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/67291/sa30666.txt
Source: https://packetstormsecurity.com/files/67291/Secunia-Security-Advisory-30666.html