A new security update has been released for Gentoo Linux - Apache: Multiple vulnerabilities. Here the announcement:

Gentoo Linux Security Advisory GLSA 200602-03
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http://security.gentoo.org/
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Severity: Normal
Title: Apache: Multiple vulnerabilities
Date: February 06, 2006
Bugs: #115324, #118875
ID: 200602-03

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Synopsis
========

Apache can be exploited for cross-site scripting attacks and is
vulnerable to a Denial of Service attack.

Background
==========

The Apache HTTP server is one of the most popular web servers on the
Internet. mod_imap provides support for server-side image maps; mod_ssl
provides secure HTTP connections.

Affected packages
=================

-------------------------------------------------------------------
Package / Vulnerable / Unaffected
-------------------------------------------------------------------
1 net-www/apache < 2.0.55-r1 >= 2.0.55-r1
*>= 2.0.54-r16
== 1.3.34-r2
*>= 1.3.34-r11

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

Apache's mod_imap fails to properly sanitize the "Referer" directive of
imagemaps in some cases, leaving the HTTP Referer header unescaped. A
flaw in mod_ssl can lead to a NULL pointer dereference if the site uses
a custom "Error 400" document. These vulnerabilities were reported by
Marc Cox and Hartmut Keil, respectively.

Impact
======

A remote attacker could exploit mod_imap to inject arbitrary HTML or
JavaScript into a user's browser to gather sensitive information.
Attackers could also cause a Denial of Service on hosts using the SSL
module (Apache 2.0.x only).

Workaround
==========

There is no known workaround at this time.

Resolution
==========

All Apache users should upgrade to the latest version, depending on
whether they still use the old configuration style
(/etc/apache/conf/*.conf) or the new one (/etc/apache2/httpd.conf).

2.0.x users, new style config:

# emerge --sync
# emerge --ask --oneshot --verbose ">=net-www/apache-2.0.55-r1"

2.0.x users, old style config:

# emerge --sync
# emerge --ask --oneshot --verbose "=net-www/apache-2.0.54-r16"

1.x users, new style config:

# emerge --sync
# emerge --ask --oneshot --verbose "=net-www/apache-1.3.34-r11"

1.x users, old style config:

# emerge --sync
# emerge --ask --oneshot --verbose "=net-www/apache-1.3.34-r2"

References
==========

[ 1 ] CVE-2005-3352
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2005-3352
[ 2 ] CVE-2005-3357
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2005-3357

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

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

http://security.gentoo.org/glsa/glsa-200602-03.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 2006 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