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semgrep.yml
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rules:
- id: go.lang.security.audit.crypto.bad_imports.insecure-module-used
message: >-
Detected use of an insecure cryptographic hashing method. This method is known
to be broken and easily compromised. Use SHA256 or SHA3 instead.
metadata:
owasp: 'A9: Using Components with Known Vulnerabilities'
cwe: 'CWE-327: Use of a Broken or Risky Cryptographic Algorithm'
source-rule-url: https://github.com/securego/gosec
references:
- https://godoc.org/golang.org/x/crypto/sha3
dev.semgrep.actions: &id001
- block
semgrep.policy:
id: 973
name: Golang Apps
slug: golang-apps
semgrep.url: https://semgrep.dev/r/go.lang.security.audit.crypto.bad_imports.insecure-module-used
semgrep.ruleset: gosec
languages: [go]
severity: WARNING
patterns:
- pattern-either:
- pattern: |
md5.$FUNC(...)
- pattern: |
des.$FUNC(...)
- pattern: |
sha1.$FUNC(...)
- pattern: |
rc4.$FUNC(...)
- pattern: |-
cgi.$FUNC(...)
- id: go.lang.security.audit.crypto.insecure_ssh.avoid-ssh-insecure-ignore-host-key
message: |
Disabled host key verification detected. This allows man-in-the-middle
attacks. Use the 'golang.org/x/crypto/ssh/knownhosts' package to do
host key verification.
See https://skarlso.github.io/2019/02/17/go-ssh-with-host-key-verification/
to learn more about the problem and how to fix it.
metadata:
cwe: 'CWE-322: Key Exchange without Entity Authentication'
owasp: 'A3: Sensitive Data Exposure'
source-rule-url: https://github.com/securego/gosec
references:
- https://skarlso.github.io/2019/02/17/go-ssh-with-host-key-verification/
- https://gist.github.com/Skarlso/34321a230cf0245018288686c9e70b2d
dev.semgrep.actions: *id001
semgrep.policy:
id: 973
name: Golang Apps
slug: golang-apps
semgrep.url: https://semgrep.dev/r/go.lang.security.audit.crypto.insecure_ssh.avoid-ssh-insecure-ignore-host-key
semgrep.ruleset: gosec
languages: [go]
severity: WARNING
pattern: |-
ssh.InsecureIgnoreHostKey()
- id: go.lang.security.audit.crypto.math_random.math-random-used
metadata:
cwe: 'CWE-338: Use of Cryptographically Weak Pseudo-Random Number Generator (PRNG)'
owasp: 'A3: Sensitive Data Exposure'
references:
- https://cheatsheetseries.owasp.org/cheatsheets/Cryptographic_Storage_Cheat_Sheet.html#secure-random-number-generation
dev.semgrep.actions: *id001
semgrep.policy:
id: 973
name: Golang Apps
slug: golang-apps
semgrep.url: https://semgrep.dev/r/go.lang.security.audit.crypto.math_random.math-random-used
semgrep.ruleset: gosec
message: Do not use `math/rand`. Use `crypto/rand` instead.
languages: [go]
severity: WARNING
pattern-either:
- patterns:
- pattern-inside: |
import mrand "math/rand"
...
- pattern-either:
- pattern: mrand.Int()
- pattern: mrand.Read(...)
- patterns:
- pattern-inside: |
import "math/rand"
...
- pattern-not-inside: |
import "crypto/rand"
...
- pattern-either:
- pattern: rand.Int()
- pattern: rand.Read(...)
- id: go.lang.security.audit.crypto.ssl.ssl-v3-is-insecure
message: |
SSLv3 is insecure because it has known vulnerabilities.
Starting with go1.14, SSLv3 will be removed. Instead, use
'tls.VersionTLS13'.
metadata:
cwe: 'CWE-327: Use of a Broken or Risky Cryptographic Algorithm'
owasp: 'A9: Using Components with Known Vulnerabilities'
source-rule-url: https://github.com/securego/gosec/blob/master/rules/tls_config.go
references:
- https://golang.org/doc/go1.14#crypto/tls
- https://www.us-cert.gov/ncas/alerts/TA14-290A
dev.semgrep.actions: *id001
semgrep.policy:
id: 973
name: Golang Apps
slug: golang-apps
semgrep.url: https://semgrep.dev/r/go.lang.security.audit.crypto.ssl.ssl-v3-is-insecure
semgrep.ruleset: gosec
languages: [go]
severity: ERROR
patterns:
- pattern: |-
tls.Config{..., MinVersion: $TLS.VersionSSL30, ...}
fix-regex:
regex: VersionSSL30
replacement: VersionTLS13
- id: go.lang.security.audit.crypto.tls.tls-with-insecure-cipher
message: |
Detected an insecure CipherSuite via the 'tls' module. This suite is considered weak.
