[USN-5193-3] X.Org X Server vulnerabilities
Leonids S. Barbosa
leo.barbosa at canonical.com
Thu Jul 27 10:18:42 UTC 2023
Ubuntu Security Notice USN-5193-3
July 27, 2023
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 16.04 LTS (Available with Ubuntu Pro)
Several security issues were fixed in X.Org X Server.
- xorg-server-hwe-16.04: X.Org X11 server
USN-5193-1 fixed several vulnerabilities in X.Org. This update provides
the corresponding update for 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.
The problem can be corrected by updating your system to the following
Ubuntu 16.04 LTS (Available with Ubuntu Pro):
After a standard system update you need to reboot your computer to make all
the necessary changes.
CVE-2021-4008, CVE-2021-4009, CVE-2021-4011
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