USN-3758-2: libx11 vulnerabilities

30 August 2018

Several security issues were fixed in libx11.

Releases

Packages

  • libx11 - X11 client-side library

Details

USN-3758-1 fixed several vulnerabilities in libx11. This update provides
the corresponding update for Ubuntu 12.04 ESM.

Original advisory details:

Tobias Stoeckmann discovered that libx11 incorrectly handled certain images.
An attacker could possibly use this issue to access sensitive information
(CVE-2016-7942)

Tobias Stoeckmann discovered that libx11 incorrectly handled certain inputs.
An attacker could possibly use this issue to access sensitive information.
(CVE-2016-7943)

It was discovered that libx11 incorrectly handled certain inputs.
An attacker could possibly use this issue to cause a denial of service.
(CVE-2018-14598, CVE-2018-14599, CVE-2018-14600)

Update instructions

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

Ubuntu 12.04

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