Use the function 'tls.CipherSuites()' to get a list of good cipher suites.
See https://golang.org/pkg/crypto/tls/#InsecureCipherSuites
for why and what other cipher suites to use.
metadata:
cwe: 'CWE-327: Use of a Broken or Risky Cryptographic Algorithm'
owasp: 'A9: Using Components with Known Vulnerabilities'
source-rule-url: https://github.com/securego/gosec/blob/master/rules/tls.go
references:
- https://golang.org/pkg/crypto/tls/#InsecureCipherSuites
dev.semgrep.actions: *id001
semgrep.policy:
id: 973
name: Golang Apps
slug: golang-apps
semgrep.url: https://semgrep.dev/r/go.lang.security.audit.crypto.tls.tls-with-insecure-cipher
semgrep.ruleset: gosec
languages: [go]
severity: WARNING
pattern-either:
- pattern: |
tls.Config{..., CipherSuites: []$TYPE{..., tls.TLS_RSA_WITH_RC4_128_SHA,...}}
- pattern: |
tls.Config{..., CipherSuites: []$TYPE{..., tls.TLS_RSA_WITH_AES_128_CBC_SHA256,...}}
- pattern: |
tls.Config{..., CipherSuites: []$TYPE{..., tls.TLS_ECDHE_ECDSA_WITH_RC4_128_SHA,...}}
- pattern: |
tls.Config{..., CipherSuites: []$TYPE{..., tls.TLS_ECDHE_RSA_WITH_RC4_128_SHA,...}}
- pattern: |
tls.Config{..., CipherSuites: []$TYPE{..., tls.TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256,...}}
- pattern: |
tls.Config{..., CipherSuites: []$TYPE{..., tls.TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256,...}}
- pattern: |
tls.CipherSuite{..., TLS_RSA_WITH_RC4_128_SHA ,...}
- pattern: |
tls.CipherSuite{..., TLS_RSA_WITH_AES_128_CBC_SHA256 ,...}
- pattern: |
tls.CipherSuite{..., TLS_ECDHE_ECDSA_WITH_RC4_128_SHA ,...}
- pattern: |
tls.CipherSuite{..., TLS_ECDHE_RSA_WITH_RC4_128_SHA ,...}
- pattern: |
tls.CipherSuite{..., TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256 ,...}
- pattern: |-
tls.CipherSuite{..., TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256 ,...}
- id: go.lang.security.audit.crypto.use_of_weak_crypto.use-of-md5
message: |
Detected MD5 hash algorithm which is considered insecure. MD5 is not
collision resistant and is therefore not suitable as a cryptographic
signature. Use SHA256 or SHA3 instead.
languages: [go]
severity: WARNING
metadata:
owasp: 'A9: Using Components with Known Vulnerabilities'
cwe: 'CWE-327: Use of a Broken or Risky Cryptographic Algorithm'
source-rule-url: https://github.com/securego/gosec#available-rules
dev.semgrep.actions: *id001
semgrep.policy:
id: 973
name: Golang Apps
slug: golang-apps
semgrep.url: https://semgrep.dev/r/go.lang.security.audit.crypto.use_of_weak_crypto.use-of-md5
semgrep.ruleset: gosec
pattern-either:
- pattern: |
md5.New()
- pattern: |
md5.Sum(...)
- id: go.lang.security.audit.crypto.use_of_weak_crypto.use-of-sha1
message: |
Detected SHA1 hash algorithm which is considered insecure. SHA1 is not
collision resistant and is therefore not suitable as a cryptographic
signature. Use SHA256 or SHA3 instead.
languages: [go]
severity: WARNING
metadata:
owasp: 'A9: Using Components with Known Vulnerabilities'
cwe: 'CWE-327: Use of a Broken or Risky Cryptographic Algorithm'
source-rule-url: https://github.com/securego/gosec#available-rules
dev.semgrep.actions: *id001
semgrep.policy:
id: 973
name: Golang Apps
slug: golang-apps
semgrep.url: https://semgrep.dev/r/go.lang.security.audit.crypto.use_of_weak_crypto.use-of-sha1
semgrep.ruleset: gosec
pattern-either:
- pattern: |
sha1.New()
- pattern: |
sha1.Sum(...)
