USN-769-1: libwmf vulnerability

4 May 2009

libwmf vulnerability

A security issue affects these releases of Ubuntu and its derivatives:

  • Ubuntu 9.04
  • Ubuntu 8.10
  • Ubuntu 8.04 LTS
  • Ubuntu 6.06 LTS

Software Description

  • libwmf


Tavis Ormandy discovered that libwmf incorrectly used memory after it had been freed when using its embedded GD library. If a user or automated system were tricked into opening a crafted WMF file, an attacker could cause a denial of service or execute arbitrary code with privileges of the user invoking the program.

Update instructions

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

Ubuntu 9.04
libwmf0.2-7 -
Ubuntu 8.10
libwmf0.2-7 -
Ubuntu 8.04 LTS
libwmf0.2-7 -
Ubuntu 6.06 LTS
libwmf0.2-7 -

To update your system, please follow these instructions:

In general, a standard system upgrade is sufficient to effect the necessary changes.