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Ubuntu 16.04 ESM: USN-5193-2 Critical: X.Org Denial of Service Advisory

ubuntu
Calendar Grey January 26, 2022
Dist Ubuntu Esm H88
Information regarding X.Org X Server security flaws resolved in Ubuntu as of January 26, 2022. Guidance for updating packages provided.
Several security issues were fixed in X.Org X Server.

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.

Topics%20covered

Topics Covered

security advisory denial of service ubuntu server update xorg

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

Severity
critical
Lowest
Low
Medium
High
Critical

January 26, 2022

Topics%20covered

Topics Covered

security advisory denial of service ubuntu server update xorg

Package Information

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