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USN-2078-1: libXfont vulnerability

7 January 2014

libXfont could be made to crash or run programs as an administrator if it opened a specially crafted font file.



  • libxfont - X11 font rasterisation library


It was discovered that libXfont incorrectly handled certain malformed BDF
fonts. An attacker could use a specially crafted font file to cause
libXfont to crash, or possibly execute arbitrary code in order to gain
privileges. The default compiler options for affected releases should
reduce the vulnerability to a denial of service.

Update instructions

The problem can be corrected by updating your system to the following package versions:

Ubuntu 13.10
Ubuntu 13.04
Ubuntu 12.10
Ubuntu 12.04
Ubuntu 10.04

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