- id: go.lang.security.audit.crypto.use_of_weak_crypto.use-of-DES
message: |
Detected DES cipher algorithm which is insecure. The algorithm is
considered weak and has been deprecated. Use AES instead.
languages: [go]
severity: WARNING
metadata:
owasp: 'A9: Using Components with Known Vulnerabilities'
cwe: 'CWE-327: Use of a Broken or Risky Cryptographic Algorithm'
source-rule-url: https://github.com/securego/gosec#available-rules
dev.semgrep.actions: *id001
semgrep.policy:
id: 973
name: Golang Apps
slug: golang-apps
semgrep.url: https://semgrep.dev/r/go.lang.security.audit.crypto.use_of_weak_crypto.use-of-DES
semgrep.ruleset: gosec
pattern-either:
- pattern: |
des.NewTripleDESCipher(...)
- pattern: |
des.NewCipher(...)
- id: go.lang.security.audit.crypto.use_of_weak_crypto.use-of-rc4
message: |
Detected RC4 cipher algorithm which is insecure. The algorithm has many
known vulnerabilities. Use AES instead.
languages: [go]
severity: WARNING
metadata:
owasp: 'A9: Using Components with Known Vulnerabilities'
cwe: 'CWE-327: Use of a Broken or Risky Cryptographic Algorithm'
source-rule-url: https://github.com/securego/gosec#available-rules
dev.semgrep.actions: *id001
semgrep.policy:
id: 973
name: Golang Apps
slug: golang-apps
semgrep.url: https://semgrep.dev/r/go.lang.security.audit.crypto.use_of_weak_crypto.use-of-rc4
semgrep.ruleset: gosec
pattern: |-
rc4.NewCipher(...)
- id: go.lang.security.audit.database.string-formatted-query.string-formatted-query
languages: [go]
message: |
String-formatted SQL query detected. This could lead to SQL injection if
the string is not sanitized properly. Audit this call to ensure the
SQL is not manipulatable by external data.
severity: WARNING
metadata:
owasp: 'A1: Injection'
cwe: "CWE-89: Improper Neutralization of Special Elements used in an SQL Command\
\ ('SQL Injection')"
source-rule-url: https://github.com/securego/gosec
dev.semgrep.actions: *id001
semgrep.policy:
id: 973
name: Golang Apps
slug: golang-apps
semgrep.url: https://semgrep.dev/r/go.lang.security.audit.database.string-formatted-query.string-formatted-query
semgrep.ruleset: gosec
patterns:
- pattern-either:
- pattern: $OBJ.Exec("..." + $X)
- pattern: $OBJ.ExecContext($CTX, "..." + $X)
- pattern: $OBJ.Query("..." + $X)
- pattern: $OBJ.QueryContext($CTX, "..." + $X)
- pattern: $OBJ.QueryRow("..." + $X)
- pattern: $OBJ.QueryRow($CTX, "..." + $X)
- pattern: $OBJ.QueryRowContext($CTX, "..." + $X)
- pattern: $OBJ.Exec(fmt.$P("...", ...))
- pattern: $OBJ.ExecContext($CTX, fmt.$P("...", ...))
- pattern: $OBJ.Query(fmt.$P("...", ...))
- pattern: $OBJ.QueryContext($CTX, fmt.$P("...", ...))
- pattern: $OBJ.QueryRow(fmt.$P("...", ...))
- pattern: $OBJ.QueryRow($CTX, fmt.$P("...", ...))
- pattern: $OBJ.QueryRowContext($CTX, fmt.$P("...", ...))
- pattern: |
$QUERY = "..."
...
$QUERY = $FXN(..., $QUERY, ...)
...
$OBJ.Exec($QUERY, ...)
- pattern: |
$QUERY = "..."
...
$QUERY = $FXN(..., $QUERY, ...)
...
$OBJ.Query($QUERY, ...)
- pattern: |
$QUERY = "..."
...
$QUERY = $FXN(..., $QUERY, ...)
...
$OBJ.ExecContext($CTX, $QUERY, ...)
- pattern: |
$QUERY = "..."
...
$QUERY = $FXN(..., $QUERY, ...)
...
$OBJ.QueryContext($CTX, $QUERY, ...)
- pattern: |
$QUERY = "..."
...
$QUERY = $FXN(..., $QUERY, ...)
...
$OBJ.QueryRow($QUERY)
- pattern: |
$QUERY = "..."
...
$QUERY = $FXN(..., $QUERY, ...)
...
$OBJ.QueryRow($CTX, $QUERY)
- pattern: |
$QUERY = "..."
...
$QUERY = $FXN(..., $QUERY, ...)
...
$OBJ.QueryRowContext($CTX, $QUERY, ...)
- pattern: |
$QUERY = "..."
...
$OTHER = $FXN(..., $QUERY, ...)
...
$OBJ.Exec($OTHER, ...)
- pattern: |
$QUERY = "..."
...
$OTHER = $FXN(..., $QUERY, ...)
...
$OBJ.Query($OTHER, ...)
- pattern: |
$QUERY = "..."
