USN-5193-3: X.Org X Server vulnerabilities

Releases

• Ubuntu 16.04 ESM

Packages

• xorg-server-hwe-16.04 - X.Org X11 server

Details

USN-5193-1 fixed several vulnerabilities in X.Org. This update provides
the corresponding update for 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

• xserver-xorg-core-hwe-16.04 - 2:1.19.6-1ubuntu4.1~16.04.6+esm5
  Available with Ubuntu Pro

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

References

• CVE-2021-4011
• CVE-2021-4008
• CVE-2021-4009

Related notices

• USN-5193-1: xserver-xephyr-hwe-18.04, xvfb, xdmx-tools, xwayland, xorg-server-hwe-18.04, xserver-common, xserver-xephyr, xserver-xorg-core, xmir, xserver-xorg-dev, xserver-xorg-legacy, xserver-xorg-xmir, xorg-server-source-hwe-18.04, xnest, xserver-xorg-core-hwe-18.04, xserver-xorg-legacy-hwe-18.04, xwayland-hwe-18.04, xorg-server-source, xorg-server, xdmx, xserver-xorg-dev-hwe-18.04
• USN-5193-2: xnest, xserver-common, xserver-xephyr, xserver-xorg-core, xvfb, xorg-server, xmir, xdmx, xdmx-tools, xserver-xorg-dev, xorg-server-source, xserver-xorg-legacy, xwayland, xserver-xorg-xmir