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Gentoo Linux Security Advisory                           GLSA 200710-06
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                                            http://security.gentoo.org/
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  Severity: High
     Title: OpenSSL: Multiple vulnerabilities
      Date: October 07, 2007
      Bugs: #188799, #194039
        ID: 200710-06

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Synopsis
========

A buffer underflow vulnerability and an information disclosure
vulnerability have been discovered in OpenSSL.

Background
==========

OpenSSL is an implementation of the Secure Socket Layer and Transport
Layer Security protocols.

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

    -------------------------------------------------------------------
     Package           /   Vulnerable   /                   Unaffected
    -------------------------------------------------------------------
  1  dev-libs/openssl      < 0.9.8e-r3                    >= 0.9.8e-r3

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

Moritz Jodeit reported an off-by-one error in the
SSL_get_shared_ciphers() function, resulting from an incomplete fix of
CVE-2006-3738. A flaw has also been reported in the
BN_from_montgomery() function in crypto/bn/bn_mont.c when performing
Montgomery multiplication.

Impact
======

A remote attacker sending a specially crafted packet to an application
relying on OpenSSL could possibly execute arbitrary code with the
privileges of the user running the application. A local attacker could
perform a side channel attack to retrieve the RSA private keys.

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-0.9.8e-r3"

References
==========

  [ 1 ] CVE-2006-3738
        http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2006-3738
  [ 2 ] CVE-2007-3108
        http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-3108
  [ 3 ] CVE-2007-5135
        http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-5135

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

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

  http://security.gentoo.org/glsa/glsa-200710-06.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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