This release provides a security update of Univention Corporate Server 2.4 which is integrated at Open-Xchange Advanced Server Edition and Open-Xchange Server Edition for UCS. We encourage administrators to install this update.

Fixed Components:
- Firefox (CVE-2011-3647 CVE-2011-3648 CVE-2011-3650)
- Linux-Kernel 2.6.32 (CVE-2011-1020 CVE-2011-1161 CVE-2011-1162 CVE-2011-2183 CVE-2011-2203 CVE-2011-2213 CVE-2011-2484 CVE-2011-2491 CVE-2011-2492 CVE-2011-2494 CVE-2011-2495 CVE-2011-2497 CVE-2011-2517 CVE-2011-2525 CVE-2011-2699 CVE-2011-2700 CVE-2011-2723 CVE-2011-2898 CVE-2011-2905 CVE-2011-2909 CVE-2011-2918 CVE-2011-2928 CVE-2011-3188 CVE-2011-3191 CVE-2011-3353 CVE-2011-4110 CVE-2011-4127 CVE-2011-4132 CVE-2011-4326 CVE-2011-4330 CVE-2012-0038)
- OpenSSL (CVE-2011-1945 CVE-2011-4108 CVE-2011-4109 CVE-2011-4354 CVE-2011-4576 CVE-2011-4619 CVE-2012-0050)

Installation of this Hotfix Release:
It is necessary to activate the installation of Hotfixes. Please note the following step at

The system can be updated as usual for UCS using the univention-updater net command or the UMC module Online Update.
  • Please enter your username/password first under the component called „OX" and activate it.
  • In the online-updates module of UMC, under Release information, there is provided the new update
  • Click on "Install this update"
  • Reboot