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Gentoo Linux Security Advisory                           GLSA 200704-08
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  Severity: Low
     Title: DokuWiki: Cross-site scripting vulnerability
      Date: April 12, 2007
      Bugs: #163781
        ID: 200704-08

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Synopsis
========

DokuWiki is vulnerable to a cross-site scripting attack.

Background
==========

DokuWiki is a simple to use wiki aimed at creating documentation.

Affected packages
=================

    -------------------------------------------------------------------
     Package            /  Vulnerable  /                    Unaffected
    -------------------------------------------------------------------
  1  www-apps/dokuwiki     < 20061106                      >= 20061106

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

DokuWiki does not sanitize user input to the GET variable 'media' in
the fetch.php file.

Impact
======

An attacker could entice a user to click a specially crafted link and
inject CRLF characters into the variable. This would allow the creation
of new lines or fields in the returned HTTP Response header, which
would permit the attacker to execute arbitrary scripts in the context
of the user's browser.

Workaround
==========

Replace the following line in lib/exe/fetch.php:
    $MEDIA = getID('media',false); // no cleaning - maybe external

with
    $MEDIA = preg_replace('/[\x00-\x1F]+/s','',getID('media',false));

Resolution
==========

All DokuWiki users should upgrade to the latest version:

    # emerge --sync
    # emerge --ask --oneshot --verbose ">=www-apps/dokuwiki-20061106"

References
==========

  [ 1 ] CVE-2006-6965
        http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2006-6965

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

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

  http://security.gentoo.org/glsa/glsa-200704-08.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 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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