DIGISOL DG-HR1400 1.00.02 Wireless Router - 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:
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Name: Indrajith.A.N
Website: https://www.indrajithan.com

Date:
====

13-03-2017

Vendor:
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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