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==========================================================================
Ubuntu Security Notice USN-2957-1
May 02, 2016

libtasn1-3, libtasn1-6 vulnerability
==========================================================================

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

- Ubuntu 15.10
- Ubuntu 14.04 LTS
- Ubuntu 12.04 LTS

Summary:

Libtasn1 could be made to hang if it processed specially crafted data.

Software Description:
- libtasn1-6: Library to manage ASN.1 structures
- libtasn1-3: Library to manage ASN.1 structures

Details:

Pascal Cuoq and Miod Vallat discovered that Libtasn1 incorrectly handled
certain malformed DER certificates. A remote attacker could possibly use
this issue to cause applications using Libtasn1 to hang, resulting in a
denial of service.

Update instructions:

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

Ubuntu 15.10:
  libtasn1-6                      4.5-2ubuntu0.1

Ubuntu 14.04 LTS:
  libtasn1-6                      3.4-3ubuntu0.4

Ubuntu 12.04 LTS:
  libtasn1-3                      2.10-1ubuntu1.5

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

References:
  http://www.ubuntu.com/usn/usn-2957-1
  CVE-2016-4008

Package Information:
  https://launchpad.net/ubuntu/+source/libtasn1-6/4.5-2ubuntu0.1
  https://launchpad.net/ubuntu/+source/libtasn1-6/3.4-3ubuntu0.4
  https://launchpad.net/ubuntu/+source/libtasn1-3/2.10-1ubuntu1.5



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