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Ubuntu Security Notice USN-3758-2

Ubuntu Security Notice USN-3758-2
Posted Aug 30, 2018
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 3758-2 - USN-3758-1 fixed several vulnerabilities in libx11. This update provides the corresponding update for Ubuntu 12.04 ESM. Tobias Stoeckmann discovered that libx11 incorrectly handled certain images. An attacker could possibly use this issue to access sensitive information Various other issues were also addressed.

tags | advisory, vulnerability
systems | linux, ubuntu
advisories | CVE-2016-7942, CVE-2016-7943, CVE-2018-14600
MD5 | b14e615638a1467f6f7b8dc4eb9cbeb3

Ubuntu Security Notice USN-3758-2

Change Mirror Download
==========================================================================
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://usn.ubuntu.com/usn/usn-3758-2
https://usn.ubuntu.com/usn/usn-3758-1
CVE-2016-7942, CVE-2016-7943, CVE-2018-14598, CVE-2018-14599,
CVE-2018-14600

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