USN-2229-1: GnuTLS vulnerability

2 June 2014

gnutls26 vulnerability

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

  • Ubuntu 14.04 LTS
  • Ubuntu 13.10
  • Ubuntu 12.04 LTS
  • Ubuntu 10.04 LTS


GnuTLS could be made to crash or run programs if it connected to a malicious server.

Software Description

  • gnutls26 - GNU TLS library


Joonas Kuorilehto discovered that GnuTLS incorrectly handled Server Hello messages. A malicious remote server or a man in the middle could use this issue to cause GnuTLS 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 14.04 LTS
libgnutls26 - 2.12.23-12ubuntu2.1
Ubuntu 13.10
libgnutls26 - 2.12.23-1ubuntu4.3
Ubuntu 12.04 LTS
libgnutls26 - 2.12.14-5ubuntu3.8
Ubuntu 10.04 LTS
libgnutls26 - 2.8.5-2ubuntu0.6

To update your system, please follow these instructions:

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