...
$OTHER = $FXN(..., $QUERY, ...)
...
$OBJ.ExecContext($CTX, $OTHER, ...)
- pattern: |
$QUERY = "..."
...
$OTHER = $FXN(..., $QUERY, ...)
...
$OBJ.QueryContext($CTX, $OTHER, ...)
- pattern: |
$QUERY = "..."
...
$OTHER = $FXN(..., $QUERY, ...)
...
$OBJ.QueryRow($OTHER)
- pattern: |
$QUERY = "..."
...
$OTHER = $FXN(..., $QUERY, ...)
...
$OBJ.QueryRow($CTX, $OTHER)
- pattern: |
$QUERY = "..."
...
$OTHER = $FXN(..., $QUERY, ...)
...
$OBJ.QueryRowContext($CTX, $OTHER, ...)
- pattern: |
$QUERY = "..." + $X
...
$OBJ.Exec($QUERY, ...)
- pattern: |
$QUERY = "..." + $X
...
$OBJ.Query($QUERY, ...)
- pattern: |
$QUERY = "..." + $X
...
$OBJ.ExecContext($CTX, $QUERY, ...)
- pattern: |
$QUERY = "..." + $X
...
$OBJ.QueryContext($CTX, $QUERY, ...)
- pattern: |
$QUERY = "..." + $X
...
$OBJ.QueryRow($QUERY)
- pattern: |
$QUERY = "..." + $X
...
$OBJ.QueryRow($CTX, $QUERY)
- pattern: |
$QUERY = "..." + $X
...
$OBJ.QueryRowContext($CTX, $QUERY, ...)
- id: go.lang.security.audit.net.bind_all.avoid-bind-to-all-interfaces
message: Listening on 0.0.0.0 or empty string could unexpectedly expose the server
publicly as it binds to all available interfaces
languages: [go]
severity: WARNING
metadata:
cwe: 'CWE-200: Exposure of Sensitive Information to an Unauthorized Actor'
owasp: 'A6: Security Misconfiguration'
source-rule-url: https://github.com/securego/gosec
dev.semgrep.actions: *id001
semgrep.policy:
id: 973
name: Golang Apps
slug: golang-apps
semgrep.url: https://semgrep.dev/r/go.lang.security.audit.net.bind_all.avoid-bind-to-all-interfaces
semgrep.ruleset: gosec
pattern-either:
- pattern: tls.Listen($NETWORK, "=~/^0.0.0.0:.*$/", ...)
- pattern: net.Listen($NETWORK, "=~/^0.0.0.0:.*$/", ...)
- pattern: tls.Listen($NETWORK, "=~/^:.*$/", ...)
- pattern: net.Listen($NETWORK, "=~/^:.*$/", ...)
- id: go.lang.security.audit.net.dynamic-httptrace-clienttrace.dynamic-httptrace-clienttrace
message: |
Detected a potentially dynamic ClientTrace. This occurred because semgrep could not
find a static definition for '$TRACE'. Dynamic ClientTraces are dangerous because
they deserialize function code to run when certain Request events occur, which could lead
to code being run without your knowledge. Ensure that your ClientTrace is statically defined.
metadata:
cwe: 'CWE-913: Improper Control of Dynamically-Managed Code Resources'
owasp: 'A8: Insecure Deserialization'
references:
- https://github.com/returntocorp/semgrep-rules/issues/518
# Detects when a static ClientTrace is not defined in the same file as
# WithClientTrace. Not a perfect detection, but sufficiently works in a
# scan of ~1k repos: https://dev.massive.ret2.co/triager/filter/1007
dev.semgrep.actions: *id001
semgrep.policy:
id: 973
name: Golang Apps
slug: golang-apps
semgrep.url: https://semgrep.dev/r/go.lang.security.audit.net.dynamic-httptrace-clienttrace.dynamic-httptrace-clienttrace
semgrep.ruleset: gosec
patterns:
- pattern-not-inside: |
...
&httptrace.ClientTrace { ... }
...
- pattern: httptrace.WithClientTrace($ANY, $TRACE)
severity: WARNING
languages:
- go
- id: go.lang.security.audit.net.formatted-template-string.formatted-template-string
message: |
Found a formatted template string passed to 'template.HTML()'.
'template.HTML()' does not escape contents. Be absolutely sure
there is no user-controlled data in this template. If user data
can reach this template, you may have a XSS vulnerability.
metadata:
cwe: "CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site\
\ Scripting')"
owasp: 'A1: Injection'
references:
- https://golang.org/pkg/html/template/#HTML
dev.semgrep.actions: *id001
semgrep.policy:
id: 973
name: Golang Apps
slug: golang-apps
semgrep.url: https://semgrep.dev/r/go.lang.security.audit.net.formatted-template-string.formatted-template-string
semgrep.ruleset: gosec
languages: [go]
severity: WARNING
patterns:
- pattern-not: template.HTML("..." + "...")
