CVE-2009-2939

Publication date 21 September 2009

Last updated 24 July 2024

Ubuntu priority

Negligible

Why this priority?

The postfix.postinst script in the Debian GNU/Linux and Ubuntu postfix 2.5.5 package grants the postfix user write access to /var/spool/postfix/pid, which might allow local users to conduct symlink attacks that overwrite arbitrary files.

Read the notes from the security team

Status

No maintained releases are affected by this CVE.

Package Ubuntu Release Status
postfix 10.10 maverick
Fixed 2.6.5-3
10.04 LTS lucid
Fixed 2.6.5-3
9.10 karmic
Fixed 2.6.5-3
9.04 jaunty Ignored end of life
8.10 intrepid Ignored end of life, was needed
8.04 LTS hardy
Fixed 2.5.1-2ubuntu1.3
6.06 LTS dapper
Fixed 2.2.10-1ubuntu0.3

Notes

jdstrand

per Weitse, the symlink attack should not be possible due to defensive programming. A subverted postfix process running as ‘postfix’ could replace the pid file, which master could then send signals to.

References

Related Ubuntu Security Notices (USN)

    • USN-1113-1
    • Postfix vulnerabilities
    • 18 April 2011

Other references