 100644 --- a/shared/templates/accounts_password/bash.template +++ b/shared/templates/accounts_password/bash.template @@ -6,8 +6,8 @@ {{{ bash_instantiate_variables("var_password_pam_" ~ VARIABLE) }}} -{{% if product == "ol8" %}} -if grep -sq {{{ VARIABLE }}} /etc/security/pwquality.conf.d/*.conf ; then +{{% if product == "ol8" or 'rhel' in product %}} +if grep -sq {{{ VARIABLE }}} /etc/security/pwquality.conf.d/*.conf ; then sed -i "/{{{ VARIABLE }}}/d" /etc/security/pwquality.conf.d/*.conf fi {{% endif %}} diff --git a/shared/templates/accounts_password/oval.template b/shared/templates/accounts_password/oval.template index c83a666d90a..7eacdf62517 100644 --- a/shared/templates/accounts_password/oval.template +++ b/shared/templates/accounts_password/oval.template @@ -1,4 +1,4 @@ -{{% if product == "ol8" %}} +{{% if product == "ol8" or 'rhel' in product %}} {{% set filepath_regex="^/etc/security/pwquality\.conf(\.d/[^/]+\.conf)?$" %}} {{% else %}} {{% set filepath_regex="^/etc/security/pwquality\.conf$" %}} diff --git a/shared/templates/accounts_password/tests/conflicting_values_directory.fail.sh b/shared/templates/accounts_password/tests/conflicting_values_directory.fail.sh index 280f8fdf148..8c002663d64 100644 --- a/shared/templates/accounts_password/tests/conflicting_values_directory.fail.sh +++ b/shared/templates/accounts_password/tests/conflicting_values_directory.fail.sh @@ -1,6 +1,6 @@ #!/bin/bash # This test only applies to platforms that check the pwquality.conf.d directory -# platform = Oracle Linux 8 +# platform = Oracle Linux 8,multi_platform_rhel # variables = var_password_pam_{{{ VARIABLE }}}={{{ TEST_VAR_VALUE }}} truncate -s 0 /etc/security/pwquality.conf diff --git a/shared/templates/accounts_password/tests/correct_value_directory.pass.sh b/shared/templates/accounts_password/tests/correct_value_directory.pass.sh index 60b92709f2a..689093008c5 100644 --- a/shared/templates/accounts_password/tests/correct_value_directory.pass.sh +++ b/shared/templates/accounts_password/tests/correct_value_directory.pass.sh @@ -1,9 +1,9 @@ #!/bin/bash # This test only applies to platforms that check the pwquality.conf.d directory -# platform = Oracle Linux 8 +# platform = Oracle Linux 8,multi_platform_rhel # variables = var_password_pam_{{{ VARIABLE }}}={{{ TEST_VAR_VALUE }}} -# This test will ensure that OVAL also checks the configuration in +# This test will ensure that OVAL also checks the configuration in # /etc/security/pwquality.conf.d/*.conf files {{% if product == "ubuntu2404" %}} diff --git a/shared/templates/accounts_password/tests/wrong_value_directory.fail.sh b/shared/templates/accounts_password/tests/wrong_value_directory.fail.sh index 8673da1a005..bc3852603c4 100644 --- a/shared/templates/accounts_password/tests/wrong_value_directory.fail.sh +++ b/shared/templates/accounts_password/tests/wrong_value_directory.fail.sh @@ -2,7 +2,7 @@ # variables = var_password_pam_{{{ VARIABLE }}}={{{ TEST_VAR_VALUE }}} -# This test will ensure that the remediation also applies the configuration in +# This test will ensure that the remediation also applies the configuration in # /etc/security/pwquality.conf.d/*.conf files truncate -s 0 /etc/security/pwquality.conf diff --git a/tests/data/profile_stability/rhel9/stig.profile b/tests/data/profile_stability/rhel9/stig.profile index 01a64c6cec7..d082832014a 100644 --- a/tests/data/profile_stability/rhel9/stig.profile +++ b/tests/data/profile_stability/rhel9/stig.profile @@ -1,6 +1,6 @@ description: 'This profile contains configuration checks that align to the - DISA STIG for Red Hat Enterprise Linux 9 V2R1. + DISA STIG for Red Hat Enterprise Linux 9 V2R3. In addition to being applicable to Red Hat Enterprise Linux 9, DISA recognizes @@ -23,7 +23,7 @@ description: 'This profile contains configuration checks that align to the extends: null hidden: '' metadata: - version: V2R1 + version: V2R3 SMEs: - mab879 - ggbecker @@ -158,7 +158,6 @@ selections: - audit_rules_usergroup_modification_passwd - audit_rules_usergroup_modification_shadow - auditd_audispd_configure_sufficiently_large_partition -- auditd_audispd_syslog_plugin_activated - auditd_data_disk_error_action_stig - auditd_data_disk_full_action_stig - auditd_data_retention_action_mail_acct @@ -187,6 +186,7 @@ selections: - configure_opensc_card_drivers - configure_openssl_crypto_policy - configure_openssl_tls_crypto_policy +- configure_ssh_crypto_policy - configure_usbguard_auditbackend - configured_firewalld_default_deny - coredump_disable_backtraces @@ -199,6 +199,7 @@ selections: - dconf_gnome_disable_restart_shutdown - dconf_gnome_disable_user_list - dconf_gnome_lock_screen_on_smartcard_removal +- dconf_gnome_login_banner_text - dconf_gnome_screensaver_idle_delay - dconf_gnome_screensaver_lock_delay - dconf_gnome_screensaver_lock_enabled @@ -247,8 +248,10 @@ selections: - file_groupowner_etc_shadow - file_groupowner_grub2_cfg - file_groupowner_sshd_config +- file_groupowner_sshd_drop_in_config - file_groupowner_var_log - file_groupowner_var_log_messages +- file_groupownership_audit_configuration - file_groupownership_home_directories - file_groupownership_system_commands_dirs - file_owner_backup_etc_group @@ -268,11 +271,14 @@ selections: - file_owner_etc_shadow - file_owner_grub2_cfg - file_owner_sshd_config +- file_owner_sshd_drop_in_config - file_owner_var_log - file_owner_var_log_messages +- file_ownership_audit_configuration - file_ownership_binary_dirs - file_ownership_library_dirs - file_permission_user_init_files_root +- file_permissions_audit_configuration - file_permissions_backup_etc_group - file_permissions_backup_etc_gshadow - file_permissions_backup_etc_passwd @@ -285,7 +291,6 @@ selections: - file_permissions_cron_weekly - file_permissions_crontab - file_permissions_etc_audit_auditd -- file_permissions_etc_audit_rulesd - file_permissions_etc_group - file_permissions_etc_gshadow - file_permissions_etc_passwd @@ -293,6 +298,7 @@ selections: - file_permissions_home_directories - file_permissions_library_dirs - file_permissions_sshd_config +- file_permissions_sshd_drop_in_config - file_permissions_sshd_private_key - file_permissions_sshd_pub_key - file_permissions_ungroupowned @@ -461,6 +467,7 @@ selections: - sshd_set_idle_timeout - sshd_set_keepalive - sshd_set_loglevel_verbose +- sshd_use_strong_macs - sshd_x11_use_localhost - sssd_certificate_verification - sssd_enable_certmap @@ -507,8 +514,6 @@ selections: - sysctl_net_ipv6_conf_default_accept_redirects - sysctl_net_ipv6_conf_default_accept_source_route - sysctl_user_max_user_namespaces -- sysctl_user_max_user_namespaces.role=unscored -- sysctl_user_max_user_namespaces.severity=info - usbguard_generate_policy - use_pam_wheel_for_su - wireless_disable_interfaces @@ -540,7 +545,7 @@ selections: - var_accounts_minimum_age_login_defs=1 - var_password_pam_dcredit=1 - var_password_pam_lcredit=1 -- var_password_pam_unix_rounds=5000 +- var_password_pam_unix_rounds=100000 - var_password_pam_retry=3 - var_selinux_policy_name=targeted - var_selinux_state=enforcing @@ -560,6 +565,7 @@ selections: - var_sshd_set_keepalive=1 - var_rekey_limit_size=1G - var_rekey_limit_time=1hour +- sshd_strong_macs=stig_rhel9 - sshd_approved_ciphers=stig_rhel9 - var_networkmanager_dns_mode=explicit_default - var_multiple_time_servers=stig @@ -567,6 +573,8 @@ selections: - var_user_initialization_files_regex=all_dotfiles - login_banner_text=dod_banners - var_authselect_profile=sssd +- sysctl_user_max_user_namespaces.role=unscored +- sysctl_user_max_user_namespaces.severity=info unselected_groups: [] platforms: !!set {} cpe_names: !!set {} diff --git a/tests/data/profile_stability/rhel9/stig_gui.profile b/tests/data/profile_stability/rhel9/stig_gui.profile index 553047ffc4f..ae104fc38e4 100644 --- a/tests/data/profile_stability/rhel9/stig_gui.profile +++ b/tests/data/profile_stability/rhel9/stig_gui.profile @@ -1,6 +1,6 @@ description: 'This profile contains configuration checks that