- pattern-either:
- pattern: template.HTML($T + $X, ...)
- pattern: template.HTML(fmt.$P("...", ...), ...)
- pattern: |
$T = "..."
...
$T = $FXN(..., $T, ...)
...
template.HTML($T, ...)
- pattern: |
$T = fmt.$P("...", ...)
...
template.HTML($T, ...)
- pattern: |
$T, $ERR = fmt.$P("...", ...)
...
template.HTML($T, ...)
- pattern: |
$T = $X + $Y
...
template.HTML($T, ...)
- pattern: |
$T = "..."
...
$OTHER, $ERR = fmt.$P(..., $T, ...)
...
template.HTML($OTHER, ...)
- id: go.lang.security.audit.net.unescaped-data-in-htmlattr.unescaped-data-in-htmlattr
message: |
Found a formatted template string passed to 'template.HTMLAttr()'.
'template.HTMLAttr()' does not escape contents. Be absolutely sure
there is no user-controlled data in this template.
metadata:
cwe: "CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site\
\ Scripting')"
owasp: 'A1: Injection'
references:
- https://golang.org/pkg/html/template/#HTMLAttr
dev.semgrep.actions: *id001
semgrep.policy:
id: 973
name: Golang Apps
slug: golang-apps
semgrep.url: https://semgrep.dev/r/go.lang.security.audit.net.unescaped-data-in-htmlattr.unescaped-data-in-htmlattr
semgrep.ruleset: gosec
languages: [go]
severity: WARNING
patterns:
- pattern-either:
- pattern: template.HTMLAttr($T + $X, ...)
- pattern: template.HTMLAttr(fmt.$P("...", ...), ...)
- pattern: |
$T = "..."
...
$T = $FXN(..., $T, ...)
...
template.HTMLAttr($T, ...)
- pattern: |
$T = fmt.$P("...", ...)
...
template.HTMLAttr($T, ...)
- pattern: |
$T, $ERR = fmt.$P("...", ...)
...
template.HTMLAttr($T, ...)
- pattern: |
$T = $X + $Y
...
template.HTMLAttr($T, ...)
- pattern: |
$T = "..."
...
$OTHER, $ERR = fmt.$P(..., $T, ...)
...
template.HTMLAttr($OTHER, ...)
- id: go.lang.security.audit.net.unescaped-data-in-js.unescaped-data-in-js
message: |
Found a formatted template string passed to 'template.JS()'.
'template.JS()' does not escape contents. Be absolutely sure
there is no user-controlled data in this template.
metadata:
cwe: "CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site\
\ Scripting')"
owasp: 'A1: Injection'
references:
- https://golang.org/pkg/html/template/#JS
dev.semgrep.actions: *id001
semgrep.policy:
id: 973
name: Golang Apps
slug: golang-apps
semgrep.url: https://semgrep.dev/r/go.lang.security.audit.net.unescaped-data-in-js.unescaped-data-in-js
semgrep.ruleset: gosec
languages: [go]
severity: WARNING
patterns:
- pattern-either:
- pattern: template.JS($T + $X, ...)
- pattern: template.JS(fmt.$P("...", ...), ...)
- pattern: |
$T = "..."
...
$T = $FXN(..., $T, ...)
...
template.JS($T, ...)
- pattern: |
$T = fmt.$P("...", ...)
...
template.JS($T, ...)
- pattern: |
$T, $ERR = fmt.$P("...", ...)
...
template.JS($T, ...)
- pattern: |
$T = $X + $Y
...
template.JS($T, ...)
- pattern: |
$T = "..."
...
$OTHER, $ERR = fmt.$P(..., $T, ...)
...
template.JS($OTHER, ...)
- id: go.lang.security.audit.net.unescaped-data-in-url.unescaped-data-in-url
message: |
Found a formatted template string passed to 'template.URL()'.
'template.URL()' does not escape contents. Be absolutely sure
there is no user-controlled data in this template.
metadata:
cwe: "CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site\
\ Scripting')"
owasp: 'A1: Injection'
references:
- https://golang.org/pkg/html/template/#URL
dev.semgrep.actions: *id001
semgrep.policy:
id: 973
name: Golang Apps
slug: golang-apps
semgrep.url: https://semgrep.dev/r/go.lang.security.audit.net.unescaped-data-in-url.unescaped-data-in-url
semgrep.ruleset: gosec
languages: [go]
severity: WARNING
patterns:
- pattern-either:
- pattern: template.URL($T + $X, ...)
