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=========================================================== Ubuntu Security Notice USN-537-1 October 23, 2007 gnome-screensaver vulnerability CVE-2007-3920 =========================================================== A security issue affects the following Ubuntu releases: Ubuntu 7.10 This advisory also applies to the corresponding versions of Kubuntu, Edubuntu, and Xubuntu. The problem can be corrected by upgrading your system to the following package versions: Ubuntu 7.10: gnome-screensaver 2.20.0-0ubuntu4.2 After a standard system upgrade you need to restart your session to effect the necessary changes. Details follow: Jens Askengren discovered that gnome-screensaver became confused when running under Compiz, and could lose keyboard lock focus. A local attacker could exploit this to bypass the user's locked screen saver.