[waraxe-2004-SA#005] - XSS in Php-Nuke 7.1.0

Author: Janek Vind "waraxe"
Date: 15. March 2004
Location: Estonia, Tartu

Affected software description:
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Php-Nuke is popular freeware content management system, written in php by
Francisco Burzi. This CMS (COntent Management System) is used on many thousands
websites, because it`s free of charge, easy to install and has broad set of features.

Homepage: http://phpnuke.org

Vulnerabilities:
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Through the history of the PhpNuke there has been lots of messages and announcments
about the Cross-Site Scripting aka XSS problems in this popular content management system.
Now PhpNuke has allready version number 7.1.0, but still we can't say, that it's secure
software. This advisory - "waraxe-2004-SA#005" - is meant to uncover some more XSS cases,
besides those published earlier by me in "waraxe-2004-SA#002".
So, let's begin...

1. http://localhost/nuke71/modules.php?name=Feedback

If we use in "Your Name" field the string:

"><body onload=alert(document.cookie);>

then we have XSS conditions. Same applies to email field.

2. http://localhost/nuke71/modules.php?name=Your_Account&op=pass_lost

In "nicname" field we use "><body onload=alert(document.cookie);> and XSS is available.

Remark - you need to make custom form, because in the original html code there is
limited length of the "nicname" text field - 15 symbols.

3. http://localhost/nuke71/modules.php?name=Recommend_Us&op=SiteSent&fname=>[xss code here]

Remark - because the GET parameters are filtered in PhpNuke, we need to bukd custom html code
with proper form and then use POST parameters to complete the mission. By the way - even COOKIE
parameters can be used for this and it`s really handy, because COOKIE stuff get's rarely logged by
web server software. This applies to all XSS cases in PhpNuke, because the use of the code
"import_request_variables('GPC');" in the mainfile.php ;)

4. http://localhost/nuke71/modules.php?name=Downloads&d_op=TopRated&ratenum=>[xss code here]&ratetype=x

5. http://localhost/nuke71/modules.php?name=Journal&file=search&disp=showsearch

We can exploit the search field for implement the XSS.

Finally - if we use XSS, we can steal cookies, use them to pretend to be somebody else (authentication
bypass), and if the victim of the impersonating has admin rights in PhpNUke, then the entire website
is allready compromised...

Greetings:
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Greets to ulljobu, djzone, raider and to all IT freaks in Estonia!

Contact:
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come2waraxe@yahoo.com
Janek Vind "waraxe"

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Published on: 2005-01-06 (4710 reads)

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