libx11 vulnerabilities

30 August 2018

libx11 vulnerabilities

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

• Ubuntu 18.04 LTS
• Ubuntu 16.04 LTS
• Ubuntu 14.04 LTS

Summary

Several security issues were fixed in libx11.

Software Description

• libx11 - X11 client-side library

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 18.04 LTS

libx11-6 - 2:1.6.4-3ubuntu0.1

libx11-dev - 2:1.6.4-3ubuntu0.1

Ubuntu 16.04 LTS

libx11-6 - 2:1.6.3-1ubuntu2.1

libx11-dev - 2:1.6.3-1ubuntu2.1

Ubuntu 14.04 LTS

libx11-6 - 2:1.6.2-1ubuntu2.1

libx11-dev - 2:1.6.2-1ubuntu2.1

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

• CVE-2016-7942
• CVE-2016-7943
• CVE-2018-14598
• CVE-2018-14599
• CVE-2018-14600