Secunia Security Advisory – Ubuntu has issued an update for gnome-screensaver. This fixes a weakness and a security issue, which can be exploited by malicious people with physical access to disclose potentially sensitive information or bypass certain security restrictions.
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/71905/sa32691.txt
Source: https://packetstormsecurity.com/files/71905/Secunia-Security-Advisory-32691.html