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USN-474-1: xscreensaver vulnerability

12 June 2007

xscreensaver vulnerability



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.

Update instructions

The problem can be corrected by updating your system to the following package versions:

Ubuntu 7.04
  • xscreensaver - 4.24-5ubuntu2.1
Ubuntu 6.10
  • xscreensaver - 4.24-4ubuntu2.1
Ubuntu 6.06
  • xscreensaver - 4.23-4ubuntu8.1

After a standard system upgrade you need to restart your session to
effect the necessary changes.