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Ubuntu Security Notice USN-1191-1
August 15, 2011
libxfont vulnerability
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A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 11.04
- Ubuntu 10.10
- Ubuntu 10.04 LTS
Summary:
libXfont could be made to run programs as an administrator if it opened a
specially crafted file.
Software Description:
- libxfont: X11 font rasterisation library
Details:
Tomas Hoger discovered that libXfont incorrectly handled certain malformed
compressed 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.
Update instructions:
The problem can be corrected by updating your system to the following
package versions:
Ubuntu 11.04:
libxfont1 1:1.4.3-2ubuntu0.1
Ubuntu 10.10:
libxfont1 1:1.4.2-1ubuntu0.1
Ubuntu 10.04 LTS:
libxfont1 1:1.4.1-1ubuntu0.1
After a standard system update you need to reboot your computer to make
all the necessary changes.
References:
http://www.ubuntu.com/usn/usn-1191-1
CVE-2011-2895
Package Information:
https://launchpad.net/ubuntu/+source/libxfont/1:1.4.3-2ubuntu0.1
https://launchpad.net/ubuntu/+source/libxfont/1:1.4.2-1ubuntu0.1
https://launchpad.net/ubuntu/+source/libxfont/1:1.4.1-1ubuntu0.1