cis-ocp-v160-1.1.21

DevOps & Security

Ensure that the OpenShift PKI key file permissions are set to 600 (Manual)

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CIS Red Hat OpenShift Container Platform Benchmark v1.6.0 - Control 1.1.21

Profile Applicability

Level: 1

Description

Ensure that the OpenShift PKI key files have permissions of 600.

Rationale

OpenShift makes use of a number of key files as part of the operation of its components. The permissions on these files should be set to 600 to protect their integrity and confidentiality.

Impact

None

Audit Procedure

Keys for control plane components like kube-apiserver, kube-controller-manager, kube-scheduler and etcd are stored with their respective static pod configurations in the directory /etc/kubernetes/static-pod-certs/secrets. Key files all have permissions 600. Run the following command.

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/*.key' -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 keys used by OpenShift are set to have permissions of 600

References

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

CIS Controls

Controls Version	Control	IG 1	IG 2	IG 3
v8	3.3 Configure Data Access Control Lists	*	*	*
v7	14.6 Protect Information through Access Control Lists	*	*	*

MITRE ATT&CK Mappings

Techniques / Sub-techniques	Tactics	Mitigations
T1083, T1222	TA0005, TA0007	M1022

Profile

Level 1 (Manual)