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Gentoo Linux Security Advisory GLSA 200509-12
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http://security.gentoo.org/
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Severity: Normal
Title: Apache, mod_ssl: Multiple vulnerabilities
Date: September 19, 2005
Bugs: #103554, #104807
ID: 200509-12

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Synopsis
========

mod_ssl and Apache are vulnerable to a restriction bypass and a
potential local privilege escalation.

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/mod_ssl < 2.8.24 >= 2.8.24
2 net-www/apache < 2.0.54-r15 >= 2.0.54-r15
-------------------------------------------------------------------
2 affected packages on all of their supported architectures.
-------------------------------------------------------------------

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

mod_ssl contains a security issue when "SSLVerifyClient optional" is
configured in the global virtual host configuration (CAN-2005-2700).
Also, Apache's httpd includes a PCRE library, which makes it vulnerable
to an integer overflow (CAN-2005-2491).

Impact
======

Under a specific configuration, mod_ssl does not properly enforce the
client-based certificate authentication directive, "SSLVerifyClient
require", in a per-location context, which could be potentially used by
a remote attacker to bypass some restrictions. By creating a specially
crafted ".htaccess" file, a local attacker could possibly exploit
Apache's vulnerability, which would result in a local privilege
escalation.

Workaround
==========

There is no known workaround at this time.

Resolution
==========

All mod_ssl users should upgrade to the latest version:

# emerge --sync
# emerge --ask --oneshot --verbose ">=net-www/mod_ssl-2.8.24"

All Apache 2 users should upgrade to the latest version:

# emerge --sync
# emerge --ask --oneshot --verbose ">=net-www/apache-2.0.54-r15"

References
==========

[ 1 ] CAN-2005-2491
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2005-2491
[ 2 ] CAN-2005-2700
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2005-2700

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

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

http://security.gentoo.org/glsa/glsa-200509-12.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 (at) gentoo (dot) org [email concealed] or alternatively, you may file a bug at
http://bugs.gentoo.org.

License
=======

Copyright 2005 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/2.0

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