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Ubuntu Security Notice USN-1028-1 December 07, 2010
imagemagick vulnerability
CVE-2010-4167
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A security issue affects the following Ubuntu releases:

Ubuntu 8.04 LTS
Ubuntu 9.10
Ubuntu 10.04 LTS
Ubuntu 10.10

This advisory also applies to the corresponding versions of
Kubuntu, Edubuntu, and Xubuntu.

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

Ubuntu 8.04 LTS:
imagemagick 7:6.3.7.9.dfsg1-2ubuntu1.2

Ubuntu 9.10:
imagemagick 7:6.5.1.0-1.1ubuntu3.1

Ubuntu 10.04 LTS:
imagemagick 7:6.5.7.8-1ubuntu1.1

Ubuntu 10.10:
imagemagick 7:6.6.2.6-1ubuntu1.1

In general, a standard system update will make all the necessary changes.

Details follow:

It was discovered that ImageMagick would search for configuration files in
the current directory. If a user were tricked into opening or processing an
image in an arbitrary directory, a local attacker could execute arbitrary
code with the user's privileges.