CNTR-K8-000270 - The Kubernetes API Server must enable Node,RBAC as the authorization mode.

Information

To mitigate the risk of unauthorized access to sensitive information by entities that have been issued certificates by DoD-approved PKIs, all DoD systems (e.g., networks, web servers, and web portals) must be properly configured to incorporate access control methods that do not rely solely on the possession of a certificate for access. Successful authentication must not automatically give an entity access to an asset or security boundary. Authorization procedures and controls must be implemented to ensure each authenticated entity also has a validated and current authorization. Authorization is the process of determining whether an entity, once authenticated, is permitted to access a specific asset.

Node,RBAC is the method within Kubernetes to control access of users and applications. Kubernetes uses roles to grant authorization API requests made by kubelets.

Satisfies: SRG-APP-000033-CTR-000090, SRG-APP-000033-CTR-000095

Solution

Edit the Kubernetes API Server manifest file in the /etc/kubernetes/manifests directory on the Kubernetes Master Node. Set the value of '--authorization-mode' to 'Node,RBAC'.

See Also

https://dl.dod.cyber.mil/wp-content/uploads/stigs/zip/U_Kubernetes_V1R5_STIG.zip

Item Details

Category: ACCESS CONTROL

References: 800-53|AC-3, CAT|II, CCI|CCI-000213, Rule-ID|SV-242382r712502_rule, STIG-ID|CNTR-K8-000270, Vuln-ID|V-242382

Plugin: Unix

Control ID: 2c1a0542db59f7754f594a0a42b4cd45eaef0037f8ad32efb33d1d36bd9354af