Secunia Security Advisory – Victor Daniel has reported a vulnerability in GNOME Display Manager (GDM), which can be exploited by malicious, local users to bypass certain security restrictions.
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/47133/sa20532.txt
Source: https://packetstormsecurity.com/files/47133/Secunia-Security-Advisory-20532.html