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Gentoo Linux Security Advisory                           GLSA 201310-18
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                                            http://security.gentoo.org/
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 Severity: Normal
    Title: GnuTLS: Multiple vulnerabilities
     Date: October 28, 2013
     Bugs: #455560, #471788
       ID: 201310-18

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Synopsis
========

Multiple vulnerabilities have been discovered in GnuTLS, the worst of
which could lead to Denial of Service.

Background
==========

GnuTLS is an Open Source implementation of the TLS 1.2 and SSL 3.0
protocols.

Affected packages
=================

    -------------------------------------------------------------------
     Package              /     Vulnerable     /            Unaffected
    -------------------------------------------------------------------
  1  net-libs/gnutls            < 2.12.23-r1            >= 2.12.23-r1

Description
===========

Multiple vulnerabilities have been discovered in GnuTLS. Please review
the CVE identifiers and Lucky Thirteen research paper referenced below
for details.

Impact
======

A remote attacker could sent a specially crafted packet to cause a
Denial of Service condition. Additionally, a remote attacker could
perform man-in-the-middle attacks to recover plaintext data.

Workaround
==========

There is no known workaround at this time.

Resolution
==========

All GnuTLS users should upgrade to the latest version:

  # emerge --sync
  # emerge --ask --oneshot --verbose ">=net-libs/gnutls-2.12.23-r1"

References
==========

[ 1 ] CVE-2013-1619
      http://nvd.nist.gov/nvd.cfm?cvename=CVE-2013-1619
[ 2 ] CVE-2013-2116
      http://nvd.nist.gov/nvd.cfm?cvename=CVE-2013-2116
[ 3 ] Lucky Thirteen: Breaking the TLS and DTLS Record Protocols
      http://www.isg.rhul.ac.uk/tls/TLStiming.pdf

Availability
============

This GLSA and any updates to it are available for viewing at
the Gentoo Security Website:

 http://security.gentoo.org/glsa/glsa-201310-18.xml

Concerns?
=========

Security is a primary focus of Gentoo Linux and ensuring the
confidentiality and security of our users' machines is of utmost
importance to us. Any security concerns should be addressed to
security@gentoo.org or alternatively, you may file a bug at
https://bugs.gentoo.org.

License
=======

Copyright 2013 Gentoo Foundation, Inc; referenced text
belongs to its owner(s).

The contents of this document are licensed under the
Creative Commons - Attribution / Share Alike license.

http://creativecommons.org/licenses/by-sa/2.5