azure-appservice-auth-disabled: Azure App Service Authentication Not Enabled

id: azure-appservice-auth-disabled
info:
  name: Azure App Service Authentication Not Enabled
  author: princechaddha
  severity: medium
  description: |
    Ensure that App Service Authentication feature is enabled for Microsoft Azure App Service to add an extra layer of security to the authentication process implemented by your web applications.
  impact: |
    Disabling App Service Authentication can expose the application to unauthorized access and potential security vulnerabilities.
  remediation: |
    Enable the App Service Authentication feature for Azure App Services to ensure an additional layer of security for your web applications.
  reference:
    - https://docs.microsoft.com/en-us/azure/app-service/overview-authentication-authorization
  tags: cloud,devops,azure,microsoft,appservice,azure-cloud-config

flow: |
  code(1);
  for (let WebAppData of iterate(template.webAppList)) {
    WebAppData = JSON.parse(WebAppData);
    set("id", WebAppData.id);
    code(2);
  }

self-contained: true
code:
  - engine:
      - sh
      - bash
    source: |
      az webapp list --output json --query '[*].{id:id}'

    extractors:
      - type: json
        name: webAppList
        internal: true
        json:
          - '.[]'

  - engine:
      - sh
      - bash
    source: |
      az webapp auth show --ids "$id" --query 'enabled' --output json

    matchers:
      - type: word
        words:
          - "false"

    extractors:
      - type: dsl
        dsl:
          - 'id + " does not have App Service Authentication enabled"'
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