Mandriva Linux Security Advisory 2011-093 - gnome-screensaver 2.14.3, 2.22.2, 2.27.x, 2.28.0, and 2.28.3, when the X configuration enables the extend screen option, allows physically proximate attackers to bypass screen locking, access an unattended workstation, and view half of the GNOME desktop by attaching an external monitor. The updated packages have been patched to correct this issue.
133358eb9b1e3342049c27a40590ee8e54c1d3400f66cf8890d620267994722f
Ubuntu Security Notice 907-1 - It was discovered that gnome-screensaver did not correctly lock all screens when monitors get hotplugged. An attacker with physical access could use this flaw to gain access to a locked session. It was discovered that gnome-screensaver did not correctly handle keyboard grab when monitors get hotplugged. An attacker with physical access could use this flaw to gain access to a locked session. This issue only affected Ubuntu 9.10.
474f008855ca7ea10ad00cea2ab2639b40a6f9d2afb20ec01fb138953ff5bd4b