AKS RBAC disabled

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Metadata

Id: 149fa56c-4404-4f90-9e25-d34b676d5b39

Cloud Provider: Azure

Platform: Ansible

Severity: Medium

Category: Access Control

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Description

AKS clusters must have role-based access control (RBAC) enabled to restrict Kubernetes API operations to authorized principals and prevent privilege escalation or unauthorized cluster modifications.

In Ansible playbooks, tasks using the azure.azcollection.azure_rm_aks or azure_rm_aks modules must define the enable_rbac property and set it to a truthy value (for example yes/true or YAML true). Resources with enable_rbac missing or not set to a truthy value are flagged as insecure.

Secure Ansible example:

- name: Create AKS cluster with RBAC enabled
  azure.azcollection.azure_rm_aks:
    name: myAKS
    resource_group: myRG
    enable_rbac: yes

Compliant Code Examples

- name: Create an AKS instance v3
  azure_rm_aks:
    name: myAKS
    resource_group: myResourceGroup
    location: eastus
    dns_prefix: akstest
    kubernetes_version: 1.14.6
    linux_profile:
      admin_username: azureuser
      ssh_key: ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAA...
    service_principal:
      client_id: cf72ca99-f6b9-4004-b0e0-bee10c521948
      client_secret: Password1234!
    agent_pool_profiles:
    - name: default
      count: 1
      vm_size: Standard_DS1_v2
      type: VirtualMachineScaleSets
      max_count: 3
      min_count: 1
    enable_rbac: yes

Non-Compliant Code Examples

- name: Create an AKS instance
  azure_rm_aks:
    name: myAKS
    resource_group: myResourceGroup
    location: eastus
    dns_prefix: akstest
    kubernetes_version: 1.14.6
    linux_profile:
      admin_username: azureuser
      ssh_key: ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAA...
    service_principal:
      client_id: "cf72ca99-f6b9-4004-b0e0-bee10c521948"
      client_secret: "Password1234!"
    agent_pool_profiles:
      - name: default
        count: 1
        vm_size: Standard_DS1_v2
        type: VirtualMachineScaleSets
        max_count: 3
        min_count: 1
    enable_rbac: no
- name: Create an AKS instance v2
  azure_rm_aks:
    name: myAKS
    resource_group: myResourceGroup
    location: eastus
    dns_prefix: akstest
    kubernetes_version: 1.14.6
    linux_profile:
      admin_username: azureuser
      ssh_key: ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAA...
    service_principal:
      client_id: "cf72ca99-f6b9-4004-b0e0-bee10c521948"
      client_secret: "Password1234!"
    agent_pool_profiles:
      - name: default
        count: 1
        vm_size: Standard_DS1_v2
        type: VirtualMachineScaleSets
        max_count: 3
        min_count: 1