[Full-disclosure] [ GLSA 200703-27 ] Squid: Denial of Service

[Raphael Marichez]

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Gentoo Linux Security Advisory                           GLSA 200703-27
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                                            http://security.gentoo.org/
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  Severity: Low
     Title: Squid: Denial of Service
      Date: March 31, 2007
      Bugs: #171681
        ID: 200703-27

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Synopsis
========

Squid is affected by a Denial of Service vulnerability.

Background
==========

Squid is a multi-protocol proxy server.

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

    -------------------------------------------------------------------
     Package          /  Vulnerable  /                      Unaffected
    -------------------------------------------------------------------
  1  net-proxy/squid      < 2.6.12                           >= 2.6.12

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

Squid incorrectly handles TRACE requests that contain a "Max-Forwards"
header field with value "0" in the clientProcessRequest() function.

Impact
======

A remote attacker can send specially crafted TRACE HTTP requests that
will terminate the child process. A quickly repeated attack will lead
to a Denial of Service.

Workaround
==========

There is no known workaround at this time.

Resolution
==========

All Squid users should upgrade to the latest version:

    # emerge --sync
    # emerge --ask --oneshot --verbose ">=net-proxy/squid-2.6.12"

References
==========

  [ 1 ] CVE-2007-1560
        http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-1560

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

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

  http://security.gentoo.org/glsa/glsa-200703-27.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.org or alternatively, you may file a bug at
http://bugs.gentoo.org.

License
=======

Copyright 2007 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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