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Ubuntu Security Notice USN-7085-1

Ubuntu Security Notice 7085-1 - Jan-Niklas Sohn discovered that the X.Org X Server incorrectly handled certain memory operations in the X Keyboard Extension. An attacker could use this issue to cause the X Server to crash, leading to a denial of service, or possibly execute arbitrary code.

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Ubuntu Security Notice USN-7085-1
October 30, 2024

xorg-server, xwayland vulnerability

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

  • Ubuntu 24.10
  • Ubuntu 24.04 LTS
  • Ubuntu 22.04 LTS
  • Ubuntu 20.04 LTS

Summary:

X.Org X Server could be made to crash or run programs if it received
specially crafted data.

Software Description:

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

Details:

Jan-Niklas Sohn discovered that the X.Org X Server incorrectly handled
certain memory operations in the X Keyboard Extension. An attacker could
use this issue to cause the X Server to crash, leading to a denial of
service, or possibly execute arbitrary code.

Update instructions:

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

Ubuntu 24.10
xserver-xorg-core 2:21.1.13-2ubuntu1.1
xwayland 2:24.1.2-1ubuntu0.1

Ubuntu 24.04 LTS
xserver-xorg-core 2:21.1.12-1ubuntu1.1
xwayland 2:23.2.6-1ubuntu0.1

Ubuntu 22.04 LTS
xserver-xorg-core 2:21.1.4-2ubuntu1.7~22.04.12
xwayland 2:22.1.1-1ubuntu0.14

Ubuntu 20.04 LTS
xserver-xorg-core 2:1.20.13-1ubuntu1~20.04.18
xwayland 2:1.20.13-1ubuntu1~20.04.18

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

References:
https://ubuntu.com/security/notices/USN-7085-1
CVE-2024-9632

Package Information:
https://launchpad.net/ubuntu/+source/xorg-server/2:21.1.13-2ubuntu1.1
https://launchpad.net/ubuntu/+source/xwayland/2:24.1.2-1ubuntu0.1
https://launchpad.net/ubuntu/+source/xorg-server/2:21.1.12-1ubuntu1.1
https://launchpad.net/ubuntu/+source/xwayland/2:23.2.6-1ubuntu0.1
https://launchpad.net/ubuntu/+source/xorg-server/2:21.1.4-2ubuntu1.7~22.04.12
https://launchpad.net/ubuntu/+source/xwayland/2:22.1.1-1ubuntu0.14
https://launchpad.net/ubuntu/+source/xorg-server/2:1.20.13-1ubuntu1~20.04.18

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Ubuntu Security Notice USN-7085-2

Ubuntu Security Notice 7085-2 - USN-7085-1 fixed a vulnerability in X.Org. This update provides the corresponding update for Ubuntu 16.04 LTS and Ubuntu 18.04 LTS. Jan-Niklas Sohn discovered that the X.Org X Server incorrectly handled certain memory operations in the X Keyboard Extension. An attacker could use this issue to cause the X Server to crash, leading to a denial of service, or possibly execute arbitrary code.

Debian Security Advisory 5800-1

Debian Linux Security Advisory 5800-1 - Jan-Niklas Sohn discovered that a heap-based buffer overflow in the _XkbSetCompatMap function in the X Keyboard Extension of the X.org X server may result in privilege escalation if the X server is running privileged.

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