GNOME GDM 2.8, 2.12, 2.14, and 2.15, when the "face browser" feature is enabled, allows local users to access the "Configure Login Manager" functionality using their own password instead of the root password, which can be leveraged to gain additional privileges.

References

• https://nvd.nist.gov/vuln/detail/CVE-2006-2452
• https://exchange.xforce.ibmcloud.com/vulnerabilities/27018
• http://bugzilla.gnome.org/show_bug.cgi?id=343476
• http://lists.suse.com/archive/suse-security-announce/2006-Jun/0003.html
• http://secunia.com/advisories/20532
• http://secunia.com/advisories/20552
• http://secunia.com/advisories/20587
• http://secunia.com/advisories/20627
• http://secunia.com/advisories/20636
• http://www.gentoo.org/security/en/glsa/glsa-200606-14.xml
• http://www.mandriva.com/security/advisories?name=MDKSA-2006:100
• http://www.securityfocus.com/archive/1/436428
• http://www.securityfocus.com/bid/18332
• http://www.vupen.com/english/advisories/2006/2239
• https://usn.ubuntu.com/293-1