It was discovered that the imagetops filter in cups, the Common UNIX Printing System, is prone to an integer overflow when reading malicious TIFF images. For the stable distribution , this problem has been fixed in version 1.3.8-1lenny5. For the oldstable distribution , this problem has been fixed in version 1.2.7-4etch7. For the testing distribution and the unstable distribution , this problem will be fixed soon. We recommend that you upgrade your cups packages.