Univention Corporate Server 3.2 erratum 369 (security)

Multiple security vulnerabilitues have been fixed in qt4-x11:
* Buffer overflow in Harfbuzz extension (CVE-2011-3193).
* Buffer overflow in processing greyscale images (CVE-2011-3194).
* Access to shared memory segments was insufficiently restricted, allowing
  local users to manipulate memory (CVE-2013-0254).
* Denial of service vulnerability in BMP images handler (CVE-2015-0295).
* Segmentation fault and potential remote code execution in Qt BPM handler
  (CVE-2015-1858).
* Segmentation fault and potential remote code execution in Qt ICO handler
  (CVE-2015-1859).
* Segmentation fault and potential remote code execution in Qt GIF handler
  (CVE-2015-1860).