tiff - several vulnerabilities

Tavis Ormandy of the Google Security Team discovered several problems
in the TIFF library. The Common Vulnerabilities and Exposures project
identifies the following issues:

• CVE-2006-3459
  Several stack-buffer overflows have been discovered.
• CVE-2006-3460
  A heap overflow vulnerability in the JPEG decoder may overrun a
  buffer with more data than expected.
• CVE-2006-3461
  A heap overflow vulnerability in the PixarLog decoder may allow an
  attacker to execute arbitrary code.
• CVE-2006-3462
  A heap overflow vulnerability has been discovered in the NeXT RLE
  decoder.
• CVE-2006-3463
  An loop was discovered where a 16bit unsigned short was used to
  iterate over a 32bit unsigned value so that the loop would never
  terminate and continue forever.
• CVE-2006-3464
  Multiple unchecked arithmetic operations were uncovered, including
  a number of the range checking operations designed to ensure the
  offsets specified in TIFF directories are legitimate.
• CVE-2006-3465
  A flaw was also uncovered in libtiffs custom tag support which may
  result in abnormal behaviour, crashes, or potentially arbitrary
  code execution.

For the stable distribution (sarge) these problems have been fixed in
version 3.7.2-7.

For the unstable distribution (sid) these problems have been fixed in
version 3.8.2-6.

We recommend that you upgrade your libtiff packages.