- pattern: template.URL(fmt.$P("...", ...), ...)
- pattern: |
$T = "..."
...
$T = $FXN(..., $T, ...)
...
template.URL($T, ...)
- pattern: |
$T = fmt.$P("...", ...)
...
template.URL($T, ...)
- pattern: |
$T, $ERR = fmt.$P("...", ...)
...
template.URL($T, ...)
- pattern: |
$T = $X + $Y
...
template.URL($T, ...)
- pattern: |
$T = "..."
...
$OTHER, $ERR = fmt.$P(..., $T, ...)
...
template.URL($OTHER, ...)
- id: go.lang.security.audit.unsafe.use-of-unsafe-block
message: Using the unsafe package in Go gives you low-level memory management and
many of the strengths of the C language but also gives flexibility to the attacker
of your application.
languages: [go]
severity: WARNING
metadata:
cwe: 'CWE-242: Use of Inherently Dangerous Function'
source_rule_url: https://github.com/securego/gosec/blob/master/rules/unsafe.go
dev.semgrep.actions: *id001
semgrep.policy:
id: 973
name: Golang Apps
slug: golang-apps
semgrep.url: https://semgrep.dev/r/go.lang.security.audit.unsafe.use-of-unsafe-block
semgrep.ruleset: gosec
patterns:
- pattern: unsafe.$FUNC(...)
- id: go.lang.security.bad_tmp.bad-tmp-file-creation
message: File creation in shared tmp directory without using ioutil.Tempfile
languages: [go]
severity: WARNING
metadata:
cwe: 'CWE-377: Insecure Temporary File'
source_rule_url: https://github.com/securego/gosec
dev.semgrep.actions: *id001
semgrep.policy:
id: 973
name: Golang Apps
slug: golang-apps
semgrep.url: https://semgrep.dev/r/go.lang.security.bad_tmp.bad-tmp-file-creation
semgrep.ruleset: gosec
pattern-either:
- pattern: ioutil.WriteFile("=~//tmp/.*$/", ...)
- pattern: os.Create("=~//tmp/.*$/", ...)
- id: go.lang.security.decompression_bomb.potential-dos-via-decompression-bomb
message: >-
Detected a possible denial-of-service via a zip bomb attack. By limiting the max
bytes read, you can mitigate this attack.
`io.CopyN()` can specify a size. Refer to https://bomb.codes/ to learn more about
this attack and other ways to mitigate
it.
severity: WARNING
languages: [go]
patterns:
- pattern-either:
- pattern: io.Copy(...)
- pattern: io.CopyBuffer(...)
- pattern-either:
- pattern-inside: |
gzip.NewReader(...)
...
- pattern-inside: |
zlib.NewReader(...)
...
- pattern-inside: |
zlib.NewReaderDict(...)
...
- pattern-inside: |
bzip2.NewReader(...)
...
- pattern-inside: |
flate.NewReader(...)
...
- pattern-inside: |
flate.NewReaderDict(...)
...
- pattern-inside: |
lzw.NewReader(...)
...
- pattern-inside: |
tar.NewReader(...)
...
- pattern-inside: |
zip.NewReader(...)
...
- pattern-inside: |
zip.OpenReader(...)
...
fix-regex:
regex: (.*)(Copy|CopyBuffer)\((.*?),(.*?)(\)|,.*\))
replacement: \1CopyN(\3, \4, 1024*1024*256)
metadata:
cwe: 'CWE-400: Uncontrolled Resource Consumption'
source-rule-url: https://github.com/securego/gosec
references:
- https://bomb.codes/
- https://golang.org/pkg/io/#CopyN
- https://github.com/securego/gosec/blob/master/rules/decompression-bomb.go
dev.semgrep.actions: *id001
semgrep.policy:
id: 973
name: Golang Apps
slug: golang-apps
semgrep.url: https://semgrep.dev/r/go.lang.security.decompression_bomb.potential-dos-via-decompression-bomb
semgrep.ruleset: gosec
- id: go.lang.security.zip.path-traversal-inside-zip-extraction
message: File traversal when extracting zip archive
metadata:
cwe: |
CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
source_rule_url: https://github.com/securego/gosec/issues/205
dev.semgrep.actions: *id001
semgrep.policy:
id: 973
name: Golang Apps
slug: golang-apps
semgrep.url: https://semgrep.dev/r/go.lang.security.zip.path-traversal-inside-zip-extraction
semgrep.ruleset: gosec
languages: [go]
severity: WARNING
patterns:
- pattern: |-
reader, $ERR := zip.OpenReader($ARCHIVE)
...
for _, $FILE := range reader.File {
...
path := filepath.Join($TARGET, $FILE.Name)
...
