USN-474-1: xscreensaver vulnerability

12 June 2007

xscreensaver vulnerability

Reduce your security exposure

Ubuntu Pro provides ten-year security coverage to 25,000+ packages in Main and Universe repositories, and it is free for up to five machines.

Learn more about Ubuntu Pro

Releases

Details

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.

Reduce your security exposure

Ubuntu Pro provides ten-year security coverage to 25,000+ packages in Main and Universe repositories, and it is free for up to five machines.

Learn more about Ubuntu Pro

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.

References