1. Ubuntu Security Notices
  2. USN-4656-1

USN-4656-1: X.Org X Server vulnerabilities

Publication date

1 December 2020

Overview

Several security issues were fixed in X.Org X Server.

Releases

Packages

Details

Jan-Niklas Sohn discovered that the X.Org X Server XKB extension
incorrectly handled certain inputs. A local attacker could possibly use
this issue to escalate privileges.

Jan-Niklas Sohn discovered that the X.Org X Server XKB extension
incorrectly handled certain inputs. A local attacker could possibly use
this issue to escalate privileges.

Update instructions

After a standard system update you need to reboot your computer to make all the necessary changes.

Learn more about how to get the fixes.

The problem can be corrected by updating your system to the following package versions:

Ubuntu Release Package Version
20.10 groovy xserver-xorg-core –  2:1.20.9-2ubuntu1.1
20.04 focal xserver-xorg-core –  2:1.20.8-2ubuntu2.6
18.04 bionic xserver-xorg-core –  2:1.19.6-1ubuntu4.8
xserver-xorg-core-hwe-18.04 –  2:1.20.8-2ubuntu2.2~18.04.4
16.04 xenial xserver-xorg-core –  2:1.18.4-0ubuntu0.11
xserver-xorg-core-hwe-16.04 –  2:1.19.6-1ubuntu4.1~16.04.5

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References

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