| name | cis-ocp-v180-1.2.13 |
| description | Ensure that the admission control plugin NodeRestriction is set (Manual) |
| category | cis-openshift |
| version | 1.8.0 |
| author | cyberstrike-official |
| tags | ["cis","openshift","kubernetes","redhat","control-plane","api-server"] |
| cis_id | 1.2.13 |
| cis_benchmark | CIS Red Hat OpenShift Container Platform Benchmark v1.8.0 |
| tech_stack | ["kubernetes","openshift","redhat"] |
| cwe_ids | [] |
| chains_with | [] |
| prerequisites | [] |
| severity_boost | {} |
CIS Red Hat OpenShift Container Platform Benchmark v1.8.0 - Control 1.2.13
Profile Applicability
Description
Limit the Node and Pod objects that a kubelet could modify.
Rationale
Using the NodeRestriction plug-in ensures that the kubelet is restricted to the Node and Pod objects that it could modify as defined. Such kubelets will only be allowed to modify their own Node API object, and only modify Pod API objects that are bound to their node.
Impact
None.
Audit Procedure
In OpenShift, the NodeRestriction admission plugin is enabled by default.
Use the following command to obtain a list of configured admission controllers:
oc -n openshift-kube-apiserver get configmap config -o json | jq -r '.data."config.yaml"' | jq '.apiServerArguments."enable-admission-plugins"'
Verify the list includes NodeRestriction.
Remediation
None.
Default Value
In OpenShift, the NodeRestriction admission plugin is enabled by default and cannot be disabled.
References
- https://docs.openshift.com/container-platform/latest/architecture/admission-plug-ins.html
- https://github.com/openshift/origin/blob/release-4.5/vendor/k8s.io/kubernetes/cmd/kubeadm/app/phases/controlplane/manifests.go#L132
CIS Controls
| Controls Version | Control | IG 1 | IG 2 | IG 3 |
|---|
| v8 | 16.11 Leverage Vetted Modules or Services for Application Security Components | | * | * |
| v7 | 9.4 Apply Host-based Firewalls or Port Filtering | * | * | * |
MITRE ATT&CK Mappings
