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.
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Ubuntu Security Notice USN-3758-2
August 30, 2018
libx11 vulnerabilities
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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