Secunia Security Advisory – Debian has issued an update for xorg-server. This fixes some vulnerabilities, which can be exploited by malicious, local users to cause a DoS (Denial of Service), disclose potentially sensitive information or to gain escalated privileges.
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/62770/sa28539.txt
Source: https://packetstormsecurity.com/files/62770/Secunia-Security-Advisory-28539.html