Cis Ocp V190 1.1.20

CIS Red Hat OpenShift Container Platform Benchmark v1.9.0 - Control 1.1.20

Profile Applicability

• Level: 1

Description

Ensure that OpenShift PKI certificate files have permissions of 644 or more restrictive.

Rationale

OpenShift makes use of a number of certificate files as part of the operation of its components. The permissions on these files should be set to 644 or more restrictive to protect their integrity.

Impact

None

Audit Procedure

Certificates for control plane components like kube-apiserver, kube-controller-manager, and kube-scheduler are stored in the directory /etc/kubernetes/static-pod-certs/secrets. Certificate files all have permissions 600.

Run the following command.

# Should 600 or more restrictive

for i in $(oc -n openshift-kube-apiserver get pod -l app=openshift-kube-apiserver -o jsonpath='{.items[*].metadata.name}')
do
      echo $i static-pod-certs
      oc exec -n openshift-kube-apiserver $i -c kube-apiserver -- \
      find /etc/kubernetes/static-pod-certs -type f -wholename '*/secrets/*.crt' -exec stat -c %a {} \;
done

Verify that the permissions are 600.

Remediation

No remediation required; file permissions are managed by the operator.

Default Value

By default, the certificates used by OpenShift are set to have permissions of 600.

References

1. https://kubernetes.io/docs/reference/command-line-tools-reference/kube-apiserver/

CIS Controls

MITRE ATT&CK Mappings

Profile

Level 1 (Manual)