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==========================================================================
Ubuntu Security Notice USN-1752-1
February 27, 2013

gnutls13, gnutls26 vulnerability
==========================================================================

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

- Ubuntu 12.10
- Ubuntu 12.04 LTS
- Ubuntu 11.10
- Ubuntu 10.04 LTS
- Ubuntu 8.04 LTS

Summary:

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

Software Description:
- gnutls26: GNU TLS library
- gnutls13: GNU TLS library

Details:

Nadhem Alfardan and Kenny Paterson discovered that the TLS protocol as used
in GnuTLS was vulnerable to a timing side-channel attack known as the
"Lucky Thirteen" issue. A remote attacker could use this issue to
 perform
plaintext-recovery attacks via analysis of timing data.

Update instructions:

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

Ubuntu 12.10:
  libgnutls26                     2.12.14-5ubuntu4.2

Ubuntu 12.04 LTS:
  libgnutls26                     2.12.14-5ubuntu3.2

Ubuntu 11.10:
  libgnutls26                     2.10.5-1ubuntu3.3

Ubuntu 10.04 LTS:
  libgnutls26                     2.8.5-2ubuntu0.3

Ubuntu 8.04 LTS:
  libgnutls13                     2.0.4-1ubuntu2.9

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

References:
  http://www.ubuntu.com/usn/usn-1752-1
  CVE-2013-1619

Package Information:
  https://launchpad.net/ubuntu/+source/gnutls26/2.12.14-5ubuntu4.2
  https://launchpad.net/ubuntu/+source/gnutls26/2.12.14-5ubuntu3.2
  https://launchpad.net/ubuntu/+source/gnutls26/2.10.5-1ubuntu3.3
  https://launchpad.net/ubuntu/+source/gnutls26/2.8.5-2ubuntu0.3
  https://launchpad.net/ubuntu/+source/gnutls13/2.0.4-1ubuntu2.9



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