cis-ocp-v160-1.1.19

DevOps & Security

Ensure that the OpenShift PKI directory and file ownership is set to root:root (Manual)

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CIS Red Hat OpenShift Container Platform Benchmark v1.6.0 - Control 1.1.19

Profile Applicability

Level: 1

Description

Ensure that the OpenShift PKI directory and file ownership is set to root:root.

Rationale

OpenShift makes use of a number of certificates as part of its operation. You should verify the ownership of the directory containing the PKI information and all files in that directory to maintain their integrity. The directory and files should be owned by root:root.

Impact

None

Audit Procedure

Keys for control plane components deployed as static pods, kube-apiserver, kube-controller-manager, and openshift-kube-scheduler are stored in the directory /etc/kubernetes/static-pod-certs/secrets. The directory and file ownership are set to root:root. Run the following command.

# Should return root:root for all files and directories

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 d -wholename '*/secrets*' -exec stat -c %U:%G {} \;
       oc exec -n openshift-kube-apiserver $i -c kube-apiserver -- \
       find /etc/kubernetes/static-pod-certs -type f -wholename '*/secrets*' -exec stat -c %U:%G {} \;
       echo $i static-pod-resources
       oc exec -n openshift-kube-apiserver $i -c kube-apiserver -- \
       find /etc/kubernetes/static-pod-resources -type d -wholename '*/secrets*' -exec stat -c %U:%G {} \;
       oc exec -n openshift-kube-apiserver $i -c kube-apiserver -- \
       find /etc/kubernetes/static-pod-resources -type f -wholename '*/secrets*' -exec stat -c %U:%G {} \;
done

Verify that the ownership of all files and directories in this hierarchy is set to root:root.

Remediation

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

Default Value

By default, the static-pod-resources/secrets and static-pod-certs directories and all of the files and directories contained within it, are set to be owned by the root user.

References

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

CIS Controls

Controls Version	Control	IG 1	IG 2	IG 3
v8	5.4 Restrict Administrator Privileges to Dedicated Administrator Accounts	*	*	*
v7	4.3 Ensure the Use of Dedicated Administrative Accounts	*	*	*

MITRE ATT&CK Mappings

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

Profile

Level 1 (Manual)