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