USN-3442-1: libXfont vulnerabilities

Publication date

10 October 2017

Overview

Several security issues were fixed in libXfont.


Packages

Details

It was discovered that libXfont incorrectly handled certain patterns in
PatternMatch. A local attacker could use this issue to cause libXfont to
crash, resulting in a denial of service, or possibly obtain sensitive
information. (CVE-2017-13720)

It was discovered that libXfont incorrectly handled certain malformed PCF
files. A local attacker could use this issue to cause libXfont to crash,
resulting in a denial of service, or possibly obtain sensitive information.
(CVE-2017-13722)

It was discovered that libXfont incorrectly handled certain patterns in
PatternMatch. A local attacker could use this issue to cause libXfont to
crash, resulting in a denial of service, or possibly obtain sensitive
information. (CVE-2017-13720)

It was discovered that libXfont incorrectly handled certain malformed PCF
files. A local attacker could use this issue to cause libXfont to crash,
resulting in a denial of service, or possibly obtain sensitive information.
(CVE-2017-13722)

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
17.04 zesty libxfont1 –  1:1.5.2-4ubuntu0.1
libxfont2 –  1:2.0.1-3ubuntu0.1
16.04 xenial libxfont1 –  1:1.5.1-1ubuntu0.16.04.3
libxfont2 –  1:2.0.1-3~ubuntu16.04.2
14.04 trusty libxfont1 –  1:1.4.7-1ubuntu0.3

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