Create restrict-secret-verbs-in-roles

rbac-best-practices/restrict-secret-verbs-in-roles

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+apiVersion: kyverno.io/v1
+kind: ClusterPolicy
+metadata:
+  name: restrict-secret-role-verbs
+  annotations:
+    policies.kyverno.io/title: Restrict Secret Verbs in Roles
+    policies.kyverno.io/category: Security
+    policies.kyverno.io/severity: medium
+    policies.kyverno.io/subject: Role, ClusterRole, 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 verbs `get`, `list`, and `watch` in a Role or ClusterRole, when paired with the Secrets resource, effectively
+      allows Secrets to be read which may expose sensitive information. This policy prevents
+      a Role or ClusterRole from using these verbs in tandem with Secret resources. In order to
+      fully implement this control, it is recommended to pair this policy with another which
+      also prevents use of the wildcard ('*') in the verbs list either when explicitly naming Secrets
+      or when also using a wildcard in the base API group.      
+spec:
+  validationFailureAction: audit
+  background: true
+  rules:
+    - name: secret-verbs
+      match:
+        any:
+        - resources:
+            kinds:
+              - Role
+              - ClusterRole
+      validate:
+        message: "Requesting verbs `get`, `list`, or `watch` on Secrets is forbidden."
+        deny:
+          conditions:
+            any:
+            - key: ["get","list","watch"]
+              operator: AnyIn
+              value: "{{ request.object.rules[?resources.contains(@,'secrets')].verbs[] }}"