tiff - heap overflows

Several problems have been discovered in libtiff, the Tag Image File
Format library for processing TIFF graphics files. An attacker could
prepare a specially crafted TIFF graphic that would cause the client
to execute arbitrary code or crash. The Common Vulnerabilities and
Exposures Project has identified the following problems:

• CAN-2004-0803
  Chris Evans discovered several problems in the RLE (run length
  encoding) decoders that could lead to arbitrary code execution.
• CAN-2004-0804
  Matthias Clasen discovered a division by zero through an integer
  overflow.
• CAN-2004-0886
  Dmitry V. Levin discovered several integer overflows that caused
  malloc issues which can result to either plain crash or memory
  corruption.

For the stable distribution (woody) these problems have been fixed in
version 3.5.5-6woody1.

For the unstable distribution (sid) these problems have been fixed in
version 3.6.1-2.

We recommend that you upgrade your libtiff package.