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Gentoo Linux Security Advisory                           GLSA 201402-25
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                                            http://security.gentoo.org/
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 Severity: Normal
    Title: OpenSSL: Denial of Service
     Date: February 21, 2014
     Bugs: #497838
       ID: 201402-25

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Synopsis
========

A vulnerability in OpenSSL's handling of TLS handshakes could result in
a Denial of Service condition.

Background
==========

OpenSSL is an Open Source toolkit implementing the Secure Sockets Layer
(SSL v2/v3) and Transport Layer Security (TLS v1) as well as a general
purpose cryptography library.

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

    -------------------------------------------------------------------
     Package              /     Vulnerable     /            Unaffected
    -------------------------------------------------------------------
  1  dev-libs/openssl             < 1.0.1f                  >= 1.0.1f
                                                              < 1.0.1

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

A flaw in the ssl3_take_mac function can result in a NULL pointer
dereference.

Impact
======

A remote attacker could send a specially crafted TLS handshake,
resulting in a Denial of Service condition.

Workaround
==========

There is no known workaround at this time.

Resolution
==========

All OpenSSL 1.0.1 users should upgrade to the latest version:

  # emerge --sync
  # emerge --ask --oneshot --verbose ">=dev-libs/openssl-1.0.1f"

References
==========

[ 1 ] CVE-2013-4353
      http://nvd.nist.gov/nvd.cfm?cvename=CVE-2013-4353

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

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

 http://security.gentoo.org/glsa/glsa-201402-25.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 2014 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


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