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AUSCERT External Security Bulletin Redistribution
ESB-2022.0377
USN-5193-2: X.Org X Server vulnerabilities
27 January 2022
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AusCERT Security Bulletin Summary
---------------------------------
Product: xorg-server
Publisher: Ubuntu
Operating System: Ubuntu
Impact/Access: Execute Arbitrary Code/Commands -- Existing Account
Increased Privileges -- Existing Account
Denial of Service -- Existing Account
Resolution: Patch/Upgrade
CVE Names: CVE-2021-4011 CVE-2021-4009 CVE-2021-4008
Reference: ESB-2022.0036
ESB-2022.0010
ESB-2021.4332
Original Bulletin:
https://ubuntu.com/security/notices/USN-5193-2
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USN-5193-2: X.Org X Server vulnerabilities
26 January 2022
Several security issues were fixed in X.Org X Server.
Releases
o Ubuntu 16.04 ESM
o Ubuntu 14.04 ESM
Packages
o 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.
Update instructions
The problem can be corrected by updating your system to the following package
versions:
Ubuntu 16.04
o xserver-xorg-core - 2:1.18.4-0ubuntu0.12+esm1
Available with UA Infra or UA Desktop
Ubuntu 14.04
o xserver-xorg-core - 2:1.15.1-0ubuntu2.11+esm5
Available with UA Infra or UA Desktop
After a standard system update you need to reboot your computer to make all
the necessary changes.
References
o CVE-2021-4009
o CVE-2021-4008
o CVE-2021-4011
Related notices
o USN-5193-1 : xserver-xorg-core-hwe-18.04, xorg-server-source,
xwayland-hwe-18.04, xserver-xorg-legacy-hwe-18.04, xserver-xorg-dev,
xserver-xorg-dev-hwe-18.04, xserver-common, xdmx-tools,
xserver-xephyr-hwe-18.04, xserver-xorg-legacy, xmir, xorg-server-hwe-18.04,
xserver-xorg-xmir, xnest, xdmx, xvfb, xserver-xephyr, xserver-xorg-core,
xorg-server-source-hwe-18.04, xorg-server, xwayland
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