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==========================================================================
Ubuntu Security Notice USN-1418-1
April 05, 2012

gnutls13, gnutls26 vulnerabilities
==========================================================================

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

- Ubuntu 11.10
- Ubuntu 11.04
- Ubuntu 10.10
- Ubuntu 10.04 LTS
- Ubuntu 8.04 LTS

Summary:

The GnuTLS library could be made to crash under certain conditions.

Software Description:
- gnutls26: the GNU TLS library - commandline utilities
- gnutls13: the GNU TLS library - commandline utilities

Details:

Alban Crequy discovered that the GnuTLS library incorrectly checked array
bounds when copying TLS session data. A remote attacker could crash a client
application, leading to a denial of service, as the client application prepared
for TLS session resumption. (CVE-2011-4128)

Matthew Hall discovered that the GnuTLS library incorrectly handled TLS
records. A remote attacker could crash client and server applications, leading
to a denial of service, by sending a crafted TLS record. (CVE-2012-1573)

Update instructions:

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

Ubuntu 11.10:
  libgnutls26                     2.10.5-1ubuntu3.1

Ubuntu 11.04:
  libgnutls26                     2.8.6-1ubuntu2.1

Ubuntu 10.10:
  libgnutls26                     2.8.6-1ubuntu0.1

Ubuntu 10.04 LTS:
  libgnutls26                     2.8.5-2ubuntu0.1

Ubuntu 8.04 LTS:
  libgnutls13                     2.0.4-1ubuntu2.7

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

References:
  http://www.ubuntu.com/usn/usn-1418-1
  CVE-2011-4128, CVE-2012-1573

Package Information:
  https://launchpad.net/ubuntu/+source/gnutls26/2.10.5-1ubuntu3.1
  https://launchpad.net/ubuntu/+source/gnutls26/2.8.6-1ubuntu2.1
  https://launchpad.net/ubuntu/+source/gnutls26/2.8.6-1ubuntu0.1
  https://launchpad.net/ubuntu/+source/gnutls26/2.8.5-2ubuntu0.1
  https://launchpad.net/ubuntu/+source/gnutls13/2.0.4-1ubuntu2.7

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