USN-2559-1: Libtasn1 vulnerability

8 April 2015

libtasn1-3, libtasn1-6 vulnerability

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

  • Ubuntu 14.10
  • Ubuntu 14.04 LTS
  • Ubuntu 12.04 LTS
  • Ubuntu 10.04 LTS


Libtasn1 could be made to crash or run programs if it processed specially crafted data.

Software Description

  • libtasn1-6 - Library to manage ASN.1 structures
  • libtasn1-3 - Library to manage ASN.1 structures


Hanno Böck discovered that Libtasn1 incorrectly handled certain ASN.1 data. A remote attacker could possibly exploit this with specially crafted ASN.1 data and cause applications using Libtasn1 to crash, resulting in a denial of service, or possibly execute arbitrary code.

Update instructions

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

Ubuntu 14.10
libtasn1-6 - 4.0-2ubuntu0.1
Ubuntu 14.04 LTS
libtasn1-6 - 3.4-3ubuntu0.2
Ubuntu 12.04 LTS
libtasn1-3 - 2.10-1ubuntu1.3
Ubuntu 10.04 LTS
libtasn1-3 - 2.4-1ubuntu0.3

To update your system, please follow these instructions:

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