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:
- Oracle Java (CVE-2011-0862 CVE-2011-0873 CVE-2011-0815 CVE-2011-0817 CVE-2011-0863 CVE-2011-0864 CVE-2011-0802 CVE-2011-0814 CVE-2011-0871 CVE-2011-0786 CVE-2011-0788 CVE-2011-0866 CVE-2011-0868 CVE-2011-0872 CVE-2011-0867 CVE-2011-0869 CVE-2011-0865)

Installation of this PTF:
Please note: 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