gcloud-func-auto-runtime-updates-disabled: Automatic Runtime Security Updates Disabled in Google Cloud Functions

id: gcloud-func-auto-runtime-updates-disabled

info:
  name: Automatic Runtime Security Updates Disabled in Google Cloud Functions
  author: princechaddha
  severity: medium
  description: |
    Ensure that automatic runtime security updates are enabled for your Google Cloud functions in order to keep the functions secure and protected against vulnerabilities without manual intervention.
  impact: |
    Having automatic runtime security updates disabled can expose Google Cloud functions to vulnerabilities which could be mitigated by timely updates.
  remediation: |
    Enable automatic runtime security updates for each Google Cloud function by setting the `serviceConfig.minInstanceCount` to a non-null value, ensuring functions are automatically updated with the latest security patches.
  reference:
    - https://cloud.google.com/functions/docs/securing/managing-security
  tags: cloud,devops,gcp,gcloud,google-cloud-functions,gcp-cloud-config

flow: |
  code(1)
  for(let projectId of iterate(template.projectIds)){
    set("projectId", projectId)
    code(2)
    for(let functionDetail of iterate(template.functions)){
      set("functionName", functionDetail)
      code(3)
    }
  }

self-contained: true

code:
  - engine:
      - sh
      - bash
    source: |
      gcloud projects list --format="json(projectId)"

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

  - engine:
      - sh
      - bash
    source: |
      gcloud functions list --project $projectId --format="json(name)"

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

  - engine:
      - sh
      - bash
    source: |
      gcloud functions describe $functionName --format="json(serviceConfig.minInstanceCount)"

    matchers:
      - type: word
        words:
          - 'null'

    extractors:
      - type: dsl
        dsl:
          - '"Automatic Runtime Security Updates Disabled in function: " + functionName + " in Project: " + projectId'
# digest: 4b0a00483046022100f41be90788c213768a91b9c804665007a6c775591d782d20231cd9998493e0e0022100b4216a242eded9560fcb101e7f96643795aa055c7fe359c346a82eca90de74cb:922c64590222798bb761d5b6d8e72950