Netis-WF2419 Cross Site Request Forgery

2018-01-29 / 2018-01-30
Credit: Sajibe Kanti
Risk: Low
Local: No
Remote: Yes
CWE: CWE-352

CVSS Base Score: 6.8/10
Impact Subscore: 6.4/10
Exploitability Subscore: 8.6/10
Exploit range: Remote
Attack complexity: Medium
Authentication: No required
Confidentiality impact: Partial
Integrity impact: Partial
Availability impact: Partial

# Exploit Title: Netis-WF2419 Router Cross-Site Request Forgery (CSRF) # Date: 28/01/2018 # Exploit Author: Sajibe Kanti # Author Contact: # Vendor Homepage: # 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 interaction. 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 : <html> <body> <form action="" method="POST"> <input type="hidden" name="mode&#95;name" value="netcore&#95;set" /> <input type="hidden" name="reserve&#95;address&#95;set" value="1" /> <input type="submit" value="Submit request" /> </form> </body> </html> Note: By loading this html code All Address Reservation List will be erased and the router becomes finally misconfigured! -- Thanks Sajibe Kanti Independent Web Security Researcher <>

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