USN-2865-1: GnuTLS vulnerability

08 January 2016

GnuTLS could be made to expose sensitive information over the network.



  • gnutls26 - GNU TLS library
  • gnutls28 - GNU TLS library


Karthikeyan Bhargavan and Gaetan Leurent discovered that GnuTLS incorrectly
allowed MD5 to be used for TLS 1.2 connections. If a remote attacker were
able to perform a man-in-the-middle attack, this flaw could be exploited to
view sensitive information.

Update instructions

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

Ubuntu 15.04
Ubuntu 14.04
Ubuntu 12.04

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


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