Ubuntu Update for tiff vulnerability USN-639-1

Summary
Ubuntu Update for Linux kernel vulnerabilities USN-639-1
Solution
Please Install the Updated Packages.
Insight
Drew Yao discovered that the TIFF library did not correctly validate LZW compressed TIFF images. If a user or automated system were tricked into processing a malicious image, a remote attacker could execute arbitrary code or cause an application linked against libtiff to crash, leading to a denial of service.
Affected
tiff vulnerability on Ubuntu 6.06 LTS , Ubuntu 7.04 , Ubuntu 7.10 , Ubuntu 8.04 LTS