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             AUSCERT External Security Bulletin Redistribution

                USN-5740-1: X.Org X Server vulnerabilities
                             24 November 2022


        AusCERT Security Bulletin Summary

Product:           X.Org X Server
Publisher:         Ubuntu
Operating System:  Ubuntu
Resolution:        Patch/Upgrade
CVE Names:         CVE-2022-3551 CVE-2022-3550 

Original Bulletin: 

Comment: CVSS (Max):  8.8 CVE-2022-3550 (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H)
         CVSS Source: NVD
         Calculator:  https://www.first.org/cvss/calculator/3.1#CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

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USN-5740-1: X.Org X Server vulnerabilities
23 November 2022

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

  o Ubuntu 22.10
  o Ubuntu 22.04 LTS
  o Ubuntu 20.04 LTS
  o Ubuntu 18.04 LTS
  o Ubuntu 16.04 ESM
  o Ubuntu 14.04 ESM


  o xorg-server - X.Org X11 server
  o xorg-server-hwe-16.04 - X.Org X11 server
  o xorg-server-hwe-18.04 - X.Org X11 server
  o xwayland - X server for running X clients under Wayland


It was discovered that X.Org X Server incorrectly handled certain inputs.
An attacker could use these issues to cause the server to crash, resulting
in a denial of service, or possibly execute arbitrary code.

Update instructions

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

Ubuntu 22.10

  o xserver-xorg-core - 2:21.1.4-2ubuntu1.1
  o xwayland - 2:22.1.3-2ubuntu0.1

Ubuntu 22.04

  o xserver-xorg-core - 2:21.1.3-2ubuntu2.3
  o xwayland - 2:22.1.1-1ubuntu0.3

Ubuntu 20.04

  o xserver-xorg-core - 2:1.20.13-1ubuntu1~20.04.4
  o xwayland - 2:1.20.13-1ubuntu1~20.04.4

Ubuntu 18.04

  o xserver-xorg-core - 2:1.19.6-1ubuntu4.12
  o xwayland - 2:1.19.6-1ubuntu4.12
  o xserver-xorg-core-hwe-18.04 - 2:1.20.8-2ubuntu2.2~18.04.8

Ubuntu 16.04

  o xwayland - 2:1.18.4-0ubuntu0.12+esm4
    Available with Ubuntu Pro (Infra-only)
  o xserver-xorg-core - 2:1.18.4-0ubuntu0.12+esm4
    Available with Ubuntu Pro (Infra-only)
  o xserver-xorg-core-hwe-16.04 - 2:1.19.6-1ubuntu4.1~16.04.6+esm3
    Available with Ubuntu Pro (Infra-only)

Ubuntu 14.04

  o xserver-xorg-core - 2:1.15.1-0ubuntu2.11+esm6
    Available with Ubuntu Pro (Infra-only)

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


  o CVE-2022-3550
  o CVE-2022-3551

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