← Policy catalog
</> ValidatingAdmissionPolicy · Apache-2.0

Audits Instead of Enforcing Violations

clusterpolicy-kyverno-not-enforcing

severityModerate resourceClusterPolicies productKyverno bundles1

A ClusterPolicy left on Audit only records violations in a report, so the workloads it was written to block are admitted cluster-wide anyway and the protection exists only as a log entry.

Rejects unless

!(object.spec.?validationFailureAction.orValue('Enforce') in ['Audit', 'audit']) &&
!object.spec.?rules.orValue([]).exists(r,
  r.?validate.failureAction.orValue('Enforce') in ['Audit', 'audit']
)

Kyverno ClusterPolicies must enforce (not Audit) validation failures.

Remediation

Set the policy-level validationFailureAction to Enforce and change any rule that overrides it with Audit. Fields: spec.validationFailureAction, spec.rules[*].validate.failureAction.

Applies to

  • clusterpolicies · kyverno.io/v1 · CREATE, UPDATE

Manifest

apiVersion: admissionregistration.k8s.io/v1
kind: ValidatingAdmissionPolicy
metadata:
  name: clusterpolicy-kyverno-not-enforcing
  annotations:
    kubeapt.io/uuid: "5a1658e9-655f-44ce-a2d3-7d4fb70857e2"
    security.kubeapt.io/displayName: "Audits Instead of Enforcing Violations"
    security.kubeapt.io/description: "A ClusterPolicy left on Audit only records violations in a report, so the workloads it was written to block are admitted cluster-wide anyway and the protection exists only as a log entry."
    security.kubeapt.io/resource: "ClusterPolicies"
    security.kubeapt.io/severity: "Moderate"
    security.kubeapt.io/remediation: "Set the policy-level validationFailureAction to Enforce and change any rule that overrides it with Audit. Fields: spec.validationFailureAction, spec.rules[*].validate.failureAction."
    security.kubeapt.io/product: "Kyverno"
spec:
  failurePolicy: Fail
  matchConstraints:
    resourceRules:
    - apiGroups:
      - kyverno.io
      apiVersions:
      - v1
      operations:
      - CREATE
      - UPDATE
      resources:
      - clusterpolicies
  validations:
  - expression: |
      !(object.spec.?validationFailureAction.orValue('Enforce') in ['Audit', 'audit']) &&
      !object.spec.?rules.orValue([]).exists(r,
        r.?validate.failureAction.orValue('Enforce') in ['Audit', 'audit']
      )
    message: |
      Kyverno ClusterPolicies must enforce (not Audit) validation failures.

Save it as clusterpolicy-kyverno-not-enforcing.yaml — the commands below assume that name.

Validate with kubeapt

Check a workload against this one policy, before anything is installed on a cluster.

$ kubeapt validate -p ./clusterpolicy-kyverno-not-enforcing.yaml -r ./workload.yaml

Or without the file, from the published policy set — -r takes a directory too:

$ kubeapt policies download && kubeapt validate --policy-name clusterpolicy-kyverno-not-enforcing -r ./manifests

Or against every namespace in the cluster your kubeconfig points at:

$ kubeapt validate --policy-name clusterpolicy-kyverno-not-enforcing -A

Bundles

Source

View policy.yaml on GitHub →