[ GLSA 200606-05 ] Pound: HTTP request smuggling

[Sune Kloppenborg Jeppesen <jaervosz () gentoo org>]

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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 () 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/2.5

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