bugtraq - [ GLSA 200606-05 ] Pound: HTTP request smuggling

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Message-ID: <200606072013.15039.jaervosz@gentoo.org>
Date: Wed, 7 Jun 2006 20:13:14 +0200
From: Sune Kloppenborg Jeppesen <jaervosz@...too.org>
To: gentoo-announce@...too.org
Cc: full-disclosure@...ts.grok.org.uk, bugtraq@...urityfocus.com,
	security-alerts@...uxsecurity.com
Subject: [ GLSA 200606-05 ] Pound: HTTP request smuggling

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Gentoo Linux Security Advisory                           GLSA 200606-05
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                                            http://security.gentoo.org/
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  Severity: Low
     Title: Pound: HTTP request smuggling
      Date: June 07, 2006
      Bugs: #118541
        ID: 200606-05

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Synopsis
========

Pound is vulnerable to HTTP request smuggling, which could be exploited
to bypass security restrictions or poison web caches.

Background
==========

Pound is a reverse proxy, load balancer and HTTPS front-end. It allows
to distribute the load on several web servers and offers a SSL wrapper
for web servers that do not support SSL directly.

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

    -------------------------------------------------------------------
     Package            /  Vulnerable  /                    Unaffected
    -------------------------------------------------------------------
  1  www-servers/pound       < 2.0.5                          >= 2.0.5

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

Pound fails to handle HTTP requests with conflicting "Content-Length"
and "Transfer-Encoding" headers correctly.

Impact
======

An attacker could exploit this vulnerability by sending HTTP requests
with specially crafted "Content-Length" and "Transfer-Encoding" headers
to bypass certain security restrictions or to poison the web proxy
cache.

Workaround
==========

There is no known workaround at this time.

Resolution
==========

All Pound users should upgrade to the latest version:

    # emerge --sync
    # emerge --ask --oneshot --verbose ">=www-servers/pound-2.0.5"

References
==========

  [ 1 ] CVE-2005-3751
        http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2005-3751

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

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

  http://security.gentoo.org/glsa/glsa-200606-05.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@...too.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/2.5

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