GLSA 200509-12 Apache, mod_ssl: Multiple vulnerabilities

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 lt; 2.8.24 gt;= 2.8.24
2 net-www/apache lt; 2.0.54-r15 gt;= 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 "gt;=net-www/mod_ssl-2.8.24"

All Apache 2 users should upgrade to the latest version:

# emerge --sync
# emerge --ask --oneshot --verbose "gt;=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@gentoo.org 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