USN-1230-1: Quassel vulnerability

14 October 2011

quassel vulnerability

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

  • Ubuntu 11.04
  • Ubuntu 10.10
  • Ubuntu 10.04 LTS


An unprivileged user could read files in the data and logging directories, including an automatically generated SSL certificate, used by the quasselcore daemon.

Software Description

  • quassel - KDE/Qt-based IRC client


Felix Geyer discovered that the quassel-core post installation script created data and logging directories which were readable by all users. The post installation script also generated a certificate, in the data directory, which was readable by all users.

Update instructions

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

Ubuntu 11.04
quassel-core - 0.7.2-0ubuntu2.3
Ubuntu 10.10
quassel-core - 0.7.1-0ubuntu1.2
Ubuntu 10.04 LTS
quassel-core - 0.6.1-0ubuntu1.3

To update your system, please follow these instructions:

In general, a standard system update will make all the necessary changes.