[ GLSA 200410-21 ] Apache 2, mod_ssl: Bypass of SSLCipherSuite directive

[Kurt Lieber <klieber () gentoo org>]

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Gentoo Linux Security Advisory                           GLSA 200410-21
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                                            http://security.gentoo.org/
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  Severity: Low
     Title: Apache 2, mod_ssl: Bypass of SSLCipherSuite directive
      Date: October 21, 2004
      Bugs: #66807
        ID: 200410-21

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Synopsis
========

In certain configurations, it can be possible to bypass restrictions
set by the "SSLCipherSuite" directive of mod_ssl.

Background
==========

The Apache HTTP server is one of the most popular web servers on the
internet. mod_ssl provides SSL v2/v3 and TLS v1 support for Apache 1.3
and is also included in Apache 2.

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

    -------------------------------------------------------------------
     Package          /  Vulnerable  /                      Unaffected
    -------------------------------------------------------------------
  1  net-www/apache       < 2.0.52                           >= 2.0.52
                                                                 < 2.0
  2  net-www/mod_ssl      < 2.8.20                           >= 2.8.20
    -------------------------------------------------------------------
     2 affected packages on all of their supported architectures.
    -------------------------------------------------------------------

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

A flaw has been found in mod_ssl where the "SSLCipherSuite" directive
could be bypassed in certain configurations if it is used in a
directory or location context to restrict the set of allowed cipher
suites.

Impact
======

A remote attacker could gain access to a location using any cipher
suite allowed by the server/virtual host configuration, disregarding
the restrictions by "SSLCipherSuite" for that location.

Workaround
==========

There is no known workaround at this time.

Resolution
==========

All Apache 2 users should upgrade to the latest version:

    # emerge sync

    # emerge -pv ">=net-www/apache-2.0.52"
    # emerge ">=net-www/apache-2.0.52"

All mod_ssl users should upgrade to the latest version:

    # emerge sync

    # emerge -pv ">=net-www/mod_ssl-2.8.20"
    # emerge ">=net-www/mod_ssl-2.8.20"

References
==========

  [ 1 ] CAN-2004-0885
        http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-0885
  [ 2 ] Apache HTTPD Bug 31505
        http://issues.apache.org/bugzilla/show_bug.cgi?id=31505

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

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

  http://security.gentoo.org/glsa/glsa-200410-21.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 2004 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/1.0

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