gcloud-artifact-registry-public: Publicly Accessible Artifact Registry Repositories

id: gcloud-artifact-registry-public

info:
  name: Publicly Accessible Artifact Registry Repositories
  author: princechaddha
  severity: high
  description: |
    Identify any publicly accessible Artifact Registry repositories within your Google Cloud account and update their IAM policy in order to protect against unauthorized access. To deny access from anonymous and public users, remove the bindings for "allUsers" and "allAuthenticatedUsers" members from the IAM policy associated with your repository.
  impact: |
    Public accessibility of Artifact Registry repositories can lead to unauthorized data access or data leaks. Restricting access ensures that only authorized entities can view or manipulate the repositories.
  remediation: |
    Update the IAM policies for each Artifact Registry repository to remove "allUsers" and "allAuthenticatedUsers". This action will ensure that repositories are not exposed to any user on the internet or authenticated users not explicitly granted permission.
  reference:
    - https://cloud.google.com/artifact-registry/docs/managing/access-control
  tags: cloud,devops,gcp,gcloud,artifact-registry,gcp-cloud-config

flow: |
  code(1)
  for(let projectId of iterate(template.projectIds)){
    set("projectId", projectId)
    code(2)
    for(let repository of iterate(template.repositories)){
      set("repositoryName", repository)
      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 artifacts repositories list --project $projectId --format="json(name)"

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

  - engine:
      - sh
      - bash
    source: |
      gcloud artifacts repositories get-iam-policy $repositoryName --project $projectId --format=json | jq '.bindings[].members[]'

    matchers:
      - type: word
        words:
          - 'allUsers'
          - 'allAuthenticatedUsers'
        condition: or

    extractors:
      - type: dsl
        dsl:
          - '"Publicly Accessible Artifact Repository: " + repositoryName + " in Project: " + projectId'
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