Unspecified Workflows Level Permissions

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Metadata

Id: d946b13a-0b2b-49c5-b560-45b9666373e1

Cloud Provider: GitHub

Platform: CICD

Severity: Medium

Category: Access Control

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Description

Default permissions for the GITHUB_TOKEN are expected to be restricted (contents: read and packages: read). Your repository may require a different setup, so consider defining permissions for each job following the least privilege principle to restrict the impact of a possible compromise. Permissions can be defined at the job or the workflow level.

Compliant Code Examples

name: true-negative-workflow-level
on:
  push:
    branches:
      - main
  pull_request:

permissions:
  contents: read

jobs:
  linter:
    runs-on: ubuntu-latest
    steps:
      - name: Harden Runner
        uses: step-security/harden-runner@8ca2b8b2ece13480cda6dacd3511b49857a23c09
        with:
          egress-policy: block
          allowed-endpoints: >
            api.github.com:443
            github.com:443

      - name: Setup Golang
        uses: actions/setup-go@93397bea11091df50f3d7e59dc26a7711a8bcfbe
        with:
          go-version: "1.22"

      - name: Checkout Git Repo
        uses: actions/checkout@8e5e7e5ab8b370d6c329ec480221332ada57f0ab

      - name: golangci-lint
        uses: golangci/golangci-lint-action@3a919529898de77ec3da873e3063ca4b10e7f5cc
        with:
          version: v1.56.2
          args: ./...

name: per-job-true-negative
on:
  push:
    branches:
      - main

jobs:
  test:
    runs-on: ubuntu-latest
    uses: ./.github/workflows/pr-test.yml
    with:
      repo: core
    secrets: inherit
    permissions:
      contents: read

  lint:
    runs-on: ubuntu-latest
    steps:
      - name: Checkout repository
        uses: actions/checkout@v2
    permissions:
      contents: read

Non-Compliant Code Examples

name: per-job-true-positive
on:
  push:
    branches:
      - main

jobs:
  test:
    runs-on: ubuntu-latest
    uses: ./.github/workflows/pr-test.yml
    with:
      repo: core
    secrets: inherit
    permissions:
      contents: read

  lint:
    runs-on: ubuntu-latest
    steps:
      - name: Checkout repository
        uses: actions/checkout@v2

name: true-positive-no-permissions
on:
  push:
    branches:
      - main
  pull_request:

jobs:
  test:
    runs-on: ubuntu-latest
    steps:
      - name: Checkout repository
        uses: actions/checkout@v2

      - name: Run tests
        run: npm test

  lint:
    runs-on: ubuntu-latest
    steps:
      - name: Checkout repository
        uses: actions/checkout@v2

      - name: Run linter
        run: npm run lint