USN-6721-2: X.Org X Server regression

Releases

• Ubuntu 23.10
• Ubuntu 22.04 LTS
• Ubuntu 20.04 LTS
• Ubuntu 18.04 ESM
• Ubuntu 16.04 ESM
• Ubuntu 14.04 ESM

Packages

• xorg-server - X.Org X11 server
• xwayland - X server for running X clients under Wayland

Details

USN-6721-1 fixed vulnerabilities in X.Org X Server. That fix was incomplete
resulting in a regression. This update fixes the problem.

We apologize for the inconvenience.

Original advisory details:

It was discovered that X.Org X Server incorrectly handled certain data.
An attacker could possibly use this issue to expose sensitive information.
(CVE-2024-31080, CVE-2024-31081, CVE-2024-31082)

It was discovered that X.Org X Server incorrectly handled certain glyphs.
An attacker could possibly use this issue to cause a crash or expose sensitive
information. (CVE-2024-31083)

Update instructions

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

Ubuntu 23.10

• xserver-xorg-core - 2:21.1.7-3ubuntu2.9
• xwayland - 2:23.2.0-1ubuntu0.6

Ubuntu 22.04

• xserver-xorg-core - 2:21.1.4-2ubuntu1.7~22.04.10
• xwayland - 2:22.1.1-1ubuntu0.13

Ubuntu 20.04

• xserver-xorg-core - 2:1.20.13-1ubuntu1~20.04.17
• xwayland - 2:1.20.13-1ubuntu1~20.04.17

Ubuntu 18.04

• xserver-xorg-core - 2:1.19.6-1ubuntu4.15+esm8
  Available with Ubuntu Pro
• xwayland - 2:1.19.6-1ubuntu4.15+esm8
  Available with Ubuntu Pro

Ubuntu 16.04

• xserver-xorg-core - 2:1.18.4-0ubuntu0.12+esm13
  Available with Ubuntu Pro
• xwayland - 2:1.18.4-0ubuntu0.12+esm13
  Available with Ubuntu Pro

Ubuntu 14.04

• xserver-xorg-core - 2:1.15.1-0ubuntu2.11+esm12
  Available with Ubuntu Pro

After a standard system update you need to restart -APP- to make
all the necessary changes.

References

• https://launchpad.net/bugs/2060354