USN-3456-1: X.Org X server vulnerabilities
Ubuntu Security Notice USN-3456-1
17th October, 2017
xorg-server, xorg-server-hwe-16.04, xorg-server-lts-xenial vulnerabilities
A security issue affects these releases of Ubuntu and its
derivatives:
- Ubuntu 17.04
- Ubuntu 16.04 LTS
- Ubuntu 14.04 LTS
Summary
Several security issues were fixed in the X.Org X server.
Software description
- xorg-server
– X.Org X11 server - xorg-server-hwe-16.04
– X.Org X11 server - xorg-server-lts-xenial
– X.Org X11 server
Details
It was discovered that the X.Org X server incorrectly handled certain
lengths. An attacker able to connect to an X server, either locally or
remotely, could use these issues to crash the server, or possibly execute
arbitrary code.
Update instructions
The problem can be corrected by updating your system to the following
package version:
- Ubuntu 17.04:
-
xserver-xorg-core
2:1.19.3-1ubuntu1.3
- Ubuntu 16.04 LTS:
-
xserver-xorg-core
2:1.18.4-0ubuntu0.7
-
xserver-xorg-core-hwe-16.04
2:1.19.3-1ubuntu1~16.04.4
- Ubuntu 14.04 LTS:
-
xserver-xorg-core
2:1.15.1-0ubuntu2.11
-
xserver-xorg-core-lts-xenial
2:1.18.3-1ubuntu2.3~trusty4
To update your system, please follow these instructions:
https://wiki.ubuntu.com/Security/Upgrades.
After a standard system update you need to reboot your computer to make
all the necessary changes.
References
Source: USN-3456-1: X.Org X server vulnerabilities
