USN-517-1: kdm vulnerability

25 September 2007

kdebase vulnerability

A security issue affects these releases of Ubuntu and its derivatives:

  • Ubuntu 7.04
  • Ubuntu 6.10
  • Ubuntu 6.06 LTS

Software Description

  • kdebase


It was discovered that KDM would allow logins without password checks under certain circumstances. If autologin was configured, and “shutdown with password” enabled, a local user could exploit the problem and gain root privileges.

Update instructions

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

Ubuntu 7.04
kdm - 4:3.5.6-0ubuntu20.4
Ubuntu 6.10
kdm - 4:3.5.5-0ubuntu3.6
Ubuntu 6.06 LTS
kdm - 4:3.5.2-0ubuntu27.2

To update your system, please follow these instructions:

In general, a standard system upgrade is sufficient to effect the necessary changes.