Mandriva Linux Security Advisory – A vulnerability was found in gnome-screensaver prior to 2.22.1 when a remote authentication server was enabled. During a network outage, gnome-screensaver would crash upon an unlock attempt, allowing physically local users to gain access to locked sessions. The updated packages have been patched to correct this issue.
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/67997/MDVSA-2008-132.txt
Source: https://packetstormsecurity.com/files/67997/Mandriva-Linux-Security-Advisory-2008-132.html