xorg-server, xwayland regression
==========================================================================

A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 23.10
- Ubuntu 22.04 LTS
- Ubuntu 20.04 LTS
- Ubuntu 18.04 LTS (Available with Ubuntu Pro)
- Ubuntu 16.04 LTS (Available with Ubuntu Pro)
- Ubuntu 14.04 LTS (Available with Ubuntu Pro)

Summary:

A regression was fixed in X.Org X Server.

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

Ubuntu 20.04 LTS:
xserver-xorg-core 2:1.20.13-1ubuntu1~20.04.17
xwayland 2:1.20.13-1ubuntu1~20.04.17

Ubuntu 18.04 LTS (Available with Ubuntu Pro):
xserver-xorg-core 2:1.19.6-1ubuntu4.15+esm8
xwayland 2:1.19.6-1ubuntu4.15+esm8

Ubuntu 16.04 LTS (Available with Ubuntu Pro):
xserver-xorg-core 2:1.18.4-0ubuntu0.12+esm13
xwayland 2:1.18.4-0ubuntu0.12+esm13

Ubuntu 14.04 LTS (Available with Ubuntu Pro):
xserver-xorg-core 2:1.15.1-0ubuntu2.11+esm12

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

References:
https://ubuntu.com/security/notices/USN-6721-2
https://ubuntu.com/security/notices/USN-6721-1
https://launchpad.net/bugs/2060354

Package Information:
https://launchpad.net/ubuntu/+source/xorg-server/2:21.1.7-3ubuntu2.9
https://launchpad.net/ubuntu/+source/xwayland/2:23.2.0-1ubuntu0.6
https://launchpad.net/ubuntu/+source/xorg-server/2:21.1.4-2ubuntu1.7~22.04.10
https://launchpad.net/ubuntu/+source/xwayland/2:22.1.1-1ubuntu0.13
https://launchpad.net/ubuntu/+source/xorg-server/2:1.20.13-1ubuntu1~20.04.17