USN-2101-1: libgadu vulnerability

Ubuntu Security Notice USN-2101-1

10th February, 2014

libgadu vulnerability

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

  • Ubuntu 13.10
  • Ubuntu 12.10
  • Ubuntu 12.04 LTS


libgadu could be made to crash or run programs if it received specially crafted network traffic.

Software description

  • libgadu - Gadu-Gadu protocol library


Yves Younan and Ryan Pentney discovered that libgadu incorrectly handled
certain Gadu-Gadu HTTP messages. A malicious remote server or a man in the
middle could use this issue to cause applications using libgadu to crash,
resulting in a denial of service, or possibly execute arbitrary code.

Update instructions

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

Ubuntu 13.10:
libgadu3 1:1.11.2-1ubuntu1.1
Ubuntu 12.10:
libgadu3 1:1.11.2-1ubuntu0.12.10.1
Ubuntu 12.04 LTS:
libgadu3 1:1.11.1-1ubuntu0.1

To update your system, please follow these instructions:

After a standard system update you need to restart your session to make all
the necessary changes.