CVE-2009-2939 Information

Description

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.

Reference

http://www.debian.org/security/2011/dsa-2233 http://www.openwall.com/lists/oss-security/2009/09/18/6