This affected nearly all Linux distributions including Univention Corporate Server. In July 2020 a major defect was detected in GRUB and the Linux kernel:Īttackers can modify the environment before the Linux kernel is fully loaded and can disable secure boot. This technique can be used to prevent boot viruses from infecting the system. Secure Boot builds a chain of trust from the UEFI firmware to the Linux kernel.Īny modification before the Linux kernel gets started is detected and aborts the boot process. Pre-update-checks-4.4.gpg pre-update-checks-4.4 & bash pre-update-checks-4.4 Gpgv -keyring /usr/share/keyrings/univention-archive-key-ucs-5x.gpg \ Prior to the update, this script can be downloaded and executed on the UCS system. Univention provides a script that checks for problems which would prevent the successful update of the system. These tools are installed on all UCS system roles by default. This can be achieved, e.g., using the tools screen and at. If updating should occur over a network connection nevertheless, it must be verified that the update continues in case of disconnection from the network. In consequence, this can affect the system severely. Remote updating via SSH is not recommended as this may result in the update procedure being canceled, e.g., if the network connection is interrupted. The update requires approximately 4 GB additional disk space to download and install the packages, depending on the size of the existing installation.įor the update, a login should be performed on the system's local console as user root, and the update should be initiated there.Īlternatively, the update can be conducted using Univention Management Console. It must be checked whether sufficient disk space is available.Ī standard installation requires a minimum of 10 GB of disk space. Univention Active Directory Connection 6.9. Univention Directory Manager UMC modules and command line interface 6.3.5. Univention Management Console server 6.3.3. Univention Management Console web interface 6.3.2. Listener/Notifier domain replication 6.2.2. Recommended browsers for the access to Univention Management Console 6. Scope of security support for WebKit, Konqueror and QtWebKit 5.4. UCS installation DVD only available for 64 bit 3.
Recommended update order for environments with more than one UCS server 2.2.
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