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Ubuntu Security Notice USN-2898-1
February 15, 2016

gtk+2.0, gtk+3.0 vulnerability
============================================================================

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

- Ubuntu 15.10
- Ubuntu 14.04 LTS
- Ubuntu 12.04 LTS

Summary:

GTK+ could be made to crash or run programs as your login if it processed a
specially crafted image.

Software Description:
- gtk+2.0: GTK+ graphical user interface library
- gtk+3.0: GTK+ graphical user interface library

Details:

It was discovered that GTK+ incorrectly handled certain large images. A
remote attacker could use this issue to cause GTK+ applications 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 versions:

Ubuntu 15.10:
  libgtk2.0-0                     2.24.28-1ubuntu1.1

Ubuntu 14.04 LTS:
  libgtk2.0-0                     2.24.23-0ubuntu1.4

Ubuntu 12.04 LTS:
  libgtk-3-0                      3.4.2-0ubuntu0.9
  libgtk2.0-0                     2.24.10-0ubuntu6.3

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

References:
  http://www.ubuntu.com/usn/usn-2898-1
  CVE-2013-7447

Package Information:
  https://launchpad.net/ubuntu/+source/gtk+2.0/2.24.28-1ubuntu1.1
  https://launchpad.net/ubuntu/+source/gtk+2.0/2.24.23-0ubuntu1.4
  https://launchpad.net/ubuntu/+source/gtk+2.0/2.24.10-0ubuntu6.3
  https://launchpad.net/ubuntu/+source/gtk+3.0/3.4.2-0ubuntu0.9