libungif4 - several

Chris Evans discovered several security related problems in libungif4,
a shared library for GIF images. The Common Vulnerabilities and
Exposures project identifies the following vulnerabilities:

• CVE-2005-2974
  Null pointer dereference, that could cause a denial of service.
• CVE-2005-3350
  Out of bounds memory access that could cause a denial of service
  or the execution of arbitrary code.

For the old stable distribution (woody) these problems have been fixed in
version 4.1.0b1-2woody1.

For the stable distribution (sarge) these problems have been fixed in
version 4.1.3-2sarge1.

For the unstable distribution (sid) these problems will be fixed soon.

We recommend that you upgrade your libungif4 packages.