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

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Message-ID: <20041021212409.GK26288@mail.lieber.org>
From: klieber at gentoo.org (Kurt Lieber)
Subject: [ GLSA 200410-21 ] Apache 2, mod_ssl: Bypass of SSLCipherSuite directive

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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@...too.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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