1.2.29 Ensure that the --client-ca-file argument is set as appropriate

Information

Setup TLS connection on the API server.

API server communication contains sensitive parameters that should remain encrypted in transit. Configure the API server to serve only HTTPS traffic. If --client-ca-file argument is set, any request presenting a client certificate signed by one of the authorities in the client-ca-file is authenticated with an identity corresponding to the CommonName of the client certificate.

Solution

None.

Impact:

TLS and client certificate authentication must be configured for your Kubernetes cluster deployment. By default, OpenShift uses X.509 certificates to provide secure connections between the API server and node/kubelet. OpenShift Container Platform monitors certificates for proper validity, for the cluster certificates it issues and manages. The OpenShift Container Platform alerting framework has rules to help identify when a certificate issue is about to occur. These rules consist of the following checks:

- API server client certificate expiration is less than five minutes.

See Also

https://workbench.cisecurity.org/benchmarks/19464

Item Details

Category: ACCESS CONTROL, IDENTIFICATION AND AUTHENTICATION, SYSTEM AND COMMUNICATIONS PROTECTION

References: 800-53|AC-17(2), 800-53|IA-5, 800-53|IA-5(1), 800-53|SC-8, 800-53|SC-8(1), CSCv7|14.4

Plugin: OpenShift

Control ID: 9c57371791ac566b0b8dc66d89564edfd5e1d18d09802d7d8b9b8dfced9654f3