Secunia Security Advisory – Debian has issued an update for xorg-server. This fixes a vulnerability, which can be exploited by malicious, local users to gain escalated privileges.
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/59206/sa26755.txt
Source: https://packetstormsecurity.com/files/59206/Secunia-Security-Advisory-26755.html