USN-3758-2: libx11 vulnerabilities

30 August 2018

libx11 vulnerabilities

A security issue affects these releases of Ubuntu and its derivatives:

  • Ubuntu 12.04 ESM

Summary

Several security issues were fixed in libx11.

Software Description

  • 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 ESM
libx11-6 - 2:1.4.99.1-0ubuntu2.4
libx11-dev - 2:1.4.99.1-0ubuntu2.4

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