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Gentoo Linux Security Advisory                           GLSA 200608-01
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http://security.gentoo.org/ 
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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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