}
- id: go.lang.security.audit.reflect-makefunc.reflect-makefunc
message: |
'reflect.MakeFunc' detected. This will sidestep protections that are
normally afforded by Go's type system. Audit this call and be sure that
user input cannot be used to affect the code generated by MakeFunc;
otherwise, you will have a serious security vulnerability.
metadata:
owasp: 'A8: Insecure Deserialization'
cwe: 'CWE-913: Improper Control of Dynamically-Managed Code Resources'
dev.semgrep.actions: *id001
semgrep.policy:
id: 973
name: Golang Apps
slug: golang-apps
semgrep.url: https://semgrep.dev/r/go.lang.security.audit.reflect-makefunc.reflect-makefunc
semgrep.ruleset: golang
severity: WARNING
pattern: reflect.MakeFunc(...)
languages:
- go
- id: go.lang.security.audit.database.string-formatted-query.string-formatted-query
languages: [go]
message: |
String-formatted SQL query detected. This could lead to SQL injection if
the string is not sanitized properly. Audit this call to ensure the
SQL is not manipulatable by external data.
severity: WARNING
metadata:
owasp: 'A1: Injection'
cwe: "CWE-89: Improper Neutralization of Special Elements used in an SQL Command\
\ ('SQL Injection')"
source-rule-url: https://github.com/securego/gosec
dev.semgrep.actions: *id001
semgrep.policy:
id: 973
name: Golang Apps
slug: golang-apps
semgrep.url: https://semgrep.dev/r/go.lang.security.audit.database.string-formatted-query.string-formatted-query
semgrep.ruleset: golang
patterns:
- pattern-either:
- pattern: $OBJ.Exec("..." + $X)
- pattern: $OBJ.ExecContext($CTX, "..." + $X)
- pattern: $OBJ.Query("..." + $X)
- pattern: $OBJ.QueryContext($CTX, "..." + $X)
- pattern: $OBJ.QueryRow("..." + $X)
- pattern: $OBJ.QueryRow($CTX, "..." + $X)
- pattern: $OBJ.QueryRowContext($CTX, "..." + $X)
- pattern: $OBJ.Exec(fmt.$P("...", ...))
- pattern: $OBJ.ExecContext($CTX, fmt.$P("...", ...))
- pattern: $OBJ.Query(fmt.$P("...", ...))
- pattern: $OBJ.QueryContext($CTX, fmt.$P("...", ...))
- pattern: $OBJ.QueryRow(fmt.$P("...", ...))
- pattern: $OBJ.QueryRow($CTX, fmt.$P("...", ...))
- pattern: $OBJ.QueryRowContext($CTX, fmt.$P("...", ...))
- pattern: |
$QUERY = "..."
...
$QUERY = $FXN(..., $QUERY, ...)
...
$OBJ.Exec($QUERY, ...)
- pattern: |
$QUERY = "..."
...
$QUERY = $FXN(..., $QUERY, ...)
...
$OBJ.Query($QUERY, ...)
- pattern: |
$QUERY = "..."
...
$QUERY = $FXN(..., $QUERY, ...)
...
$OBJ.ExecContext($CTX, $QUERY, ...)
- pattern: |
$QUERY = "..."
...
$QUERY = $FXN(..., $QUERY, ...)
...
$OBJ.QueryContext($CTX, $QUERY, ...)
- pattern: |
$QUERY = "..."
...
$QUERY = $FXN(..., $QUERY, ...)
...
$OBJ.QueryRow($QUERY)
- pattern: |
$QUERY = "..."
...
$QUERY = $FXN(..., $QUERY, ...)
...
$OBJ.QueryRow($CTX, $QUERY)
- pattern: |
$QUERY = "..."
...
$QUERY = $FXN(..., $QUERY, ...)
...
$OBJ.QueryRowContext($CTX, $QUERY, ...)
- pattern: |
$QUERY = "..."
...
$OTHER = $FXN(..., $QUERY, ...)
...
$OBJ.Exec($OTHER, ...)
- pattern: |
$QUERY = "..."
...
$OTHER = $FXN(..., $QUERY, ...)
...
$OBJ.Query($OTHER, ...)
- pattern: |
$QUERY = "..."
...
$OTHER = $FXN(..., $QUERY, ...)
...
$OBJ.ExecContext($CTX, $OTHER, ...)
- pattern: |
$QUERY = "..."
...
$OTHER = $FXN(..., $QUERY, ...)
...
$OBJ.QueryContext($CTX, $OTHER, ...)
- pattern: |
$QUERY = "..."
...
$OTHER = $FXN(..., $QUERY, ...)
...
$OBJ.QueryRow($OTHER)
- pattern: |
$QUERY = "..."
...
