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/93226/sa41139.txt
Source: https://packetstormsecurity.com/files/93226/Secunia-Security-Advisory-41139.html