| JSON |
{
"displayName": "Kubernetes cluster containers should only use allowed capabilities",
"policyType": "BuiltIn",
"mode": "Microsoft.Kubernetes.Data",
"description": "Restrict the capabilities to reduce the attack surface of containers in a Kubernetes cluster. This recommendation is part of CIS 5.2.8 and CIS 5.2.9 which are intended to improve the security of your Kubernetes environments. This policy is generally available for Kubernetes Service (AKS), and preview for AKS Engine and Azure Arc enabled Kubernetes. For more information, see https://aka.ms/kubepolicydoc.",
"metadata": {
"version": "4.0.1",
"category": "Kubernetes"
},
"parameters": {
"effect": {
"type": "String",
"metadata": {
"displayName": "Effect",
"description": "'audit' allows a non-compliant resource to be created or updated, but flags it as non-compliant. 'deny' blocks the non-compliant resource creation or update. 'disabled' turns off the policy."
},
"allowedValues": [
"audit",
"deny",
"disabled"
],
"defaultValue": "audit"
},
"excludedNamespaces": {
"type": "Array",
"metadata": {
"displayName": "Namespace exclusions",
"description": "List of Kubernetes namespaces to exclude from policy evaluation."
},
"defaultValue": [
"kube-system",
"gatekeeper-system",
"azure-arc"
]
},
"namespaces": {
"type": "Array",
"metadata": {
"displayName": "Namespace inclusions",
"description": "List of Kubernetes namespaces to only include in policy evaluation. An empty list means the policy is applied to all resources in all namespaces."
},
"defaultValue": []
},
"labelSelector": {
"type": "Object",
"metadata": {
"displayName": "Kubernetes label selector",
"description": "Label query to select Kubernetes resources for policy evaluation. An empty label selector matches all Kubernetes resources."
},
"defaultValue": {}
},
"allowedCapabilities": {
"type": "Array",
"metadata": {
"displayName": "Allowed capabilities",
"description": "The list of capabilities that are allowed to be added to a container. Provide empty list as input to block everything."
},
"defaultValue": []
},
"requiredDropCapabilities": {
"type": "Array",
"metadata": {
"displayName": "Required drop capabilities",
"description": "The list of capabilities that must be dropped by a container."
},
"defaultValue": []
},
"excludedContainers": {
"type": "Array",
"metadata": {
"displayName": "Containers exclusions",
"description": "The list of InitContainers and Containers to exclude from policy evaluation. The identify is the name of container. Use an empty list to apply this policy to all containers in all namespaces."
},
"defaultValue": []
}
},
"policyRule": {
"if": {
"field": "type",
"in": [
"AKS Engine",
"Microsoft.Kubernetes/connectedClusters",
"Microsoft.ContainerService/managedClusters"
]
},
"then": {
"effect": "[parameters('effect')]",
"details": {
"constraintTemplate": "https://store.policy.core.windows.net/kubernetes/container-allowed-capabilities/v2/template.yaml",
"constraint": "https://store.policy.core.windows.net/kubernetes/container-allowed-capabilities/v2/constraint.yaml",
"excludedNamespaces": "[parameters('excludedNamespaces')]",
"namespaces": "[parameters('namespaces')]",
"labelSelector": "[parameters('labelSelector')]",
"values": {
"allowedCapabilities": "[parameters('allowedCapabilities')]",
"requiredDropCapabilities": "[parameters('requiredDropCapabilities')]",
"excludedContainers": "[parameters('excludedContainers')]"
}
}
}
}
}
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