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XCCDF
Guide to the Secure Configuration of Red Hat OpenShift Container Platform 4
Kubernetes Settings
Kubernetes - General Security Practices
Manage Image Provenance Using ImagePolicyWebhook
Manage Image Provenance Using ImagePolicyWebhook
An XCCDF Rule
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Manage Image Provenance Using ImagePolicyWebhook
Medium Severity
OpenShift administrators can control which images can be imported, tagged, and run in a cluster. There are two facilities for this purpose: (1) Allowed Registries, allowing administrators to restrict image origins to known external registries; and (2) ImagePolicy Admission plug-in which lets administrators specify specific images which are allowed to run on the OpenShift cluster. Configure an Image policy per the Image Policy chapter in the OpenShift documentation:
https://docs.openshift.com/container-platform/4.4/openshift_images/image-configuration.html