last sync: 2021-May-14 16:08:20 UTC

Azure Policy definition

Kubernetes cluster containers should only use allowed capabilities

Name Kubernetes cluster containers should only use allowed capabilities
Azure Portal
Id c26596ff-4d70-4e6a-9a30-c2506bd2f80c
Version 3.0.0
details on versioning
Category Kubernetes
Microsoft docs
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.
Mode Microsoft.Kubernetes.Data
Type BuiltIn
Preview FALSE
Deprecated FALSE
Effect Default: audit
Allowed: (audit, deny, disabled)
Used RBAC Role none
History
Date/Time (UTC ymd) (i) Change type Change detail
2021-03-02 15:11:40 change Major (2.0.1 > 3.0.0)
2020-12-11 15:42:52 change Major (1.0.1 > 2.0.1)
2020-09-15 14:06:41 change Previous DisplayName: [Preview]: Kubernetes cluster containers should only use allowed capabilities
2020-07-08 14:28:08 add c26596ff-4d70-4e6a-9a30-c2506bd2f80c
Used in Initiatives
Initiative DisplayName Initiative Id Initiative Category State
[Deprecated]: Azure Security Benchmark v2 bb522ac1-bc39-4957-b194-429bcd3bcb0b Regulatory Compliance Deprecated
Azure Security Benchmark 1f3afdf9-d0c9-4c3d-847f-89da613e70a8 Security Center GA
Kubernetes cluster pod security baseline standards for Linux-based workloads a8640138-9b0a-4a28-b8cb-1666c838647d Kubernetes GA
Kubernetes cluster pod security restricted standards for Linux-based workloads 42b8ef37-b724-4e24-bbc8-7a7708edfe00 Kubernetes GA
JSON Changes

JSON
{
  "properties": {
    "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": "3.0.0",
      "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": [
          
        ]
      }
    },
    "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/v1/template.yaml",
          "constraint": "https://store.policy.core.windows.net/kubernetes/container-allowed-capabilities/v1/constraint.yaml",
        "excludedNamespaces": "[parameters('excludedNamespaces')]",
        "namespaces": "[parameters('namespaces')]",
        "labelSelector": "[parameters('labelSelector')]",
          "values": {
          "allowedCapabilities": "[parameters('allowedCapabilities')]",
          "requiredDropCapabilities": "[parameters('requiredDropCapabilities')]"
          }
        }
      }
    }
  },
  "id": "/providers/Microsoft.Authorization/policyDefinitions/c26596ff-4d70-4e6a-9a30-c2506bd2f80c",
  "type": "Microsoft.Authorization/policyDefinitions",
  "name": "c26596ff-4d70-4e6a-9a30-c2506bd2f80c"
}