[ GLSA 200710-06 ] OpenSSL: Multiple vulnerabilities

[Pierre-Yves Rofes <py () gentoo org>]

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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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