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

From: Kurt Lieber (klieber_at_gentoo.org)
Date: 10/21/04

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    To: gentoo-announce@lists.gentoo.org
    Date: Thu, 21 Oct 2004 21:24:09 +0000
    
    
    

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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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