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Ubuntu Security Notice USN-3758-1

Ubuntu Security Notice USN-3758-1
Posted Aug 30, 2018
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 3758-1 - Tobias Stoeckmann discovered that libx11 incorrectly handled certain images. An attacker could possibly use this issue to access sensitive information Tobias Stoeckmann discovered that libx11 incorrectly handled certain inputs. An attacker could possibly use this issue to access sensitive information. It was discovered that libx11 incorrectly handled certain inputs. An attacker could possibly use this issue to cause a denial of service. Various other issues were also addressed.

tags | advisory, denial of service
systems | linux, ubuntu
advisories | CVE-2016-7942, CVE-2016-7943, CVE-2018-14600
MD5 | eaaab049ba11b535eec18ba97edb480d

Ubuntu Security Notice USN-3758-1

Change Mirror Download
==========================================================================
Ubuntu Security Notice USN-3758-1
August 30, 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

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

References:
https://usn.ubuntu.com/usn/usn-3758-1
CVE-2016-7942, CVE-2016-7943, CVE-2018-14598, CVE-2018-14599,
CVE-2018-14600

Package Information:
https://launchpad.net/ubuntu/+source/libx11/2:1.6.4-3ubuntu0.1
https://launchpad.net/ubuntu/+source/libx11/2:1.6.3-1ubuntu2.1
https://launchpad.net/ubuntu/+source/libx11/2:1.6.2-1ubuntu2.1

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