The init script in the Debian x11-common package before 1:7.6+12 is vulnerable to a symlink attack that can lead to a privilege escalation during package installation.

References

• https://nvd.nist.gov/vuln/detail/CVE-2012-1093
• https://access.redhat.com/security/cve/cve-2012-1093
• https://lists.apache.org/thread.html/rf9fa47ab66495c78bb4120b0754dd9531ca2ff0430f6685ac9b07772@%3Cdev.mina.apache.org%3E
• https://security-tracker.debian.org/tracker/CVE-2012-1093
• http://vladz.devzero.fr/012_x11-common-vuln.html
• http://www.openwall.com/lists/oss-security/2012/02/29/1
• http://www.openwall.com/lists/oss-security/2012/03/01/1