Secunia Security Advisory – Red Hat has issued an update for gdm. This fixes a security issue, which can be exploited by malicious people to potentially bypass certain security restrictions.
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/80926/sa36553.txt
Source: https://packetstormsecurity.com/files/80926/Secunia-Security-Advisory-36553.html