restrict-role-secrets.yaml

# Copyright 2024 Google LLC
#
# This is “Software” that is licensed under the “General Software” section of
# the Service Specific Terms (https://cloud.google.com/terms/service-terms) for
# usage in accordance with the following “Scope of Use”: This file may only be
# used on an Anthos cluster, including any associated ci/cd use. “Anthos
# cluster” is defined as “A Cluster (of any kind) registered to a fleet project
# where the Anthos API is enabled”.
apiVersion: constraints.gatekeeper.sh/v1beta1
kind: K8sRestrictRoleRules
metadata:
  name: cis-k8s-v1.7.1-restrict-role-secrets
  labels:
    policycontroller.gke.io/bundleName: cis-k8s-v1.7.1
  annotations:
    policycontroller.gke.io/bundleVersion: 202403.0-preview
    policycontroller.gke.io/constraintData: |-
      "{
        bundleName: 'cis-k8s-v1.7.1',
        bundleDisplayName: 'CIS Kubernetes Benchmark v1.7.1',
        bundleLink: 'https://cloud.google.com/anthos-config-management/docs/how-to/using-cis-k8s-benchmark',
        bundleVersion: '202403.0-preview',
        bundleDescription: 'Use the CIS Kubernetes Benchmark 1.7.1 policy bundle with Policy Controller to evaluate the compliance of your cluster resources against the CIS Kubernetes Benchmark, which is a set of recommendations for configuring Kubernetes to support a robust security posture.',
        controlNumbers: '[5.1.2]',
        severity: 'UNSPECIFIED',
        description: 'Restricts the use of secrets in `Roles` and `ClusterRoles`.',
        remediation: 'The use of secrets permission in `Roles` and `ClusterRoles` is restricted. Remove all secret rules from your `Roles` and `ClusterRoles`. See "RoleBinding and ClusterRoleBinding" for more information: https://kubernetes.io/docs/reference/access-authn-authz/rbac/#rolebinding-and-clusterrolebinding',
        minimumTemplateLibraryVersion: '1.15.2',
        constraintHash: '18bfe530c0d7097b94831126846b2b5280dcffdbd33039b20c1186d4218f606b'
      }"
spec:
  enforcementAction: dryrun
  match:
    excludedNamespaces:
      - anthos-identity-service
      - cert-manager
      - gatekeeper-system
      - gke-connect
      - gke-gmp-system
      - gke-system
      - gmp-public
      - gmp-system
      - kube-system
      - apigee
    kinds:
      - apiGroups:
          - rbac.authorization.k8s.io
        kinds:
          - Role
          - ClusterRole
  parameters:
    disallowedRules:
      - apiGroups:
          - ""
        resources:
          - secrets
        verbs:
          - get
          - list
          - watch
    exemptions:
      clusterRoles:
        - name: ^anthos-baremetal-operator.+$
          regexMatch: true
        - name: ^cap-manager-role.+$
          regexMatch: true
        - name: capi-aggregated-manager-role
        - name: ^capi-kubeadm-bootstrap-manager-role.+$
          regexMatch: true
        - name: ^capi-manager-role.+$
          regexMatch: true
        - name: cert-manager-cainjector
        - name: ^cert-manager-controller.+$
          regexMatch: true
        - name: cert-manager-controller-challenges
        - name: cert-manager-controller-clusterissuers
        - name: cert-manager-controller-certificates
        - name: cert-manager-controller-issuers
        - name: cert-manager-controller-orders
        - name: cluster-admin
        - name: gkeonprem-p4sa
        - name: kube-state-metrics
        - name: istiod-gke-system
        - name: lifecycle-controllers-deployer
        - name: lifecycle-controllers-manager
        - name: ^preflightcheck-operator.+$
          regexMatch: true
        - name: stackdriver-operator
        - name: system:controller:clusterrole-aggregation-controller
        - name: system:controller:expand-controller
        - name: system:controller:generic-garbage-collector
        - name: system:controller:namespace-controller
        - name: system:controller:persistent-volume-binder
        - name: system:kube-controller-manager
        - name: vmruntime-vmruntime-manager-role
        # for GKE
        - name: admin
        - name: edit
        - name: servicemesh
        - name: system:aggregate-to-edit
        - name: system:controller:resourcequota-controller
        - name: system:gke-common-webhooks
        - name: system:glbc-status
        - name: metering
        - name: gatekeeper-manager-role
        - name: system:kubestore-collector
        - name: system:cloud-controller-manager
        - name: system:cloud-controller-manager
        - name: istio-reader-clusterrole-managed
        - name: config-management-operator
        - name: system:node
        - name: resource-group-manager-role
        - name: policycontroller
        # for Apigee
        - name: ^apigee.*$
          regexMatch: true