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Gentoo Linux Security Advisory 200410-21

Gentoo Linux Security Advisory 200410-21
Posted Oct 27, 2004
Authored by Gentoo | Site security.gentoo.org

Gentoo Linux Security Advisory GLSA 200410-21 - 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.

tags | advisory
systems | linux, gentoo
advisories | CVE-2004-0885
SHA-256 | 06b3bc6d3391335b9f299d76aa4089572536a66060eb87668867cda8b1c74110

Gentoo Linux Security Advisory 200410-21

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Gentoo Linux Security Advisory GLSA 200410-21
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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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