[USN-2821-1] GnuTLS vulnerability

[Marc Deslauriers]

==========================================================================
Ubuntu Security Notice USN-2821-1
November 30, 2015

gnutls26 vulnerability
==========================================================================

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

- Ubuntu 14.04 LTS
- Ubuntu 12.04 LTS

Summary:

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

Software Description:
- gnutls26: GNU TLS library

Details:

It was discovered that GnuTLS incorrectly validated the first byte of
padding in CBC modes. A remote attacker could possibly use this issue to
perform a padding oracle attack.

Update instructions:

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

Ubuntu 14.04 LTS:
  libgnutls26                     2.12.23-12ubuntu2.3

Ubuntu 12.04 LTS:
  libgnutls26                     2.12.14-5ubuntu3.10

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

References:
  http://www.ubuntu.com/usn/usn-2821-1
  https://launchpad.net/bugs/1510163

Package Information:
  https://launchpad.net/ubuntu/+source/gnutls26/2.12.23-12ubuntu2.3
  https://launchpad.net/ubuntu/+source/gnutls26/2.12.14-5ubuntu3.10


-------------- next part --------------
A non-text attachment was scrubbed...
Name: signature.asc
Type: application/pgp-signature
Size: 819 bytes
Desc: OpenPGP digital signature
URL: <https://lists.ubuntu.com/archives/ubuntu-security-announce/attachments/20151130/d9ce92b0/attachment.sig>