U programskoj biblioteci tiff uočene su dvije sigurnosne ranjivosti. Udaljeni napadači ih mogu iskoristiti za napad uskraćivanjem usluga (eng. Denial of Service) i proizvoljno pokretanje programskog koda s privilegijama korisnika.

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Ubuntu Security Notice USN-1416-1
April 04, 2012

tiff vulnerabilities
==========================================================================

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

- Ubuntu 11.10
- Ubuntu 11.04
- Ubuntu 10.10
- Ubuntu 10.04 LTS
- Ubuntu 8.04 LTS

Summary:

The TIFF library 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:

Alexander Gavrun discovered that the TIFF library incorrectly allocated
space for a tile. If a user or automated system were tricked into opening a
specially crafted TIFF image, a remote attacker could execute arbitrary
code with user privileges, or crash the application, leading to a denial of
service. (CVE-2012-1173)

It was discovered that the tiffdump utility incorrectly handled directory
data structures with many directory entries. 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. This issue only applied to
Ubuntu 8.04 LTS, Ubuntu 10.04 LTS, Ubuntu 10.10 and Ubuntu 11.04.
(CVE-2010-4665)

Update instructions:

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

Ubuntu 11.10:
  libtiff4                        3.9.5-1ubuntu1.1

Ubuntu 11.04:
  libtiff4                        3.9.4-5ubuntu6.1

Ubuntu 10.10:
  libtiff4                        3.9.4-2ubuntu0.5

Ubuntu 10.04 LTS:
  libtiff4                        3.9.2-2ubuntu0.8

Ubuntu 8.04 LTS:
  libtiff4                        3.8.2-7ubuntu3.10

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

References:
  http://www.ubuntu.com/usn/usn-1416-1
  CVE-2010-4665, CVE-2012-1173

Package Information:
  https://launchpad.net/ubuntu/+source/tiff/3.9.5-1ubuntu1.1
  https://launchpad.net/ubuntu/+source/tiff/3.9.4-5ubuntu6.1
  https://launchpad.net/ubuntu/+source/tiff/3.9.4-2ubuntu0.5
  https://launchpad.net/ubuntu/+source/tiff/3.9.2-2ubuntu0.8
  https://launchpad.net/ubuntu/+source/tiff/3.8.2-7ubuntu3.10