EMAIL-023: Per-user outbound gateways disabled (GWS.GMAIL.12.1)
- Plataforma
- Google Workspace
- Categoría
- Advanced Threat Protection
- Severidad
- Medium
- Pilar de Zero Trust
- Data (peso 2)
- Fixtures de referencia
- 4
- Cobertura de ramas
- Observada: los fixtures prueban los veredictos que ejercitan
- Procedencia
- baseline
Qué comprueba
SCuBA GWS.GMAIL.12.1 requires that per-user outbound gateways be disabled. When enabled, users can route outbound mail through their own external SMTP servers, bypassing the organization's mail security controls and creating a data-exfiltration and spoofing path. This check reads the gmail.per_user_outbound_gateway policy from the Cloud Identity Policy API and flags any organizational unit where external SMTP routing is allowed. When the policy is not returned the result is Not Assessed.
Valor recomendado
Per-user outbound gateways (external SMTP) disabled for all organizational units
Remediación
In the Google Admin console under Apps > Google Workspace > Gmail > Routing, ensure per-user outbound gateways are not permitted so users cannot route mail through external SMTP servers. Keep outbound routing centralized through approved gateways only.
Veredictos probados con fixtures
Cada veredicto de esta tabla está probado por un fixture de referencia en la suite de pruebas que valida el módulo. La tabla se deriva de la última ejecución en verde; no puede editarse a mano.
| Escenario | Veredicto esperado |
|---|---|
| clean | PASS |
| known-bad | FAIL |
| no-data | Not Assessed |
| no-policy | Not Assessed |
Mapeos a marcos de referencia
- CISA SCuBA
- GWS.GMAIL.12.1v1
- NIST SP 800-53
- AC-4, SC-7, SI-8