USN-2427-1: Libksba vulnerability

27 November 2014

libksba vulnerability

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

  • Ubuntu 14.10
  • Ubuntu 14.04 LTS
  • Ubuntu 12.04 LTS


Libksba could be made to crash or run programs if it opened a specially crafted file.

Software Description

  • libksba - X.509 and CMS support library


Hanno Böck discovered that Libksba incorrectly handled certain S/MIME messages or ECC based OpenPGP data. An attacker could use this issue to cause Libksba 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
libksba8 - 1.3.0-3ubuntu0.14.10.1
Ubuntu 14.04 LTS
libksba8 - 1.3.0-3ubuntu0.14.04.1
Ubuntu 12.04 LTS
libksba8 - 1.2.0-2ubuntu0.1

To update your system, please follow these instructions:

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