USN-2304-1: KDE-Libs vulnerability

31 July 2014

kde4libs vulnerability

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

  • Ubuntu 14.04 LTS
  • Ubuntu 12.04 LTS


kauth could be tricked into bypassing polkit authorizations.

Software Description

  • kde4libs - KDE 4 core applications and libraries


It was discovered that kauth was using polkit in an unsafe manner. A local attacker could possibly use this issue to bypass intended polkit authorizations.

Update instructions

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

Ubuntu 14.04 LTS
kdelibs5-plugins - 4:4.13.2a-0ubuntu0.3
Ubuntu 12.04 LTS
kdelibs5-plugins - 4:4.8.5-0ubuntu0.4

To update your system, please follow these instructions:

After a standard system update you need to reboot your computer to make all the necessary changes.