2.5 Ensure that the --peer-client-cert-auth argument is set to true

Information

etcd should be configured for peer authentication.

Rationale:

etcd is a highly-available key value store used by Kubernetes deployments for persistent storage of all of its REST API objects. These objects are sensitive in nature and should be accessible only by authenticated etcd peers in the etcd cluster.

Impact:

All peers attempting to communicate with the etcd server will require a valid client certificate for authentication.

NOTE: Nessus has provided the target output to assist in reviewing the benchmark to ensure target compliance.

Solution

Edit the etcd pod specification file /etc/kubernetes/manifests/etcd.yaml on the master node and set the below parameter.

--peer-client-cert-auth=true

Default Value:

Note: This recommendation is applicable only for etcd clusters. If you are using only one etcd server in your environment then this recommendation is not applicable.

By default, --peer-client-cert-auth argument is set to false.

See Also

https://workbench.cisecurity.org/files/3891