========================================================================== Ubuntu Security Notice USN-5193-2 January 26, 2022
xorg-server vulnerabilities ========================================================================== A security issue affects these releases of Ubuntu and its derivatives: - Ubuntu 16.04 ESM - Ubuntu 14.04 ESM Summary: Several security issues were fixed in X.Org X Server. Software Description: - xorg-server: X.Org X11 server Details: USN-5193-1 fixed several vulnerabilities in X.Org. This update provides the corresponding update for Ubuntu 14.04 ESM and Ubuntu 16.04 ESM. Original advisory details: Jan-Niklas Sohn discovered that the X.Org X Server incorrectly handled certain inputs. An attacker could use this issue to cause the server to crash, resulting in a denial of service, or possibly execute arbitrary code and escalate privileges. Update instructions: The problem can be corrected by updating your system to the following package versions: Ubuntu 16.04 ESM: xserver-xorg-core 2:1.18.4-0ubuntu0.12+esm1 Ubuntu 14.04 ESM: xserver-xorg-core 2:1.15.1-0ubuntu2.11+esm5 After a standard system update you need to reboot your computer to make all the necessary changes. References: https://ubuntu.com/security/notices/USN-5193-2 https://ubuntu.com/security/notices/USN-5193-1 CVE-2021-4008, CVE-2021-4009, CVE-2021-4011
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