gtk+2.0 - security update

Gustavo Grieco discovered different security issues in Gtk+2.0’s
gdk-pixbuf.

• CVE-2015-4491
  Heap overflow when processing BMP images which may allow to execute
  of arbitrary code via malformed images.
• CVE-2015-7673
  Heap overflow when processing TGA images which may allow execute
  arbitrary code or denial of service (process crash) via malformed
  images.
• CVE-2015-7674
  Integer overflow when processing GIF images which may allow to
  execute arbitrary code or denial of service (process crash) via
  malformed image.

For Debian 6 Squeeze, these issues have been fixed in gtk+2.0 version
2.20.1-2+deb6u2. We recommend you to upgrade your gtk+2.0 packages.