USN-3442-1: libXfont vulnerabilities
Ubuntu Security Notice USN-3442-1
10th October, 2017
libxfont, libxfont1, libxfont2 vulnerabilities
A security issue affects these releases of Ubuntu and its
derivatives:
- Ubuntu 17.04
- Ubuntu 16.04 LTS
- Ubuntu 14.04 LTS
Summary
Several security issues were fixed in libXfont.
Software description
- libxfont
– X11 font rasterisation library - libxfont1
– X11 font rasterisation library - libxfont2
– X11 font rasterisation library
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)
Update instructions
The problem can be corrected by updating your system to the following
package version:
- Ubuntu 17.04:
-
libxfont1
1:1.5.2-4ubuntu0.1
-
libxfont2
1:2.0.1-3ubuntu0.1
- Ubuntu 16.04 LTS:
-
libxfont1
1:1.5.1-1ubuntu0.16.04.3
-
libxfont2
1:2.0.1-3~ubuntu16.04.2
- Ubuntu 14.04 LTS:
-
libxfont1
1:1.4.7-1ubuntu0.3
To update your system, please follow these instructions:
https://wiki.ubuntu.com/Security/Upgrades.
After a standard system update you need to reboot your computer to make
all the necessary changes.
References
Source: USN-3442-1: libXfont vulnerabilities
