DIGISOL DG-HR1400 1.00.02 Privilege Escalation

`Title:  
======  
  
Cookie based privilege escalation in DIGISOL DG-HR1400 1.00.02 wireless router.  
  
CVE Details:  
============  
CVE-2017-6896  
  
Reference:  
==========   
  
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-6896  
https://vuldb.com/sv/?id.97954  
https://www.indrajithan.com/DIGISOL_router_previlage_escaltion  
  
  
Credit:  
======  
  
Name: Indrajith.A.N  
Website: https://www.indrajithan.com  
  
Date:  
====  
  
13-03-2017  
  
Vendor:  
======  
  
DIGISOL router is a product of Smartlink Network Systems Ltd. is one of India's leading networking company. It was established in the year 1993 to prop the Indian market in the field of Network Infrastructure.  
  
Product:  
=======  
  
DIGISOL DG-HR1400 is a wireless Router  
  
  
Product link: http://wifi.digisol.com/datasheets/DG-HR1400.pdf  
  
Abstract details:  
=================  
  
privilege escalation vulnerability in the DIGISOL DG-HR1400 wireless router enables an attacker escalate his user privilege to an admin just by modifying the Base64encoded session cookie value   
  
Affected Version:  
=============  
  
<=1.00.02  
  
  
Exploitation-Technique:  
===================  
  
Remote  
  
  
Severity Rating:  
===================  
  
8  
  
  
Proof Of Concept :  
==================  
  
1) Login to the router as a User where router sets the session cookie value to VVNFUg== (Base64 encode of "USER")  
2) So Encode "ADMIN" to base64 and force set the session cookie value to QURNSU4=   
3) Refresh the page and you are able to escalate your USER privileges to ADMIN.  
  
  
Disclosure Timeline:  
======================================  
Vendor Notification: 13/03/17  
  
`