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Create restrict-binding-to-clusteradmin #162

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Create restrict-binding-to-clusteradmin #162

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33 changes: 33 additions & 0 deletions rbac-best-practices/restrict-binding-to-clusteradmin
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apiVersion: kyverno.io/v1
kind: ClusterPolicy
metadata:
name: restrict-binding-clusteradmin
annotations:
policies.kyverno.io/title: Restrict Binding to Cluster-Admin
policies.kyverno.io/category: Security
policies.kyverno.io/severity: medium
policies.kyverno.io/subject: RoleBinding, ClusterRoleBinding, RBAC
kyverno.io/kyverno-version: 1.6.2
policies.kyverno.io/minversion: 1.6.0
kyverno.io/kubernetes-version: "1.23"
policies.kyverno.io/description: >-
The cluster-admin ClusterRole allows any action to be performed on any resource
in the cluster and its granting should be heavily restricted. This
policy prevents binding to the cluster-admin ClusterRole in
RoleBinding or ClusterRoleBinding resources.
spec:
validationFailureAction: audit
background: true
rules:
- name: clusteradmin-bindings
match:
any:
- resources:
kinds:
- RoleBinding
- ClusterRoleBinding
validate:
message: "Binding to cluster-admin is not allowed."
pattern:
roleRef:
name: "!cluster-admin"
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