The remote host is missing an update to the system as announced in the referenced advisory.
The following package is affected: gnome-screensaver
CVE-2010-0414 gnome-screensaver before 2.28.2 allows physically proximate attackers to bypass screen locking and access an unattended workstation by moving the mouse position to an external monitor and then disconnecting that monitor.
Solution: Update your system with the appropriate patches or software upgrades.