Microsoft 365
TMA-M365-5.1.4.1
Ensure the ability to join devices to Entra is restricted
Descripción
This setting enables you to select the users who can register their devices as Microsoft Entra joined devices. The recommended state is Selected or None. Note: This setting is applicable only to Microsoft Entra join on Windows 10 or newer. This setting doesn't apply to Microsoft Entra hybrid joined devices, Microsoft Entra joined VMs in Azure, or Microsoft Entra joined devices that use Windows Autopilot self- deployment mode because these methods work in a userless context. If a threat actor compromises a standard user account, they can enroll a rogue device under that user's identity. This device may inherit MDM policies and appear compliant, giving attackers persistent access to cloud resources without triggering MFA. In a 2023 blog, Microsoft IR reports that it has detected threat actors registering their own devices to the Microsoft Entra tenant, giving them a platform to escalate...
Cómo se verifica
Método de auditoría: Revisión manual
To audit using the UI: 1. Navigate to Microsoft Entra admin center https://entra.microsoft.com/. 2. Expand Entra ID > Devices and select Device settings. 3. Verify that Users may join devices to Microsoft Entra is set to Selected or None. To audit using the Microsoft Graph API: 1. Execute a GET request to the following relative URI: beta/policies/deviceRegistrationPolicy 3. Verify that azureADJoin.allowedToJoin.@odata.type is one of the following: o #microsoft.graph.enumeratedDeviceRegistrationMembership (Selected) o #microsoft.graph.noDeviceRegistrationMembership (None). Note: When set to Selected, users and groups will also appear in the output of the Graph Request.
Cómo se corrige
Método de corrección: Guía o parche de infraestructura
To remediate using the UI: 1. Navigate to Microsoft Entra admin center https://entra.microsoft.com/. 2. Expand Entra ID > Devices and select Device settings. 3. Set Users may join devices to Microsoft Entra to Selected (and add members) or None.
Propiedades
- Sistemas operativos
- Cualquiera
- Etiquetas
- m365saas
- Referencia
- CIS Microsoft 365 Foundations Benchmark v7.0.0 - 5.1.4.1 Ensure the ability to join devices to Entra is restricted