Debian Security Advisory 1040-1: A vulnerability has been identified in gdm, a display manager for X, that could allow a local attacker to gain elevated privileges by exploiting a race condition in the handling of the .ICEauthority file.
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/45692/dsa-1040-1.txt
Source: https://packetstormsecurity.com/files/45692/Debian-Linux-Security-Advisory-1040-1.html