Ubuntu Update for xscreensaver vulnerability USN-474-1

Summary
Ubuntu Update for Linux kernel vulnerabilities USN-474-1
Solution
Please Install the Updated Packages.
Insight
It was discovered that xscreensaver did not correctly validate the return values from network authentication systems such as LDAP or NIS. A local attacker could bypass a locked screen if they were able to interrupt network connectivity.
Affected
xscreensaver vulnerability on Ubuntu 6.06 LTS , Ubuntu 6.10 , Ubuntu 7.04
References