The remote host is missing an update to tiff announced via advisory USN-797-1.

The problem can be corrected by upgrading your system to the following package versions: Ubuntu 6.06 LTS: libtiff4 3.7.4-1ubuntu3.4 Ubuntu 8.04 LTS: libtiff4 3.8.2-7ubuntu3.2 Ubuntu 8.10: libtiff4 3.8.2-11ubuntu0.8.10.1 Ubuntu 9.04: libtiff4 3.8.2-11ubuntu0.9.04.1 In general, a standard system upgrade is sufficient to effect the necessary changes. https://secure1.securityspace.com/smysecure/catid.html?in=USN-797-1

It was discovered that the TIFF library did not correctly handle certain malformed TIFF images. If a user or automated system were tricked into processing a malicious image, a remote attacker could cause an application linked against libtiff to crash, leading to a denial of service.