=========================================================================Ubuntu Security Notice USN-3758-2
August 30, 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
After a standard system update you need to reboot your computer to make
all the necessary changes.
References:
https://ubuntu.com/security/notices/USN-3758-2
https://ubuntu.com/security/notices/USN-3758-1
CVE-2016-7942, CVE-2016-7943, CVE-2018-14598, CVE-2018-14599,
CVE-2018-14600
