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Netis-WF2419 Cross Site Request Forgery

Netis-WF2419 Cross Site Request Forgery
Posted Jan 28, 2018
Authored by Sajibe Kanti

Netis-WF2419 suffers from a cross site request forgery vulnerability.

tags | exploit, csrf
SHA-256 | 6313ad8b216f8f105926c36e32be0fe6d548167e3d020d1c809948b4e8ce2ec7

Netis-WF2419 Cross Site Request Forgery

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# Exploit Title: Netis-WF2419 Router Cross-Site Request Forgery (CSRF)
# Date: 28/01/2018
# Exploit Author: Sajibe Kanti
# Author Contact: https://twitter.com/@sajibekantibd
# Vendor Homepage: http://www.netis-systems.com/
# Version: Netis-WF2419, V2.2.36123
# Tested on: Windows 10
#Technical Details & Description:

A cross site request forgery web vulnerability has been discovered in the
official Netis-WF2419 Router.

The vulnerability allows remote attackers to manipulate client-side
web-application to browser requests to compromise the reouter
by execution of system specific functions without session protection.

A remote attacker is able to delete Address Reservation List settings of
Netis Router with a cross site request forgery html script code.

The vulnerability can be exploited by loading embedded html code in a site
or page. The issue can also be exploited by attackers to external redirect
an user account
to malicious webpages.
The issue requires medium user interaction in case of exploitation. The
request method to execute is GET and the attack vector is located on the
client-side of the router firmware.

Exploitation of the cross site request forgery web vulnerability requires
no privilege web application user account and medium or high user
Successful exploitation results in client-side account theft by client-side
phishing, client-side external redirects and non-persistent manipulation of
application functions that are in use.

The vulnerability can be exploited by remote attackers without privilege
application user account and with medium or high user interaction.
For security demonstration or to reproduce the vulnerability follow the
provided information and steps below to continue.

#Manual steps to reproduce the vulnerability :

1. Logging Your Netis Router
1. Now inject or use the html code
2. When the user of the router opens the html code in site or other type of
redirection. Router Address Reservation List will be erased!
4. Successful reproduce of the cross site request forgery vulnerability!

#PoC: Exploitcode :

<form action=""
<input type="hidden" name="mode_name" value="netcore_set" />
<input type="hidden" name="reserve_address_set" value="1" />
<input type="submit" value="Submit request" />

Note: By loading this html code All Address Reservation List will be erased
and the router becomes finally misconfigured!

Sajibe Kanti
Independent Web Security Researcher <https://twitter.com/Sajibekantibd>
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