Clusters should use binary authorization

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Description

Enable Binary Authorization on the cluster. This ensures that only signed images are allowed inside the cluster, increasing the supply-chain security of your clusters.

Remediation

  1. Go to the Kubernetes Engine.
  2. Select the cluster.
  3. Under the details pane, within the Security section, ensure that Binary Authorization is set to Enabled.
  4. Click SAVE.
  5. Go to Binary Authorization.
  6. Check that there is a policy defined and it does not specify Allow all images.

References