$OTHER = $FXN(..., $QUERY, ...)
...
$OBJ.QueryRow($CTX, $OTHER)
- pattern: |
$QUERY = "..."
...
$OTHER = $FXN(..., $QUERY, ...)
...
$OBJ.QueryRowContext($CTX, $OTHER, ...)
- pattern: |
$QUERY = "..." + $X
...
$OBJ.Exec($QUERY, ...)
- pattern: |
$QUERY = "..." + $X
...
$OBJ.Query($QUERY, ...)
- pattern: |
$QUERY = "..." + $X
...
$OBJ.ExecContext($CTX, $QUERY, ...)
- pattern: |
$QUERY = "..." + $X
...
$OBJ.QueryContext($CTX, $QUERY, ...)
- pattern: |
$QUERY = "..." + $X
...
$OBJ.QueryRow($QUERY)
- pattern: |
$QUERY = "..." + $X
...
$OBJ.QueryRow($CTX, $QUERY)
- pattern: |
$QUERY = "..." + $X
...
$OBJ.QueryRowContext($CTX, $QUERY, ...)
- id: go.lang.security.audit.crypto.tls.tls-with-insecure-cipher
message: |
Detected an insecure CipherSuite via the 'tls' module. This suite is considered weak.
Use the function 'tls.CipherSuites()' to get a list of good cipher suites.
See https://golang.org/pkg/crypto/tls/#InsecureCipherSuites
for why and what other cipher suites to use.
metadata:
cwe: 'CWE-327: Use of a Broken or Risky Cryptographic Algorithm'
owasp: 'A9: Using Components with Known Vulnerabilities'
source-rule-url: https://github.com/securego/gosec/blob/master/rules/tls.go
references:
- https://golang.org/pkg/crypto/tls/#InsecureCipherSuites
dev.semgrep.actions: *id001
semgrep.policy:
id: 973
name: Golang Apps
slug: golang-apps
semgrep.url: https://semgrep.dev/r/go.lang.security.audit.crypto.tls.tls-with-insecure-cipher
semgrep.ruleset: golang
languages: [go]
severity: WARNING
pattern-either:
- pattern: |
tls.Config{..., CipherSuites: []$TYPE{..., tls.TLS_RSA_WITH_RC4_128_SHA,...}}
- pattern: |
tls.Config{..., CipherSuites: []$TYPE{..., tls.TLS_RSA_WITH_AES_128_CBC_SHA256,...}}
- pattern: |
tls.Config{..., CipherSuites: []$TYPE{..., tls.TLS_ECDHE_ECDSA_WITH_RC4_128_SHA,...}}
- pattern: |
tls.Config{..., CipherSuites: []$TYPE{..., tls.TLS_ECDHE_RSA_WITH_RC4_128_SHA,...}}
- pattern: |
tls.Config{..., CipherSuites: []$TYPE{..., tls.TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256,...}}
- pattern: |
tls.Config{..., CipherSuites: []$TYPE{..., tls.TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256,...}}
- pattern: |
tls.CipherSuite{..., TLS_RSA_WITH_RC4_128_SHA ,...}
- pattern: |
tls.CipherSuite{..., TLS_RSA_WITH_AES_128_CBC_SHA256 ,...}
- pattern: |
tls.CipherSuite{..., TLS_ECDHE_ECDSA_WITH_RC4_128_SHA ,...}
- pattern: |
tls.CipherSuite{..., TLS_ECDHE_RSA_WITH_RC4_128_SHA ,...}
- pattern: |
tls.CipherSuite{..., TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256 ,...}
- pattern: |-
tls.CipherSuite{..., TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256 ,...}
- id: go.lang.security.audit.crypto.insecure_ssh.avoid-ssh-insecure-ignore-host-key
message: |
Disabled host key verification detected. This allows man-in-the-middle
attacks. Use the 'golang.org/x/crypto/ssh/knownhosts' package to do
host key verification.
See https://skarlso.github.io/2019/02/17/go-ssh-with-host-key-verification/
to learn more about the problem and how to fix it.
metadata:
cwe: 'CWE-322: Key Exchange without Entity Authentication'
owasp: 'A3: Sensitive Data Exposure'
source-rule-url: https://github.com/securego/gosec
references:
- https://skarlso.github.io/2019/02/17/go-ssh-with-host-key-verification/
- https://gist.github.com/Skarlso/34321a230cf0245018288686c9e70b2d
dev.semgrep.actions: *id001
semgrep.policy:
id: 973
name: Golang Apps
slug: golang-apps
semgrep.url: https://semgrep.dev/r/go.lang.security.audit.crypto.insecure_ssh.avoid-ssh-insecure-ignore-host-key
semgrep.ruleset: golang
languages: [go]