Ubuntu Security Notices
USN-3758-1

USN-3758-1: libx11 vulnerabilities

Publication date

30 August 2018

Overview

Several security issues were fixed in libx11.

Releases

18.04 LTS 16.04 LTS 14.04 LTS

Packages

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)

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

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

Learn more about how to get the fixes.

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

Ubuntu Release	Package Version
18.04 bionic	libx11-6 – 2:1.6.4-3ubuntu0.1
18.04 bionic	libx11-dev – 2:1.6.4-3ubuntu0.1
16.04 xenial	libx11-6 – 2:1.6.3-1ubuntu2.1
16.04 xenial	libx11-dev – 2:1.6.3-1ubuntu2.1
14.04 trusty	libx11-6 – 2:1.6.2-1ubuntu2.1
14.04 trusty	libx11-dev – 2:1.6.2-1ubuntu2.1

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References

USN-3758-2

USN-3758-2