Add Kyverno admission policies and CIS mappings

2026-08-10 17:34:45 -04:00
parent fc786ec63c
commit ff033f2fcb
10 changed files with 253 additions and 12 deletions
@@ -0,0 +1,39 @@
+apiVersion: kyverno.io/v1
+kind: ClusterPolicy
+metadata:
+  name: restrict-image-registries
+  annotations:
+    policies.kyverno.io/title: Restrict image registries
+    policies.kyverno.io/category: Supply chain
+    policies.kyverno.io/severity: high
+    # CIS 5.5.1: image provenance. This is a concrete admission control that
+    # supports the broader provenance objective but is not the full CIS test.
+    policies.kyverno.io/cis-control: "5.5.1 supplemental"
+spec:
+  validationFailureAction: Enforce
+  background: false
+  failurePolicy: Fail
+  rules:
+    - name: images-from-approved-registries
+      match:
+        any:
+          - resources:
+              kinds:
+                - Pod
+              namespaceSelector:
+                matchLabels:
+                  security-baseline/open: "true"
+      validate:
+        message: Images must come from ghcr.io, quay.io, or docker.io/library.
+        foreach:
+          - list: request.object.spec.containers[]
+            anyPattern:
+              - image: ghcr.io/*
+              - image: quay.io/*
+              - image: docker.io/library/*
+          - list: request.object.spec.initContainers[]
+            anyPattern:
+              - image: ghcr.io/*
+              - image: quay.io/*
+              - image: docker.io/library/*
+