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Gentoo Linux Security Advisory                        GLSA 200710-30:02
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                                            http://security.gentoo.org/
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  Severity: High
     Title: OpenSSL: Remote execution of arbitrary code
      Date: October 27, 2007
   Updated: October 30, 2007
      Bugs: #195634
        ID: 200710-30:02

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Synopsis
========

OpenSSL contains a vulnerability allowing execution of arbitrary code
or a Denial of Service.

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      >= 0.9.8f                          < 0.9.8f

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

Andy Polyakov reported a vulnerability in the OpenSSL toolkit, that is
caused due to an unspecified off-by-one error within the DTLS
implementation.

Impact
======

A remote attacker could exploit this issue to execute arbitrary code or
cause a Denial of Service. Only clients and servers explicitly using
DTLS are affected, systems using SSL and TLS are not.

Workaround
==========

There is no known workaround at this time.

Resolution
==========

All OpenSSL users should upgrade to the latest version:

    # emerge --sync
    # emerge --ask --oneshot --verbose ">=dev-libs/openssl-0.9.8f"

References
==========

  [ 1 ] CVE-2007-4995
        http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-4995

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

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

  http://security.gentoo.org/glsa/glsa-200710-30.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
http://bugs.gentoo.org.

License
=======

Copyright 2007 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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