USN-2127-1: GnuTLS vulnerability

Ubuntu Security Notice USN-2127-1

4th March, 2014

gnutls26 vulnerability

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

  • Ubuntu 13.10
  • Ubuntu 12.10
  • Ubuntu 12.04 LTS
  • Ubuntu 10.04 LTS


Fraudulent security certificates could allow sensitive information to be exposed when accessing the Internet.

Software description

  • gnutls26 - GNU TLS library


Nikos Mavrogiannopoulos discovered that GnuTLS incorrectly handled
certificate verification functions. If a remote attacker were able to
perform a man-in-the-middle attack, this flaw could be exploited with
specially crafted certificates to view sensitive information.

Update instructions

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

Ubuntu 13.10:
libgnutls26 2.12.23-1ubuntu4.2
Ubuntu 12.10:
libgnutls26 2.12.14-5ubuntu4.6
Ubuntu 12.04 LTS:
libgnutls26 2.12.14-5ubuntu3.7
Ubuntu 10.04 LTS:
libgnutls26 2.8.5-2ubuntu0.5

To update your system, please follow these instructions:

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