Initial commit

infrastructure/kyverno/policies/require-drop-all-capabilities.yaml

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+apiVersion: kyverno.io/v1
+kind: ClusterPolicy
+metadata:
+  name: require-drop-all-capabilities
+  annotations:
+    policies.kyverno.io/title: Require Drop All Capabilities
+    policies.kyverno.io/category: DoD STIG
+    policies.kyverno.io/severity: high
+    policies.kyverno.io/description: >-
+      STIG V-242398: Containers must drop all Linux capabilities and only
+      add back specific capabilities that are required. This follows the
+      principle of least privilege for container security contexts.
+spec:
+  validationFailureAction: Audit
+  background: true
+  rules:
+    - name: require-drop-all
+      match:
+        any:
+          - resources:
+              kinds:
+                - Pod
+      exclude:
+        any:
+          - resources:
+              namespaces:
+                - kube-system
+                - rook-ceph
+                - istio-system
+                - prometheus
+                - kyverno
+                - argocd
+                - cert-manager
+                - cnpg-system
+                - envoy-gateway-system
+                - kiali-operator
+                - mariadb-system
+                - redis-operator
+                - reloader
+                - scylla-operator
+                - vault
+                - mqtt
+                - gitlab
+                - netbird
+                - grafana
+                - crowdsec
+                - external-dns
+                - nextcloud
+                - home-assistant
+                - guacamole
+                - teslamate
+                - unpoller
+                - frigate
+                - authentik
+                - checkov
+                - external-secrets
+      validate:
+        message: >-
+          Containers must drop ALL capabilities (STIG V-242398).
+          Add securityContext.capabilities.drop: ["ALL"] to each container.
+        pattern:
+          spec:
+            containers:
+              - securityContext:
+                  capabilities:
+                    drop:
+                      - ALL
+            =(initContainers):
+              - securityContext:
+                  capabilities:
+                    drop:
+                      - ALL