align to the - DISA STIG for Red Hat Enterprise Linux 9 V2R1. + DISA STIG for Red Hat Enterprise Linux 9 V2R3. @@ -35,7 +35,7 @@ description: 'This profile contains configuration checks that align to the extends: null hidden: '' metadata: - version: V2R1 + version: V2R3 SMEs: - mab879 - ggbecker @@ -170,7 +170,6 @@ selections: - audit_rules_usergroup_modification_passwd - audit_rules_usergroup_modification_shadow - auditd_audispd_configure_sufficiently_large_partition -- auditd_audispd_syslog_plugin_activated - auditd_data_disk_error_action_stig - auditd_data_disk_full_action_stig - auditd_data_retention_action_mail_acct @@ -199,6 +198,7 @@ selections: - configure_opensc_card_drivers - configure_openssl_crypto_policy - configure_openssl_tls_crypto_policy +- configure_ssh_crypto_policy - configure_usbguard_auditbackend - configured_firewalld_default_deny - coredump_disable_backtraces @@ -211,6 +211,7 @@ selections: - dconf_gnome_disable_restart_shutdown - dconf_gnome_disable_user_list - dconf_gnome_lock_screen_on_smartcard_removal +- dconf_gnome_login_banner_text - dconf_gnome_screensaver_idle_delay - dconf_gnome_screensaver_lock_delay - dconf_gnome_screensaver_lock_enabled @@ -259,8 +260,10 @@ selections: - file_groupowner_etc_shadow - file_groupowner_grub2_cfg - file_groupowner_sshd_config +- file_groupowner_sshd_drop_in_config - file_groupowner_var_log - file_groupowner_var_log_messages +- file_groupownership_audit_configuration - file_groupownership_home_directories - file_groupownership_system_commands_dirs - file_owner_backup_etc_group @@ -280,11 +283,14 @@ selections: - file_owner_etc_shadow - file_owner_grub2_cfg - file_owner_sshd_config +- file_owner_sshd_drop_in_config - file_owner_var_log - file_owner_var_log_messages +- file_ownership_audit_configuration - file_ownership_binary_dirs - file_ownership_library_dirs - file_permission_user_init_files_root +- file_permissions_audit_configuration - file_permissions_backup_etc_group - file_permissions_backup_etc_gshadow - file_permissions_backup_etc_passwd @@ -297,7 +303,6 @@ selections: - file_permissions_cron_weekly - file_permissions_crontab - file_permissions_etc_audit_auditd -- file_permissions_etc_audit_rulesd - file_permissions_etc_group - file_permissions_etc_gshadow - file_permissions_etc_passwd @@ -305,6 +310,7 @@ selections: - file_permissions_home_directories - file_permissions_library_dirs - file_permissions_sshd_config +- file_permissions_sshd_drop_in_config - file_permissions_sshd_private_key - file_permissions_sshd_pub_key - file_permissions_ungroupowned @@ -471,6 +477,7 @@ selections: - sshd_set_idle_timeout - sshd_set_keepalive - sshd_set_loglevel_verbose +- sshd_use_strong_macs - sshd_x11_use_localhost - sssd_certificate_verification - sssd_enable_certmap @@ -517,8 +524,6 @@ selections: - sysctl_net_ipv6_conf_default_accept_redirects - sysctl_net_ipv6_conf_default_accept_source_route - sysctl_user_max_user_namespaces -- sysctl_user_max_user_namespaces.role=unscored -- sysctl_user_max_user_namespaces.severity=info - usbguard_generate_policy - use_pam_wheel_for_su - wireless_disable_interfaces @@ -548,7 +553,7 @@ selections: - var_accounts_minimum_age_login_defs=1 - var_password_pam_dcredit=1 - var_password_pam_lcredit=1 -- var_password_pam_unix_rounds=5000 +- var_password_pam_unix_rounds=100000 - var_password_pam_retry=3 - var_selinux_policy_name=targeted - var_selinux_state=enforcing @@ -568,6 +573,7 @@ selections: - var_sshd_set_keepalive=1 - var_rekey_limit_size=1G - var_rekey_limit_time=1hour +- sshd_strong_macs=stig_rhel9 - sshd_approved_ciphers=stig_rhel9 - var_networkmanager_dns_mode=explicit_default - var_multiple_time_servers=stig @@ -575,6 +581,8 @@ selections: - var_user_initialization_files_regex=all_dotfiles - login_banner_text=dod_banners - var_authselect_profile=sssd +- sysctl_user_max_user_namespaces.role=unscored +- sysctl_user_max_user_namespaces.severity=info unselected_groups: [] platforms: !!set {} cpe_names: !!set {}