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Gentoo Linux Security Advisory                           GLSA 200608-01
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  Severity: High
     Title: Apache: Off-by-one flaw in mod_rewrite
      Date: August 01, 2006
      Bugs: #141986
        ID: 200608-01

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Synopsis
========

A flaw in mod_rewrite could result in a Denial of Service or the
execution of arbitrary code.

Background
==========

The Apache HTTP server is one of the most popular web servers on the
Internet. The Apache module mod_rewrite provides a rule-based engine to
rewrite requested URLs on the fly.

Affected packages
=================

    -------------------------------------------------------------------
     Package         /   Vulnerable   /                     Unaffected
    -------------------------------------------------------------------
  1  net-www/apache      < 2.0.58-r2                    *>= 1.3.34-r14
                                                            *>= 1.3.37
                                                          >= 2.0.58-r2

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

An off-by-one flaw has been found in Apache's mod_rewrite module by
Mark Dowd of McAfee Avert Labs. This flaw is exploitable depending on
the types of rewrite rules being used.

Impact
======

A remote attacker could exploit the flaw to cause a Denial of Service
or execution of arbitrary code. Note that Gentoo Linux is not
vulnerable in the default configuration.

Workaround
==========

There is no known workaround at this time.

Resolution
==========

All Apache users should upgrade to the latest version:

    # emerge --sync
    # emerge --ask --oneshot --verbose net-www/apache

References
==========

  [ 1 ] CVE-2006-3747
        http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2006-3747
  [ 2 ] Apache HTTP Server 2.0 Announcement
        http://www.apache.org/dist/httpd/Announcement2.0.html
  [ 3 ] Apache HTTP Server 1.3 Announcement
        http://www.apache.org/dist/httpd/Announcement1.3.html

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

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

  http://security.gentoo.org/glsa/glsa-200608-01.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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