[USN-2939-1] LibTIFF vulnerabilities

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==========================================================================
Ubuntu Security Notice USN-2939-1
March 23, 2016

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

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

- Ubuntu 15.10
- Ubuntu 14.04 LTS
- Ubuntu 12.04 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. If a user or automated system were tricked into opening a specially
crafted image, a remote attacker could crash the application, leading to a
denial of service, or possibly execute arbitrary code with user privileges.

Update instructions:

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

Ubuntu 15.10:
libtiff5 4.0.3-12.3ubuntu2.1

Ubuntu 14.04 LTS:
libtiff5 4.0.3-7ubuntu0.4

Ubuntu 12.04 LTS:
libtiff4 3.9.5-2ubuntu1.9

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

References:
http://www.ubuntu.com/usn/usn-2939-1
CVE-2015-8665, CVE-2015-8683, CVE-2015-8781, CVE-2015-8782,
CVE-2015-8783, CVE-2015-8784

Package Information:
https://launchpad.net/ubuntu/+source/tiff/4.0.3-12.3ubuntu2.1
https://launchpad.net/ubuntu/+source/tiff/4.0.3-7ubuntu0.4
https://launchpad.net/ubuntu/+source/tiff/3.9.5-2ubuntu1.9