=========================================================================Ubuntu Security Notice USN-1631-1
November 15, 2012

tiff vulnerabilities
=========================================================================
A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 12.10
- Ubuntu 12.04 LTS
- Ubuntu 11.10
- Ubuntu 10.04 LTS
- Ubuntu 8.04 LTS

Summary:

LibTIFF could be made to crash or run programs as your login if it opened a
specially crafted file.

Software Description:
- tiff: Tag Image File Format (TIFF) library

Details:

It was discovered that LibTIFF incorrectly handled certain malformed images
using the PixarLog compression format. If a user or automated system were
tricked into opening a specially crafted TIFF image, a remote attacker
could crash the application, leading to a denial of service, or possibly
execute arbitrary code with user privileges. (CVE-2012-4447)

Huzaifa S. Sidhpurwala discovered that the ppm2tiff tool incorrectly
handled certain malformed PPM images. If a user or automated system were
tricked into opening a specially crafted PPM image, a remote attacker could
crash the application, leading to a denial of service, or possibly execute
arbitrary code with user privileges. (CVE-2012-4564)

Update instructions:

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 12.10:
  libtiff5                        4.0.2-1ubuntu2.1

Ubuntu 12.04 LTS:
  libtiff4                        3.9.5-2ubuntu1.3

Ubuntu 11.10:
  libtiff4                        3.9.5-1ubuntu1.4

Ubuntu 10.04 LTS:
  libtiff4                        3.9.2-2ubuntu0.11

Ubuntu 8.04 LTS:
  libtiff4                        3.8.2-7ubuntu3.14

In general, a standard system update will make all the necessary changes.

References:
  https://ubuntu.com/security/notices/USN-1631-1
  CVE-2012-4447, CVE-2012-4564

Package Information:
  https://launchpad.net/ubuntu/+source/tiff/4.0.2-1ubuntu2.1
  https://launchpad.net/ubuntu/+source/tiff/3.9.5-2ubuntu1.3
  https://launchpad.net/ubuntu/+source/tiff/3.9.5-1ubuntu1.4
  https://launchpad.net/ubuntu/+source/tiff/3.9.2-2ubuntu0.11
  https://launchpad.net/ubuntu/+source/tiff/3.8.2-7ubuntu3.14