Open-Xchange releases UCS Hotfix 2011-09-26

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. The Hotfix is available for all customers with a valid Open-Xchange license.

Fixed Components:
  • FFMpeg-Multimedia-Bibliotheken (CVE-2010-3249 CVE-2010-4704 CVE-2010-4705)
  • Flash-Plugin (CVE-2011-2426 CVE-2011-2427 CVE-2011-2428 CVE-2011-2429 CVE-2011-2430 CVE-2011-2444)

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