fleet/.github/workflows/check-vulnerabilities-in-main-docker-image.yml

name: Check critical vulnerabilities in main docker image

# Sibling to check-vulnerabilities-in-released-docker-images.yml. That workflow
# scans the 5 most-recent shipped releases; this one builds the fleet image
# from the current main branch and scans it. Together they cover both the
# already-released attack surface and the in-flight one (e.g. new OS-package
# CVEs that land in the Alpine base image before the next minor cut).

on:
  workflow_dispatch:
  schedule:
    - cron: "0 7 * * *"

# A newly queued run on the same ref interrupts an in-flight one. github.ref is
# always defined (refs/heads/<default_branch> on schedule, the dispatched ref on
# workflow_dispatch), so scheduled and dispatched runs share a deterministic group.
concurrency:
  group: ${{ github.workflow }}-${{ github.ref }}
  cancel-in-progress: true

defaults:
  run:
    # fail-fast using bash -eo pipefail. See https://docs.github.com/en/actions/using-workflows/workflow-syntax-for-github-actions#exit-codes-and-error-action-preference
    shell: bash

permissions:
  contents: read

jobs:
  build-and-check:
    runs-on: ubuntu-22.04
    steps:
      - name: Harden Runner
        uses: step-security/harden-runner@9af89fc71515a100421586dfdb3dc9c984fbf411 # v2.19.4
        with:
          egress-policy: audit

      - name: Checkout
        uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
        with:
          persist-credentials: false

      - name: Build fleet docker image
        run: |
          # OS-package CVE coverage doesn't need a real fleet binary; placeholder
          # keeps the Dockerfile's COPY step happy without paying for a full Go build.
          touch tools/fleet-docker/fleet
          chmod +x tools/fleet-docker/fleet
          docker build -f tools/fleet-docker/Dockerfile -t fleetdm/fleet:main-scan tools/fleet-docker/

      - name: List fleet VEX files
        id: generate_fleet_vex_files
        run: |
          # Trivy requires a separate --vex flag per source file; a comma-separated
          # value is treated as one path. Emit the output pre-formatted as repeated
          # `--vex=...` tokens so the trivy step can splat it directly.
          VEX_FLAGS=$(ls -1 ./security/vex/fleet/ | while IFS= read -r line; do printf -- '--vex=./security/vex/fleet/%s ' "$line"; done)
          echo "$VEX_FLAGS"
          echo "FLEET_VEX_FLAGS=$VEX_FLAGS" >> $GITHUB_OUTPUT

      # We use the trivy command and not the github action because it doesn't support loading
      # VEX files yet. Mirrors check-vulnerabilities-in-released-docker-images.yml.
      - name: Run trivy vulnerability scanner on locally-built fleetdm/fleet image
        env:
          TRIVY_DB_REPOSITORY: public.ecr.aws/aquasecurity/trivy-db
          TRIVY_JAVA_DB_REPOSITORY: public.ecr.aws/aquasecurity/trivy-java-db
          FLEET_VEX_FLAGS: ${{ steps.generate_fleet_vex_files.outputs.FLEET_VEX_FLAGS }}
        run: |
          mkdir trivy-download
          cd trivy-download
          curl -fsSL --retry 3 https://github.com/aquasecurity/trivy/releases/download/v0.69.2/trivy_0.69.2_Linux-64bit.tar.gz --output trivy_0.69.2_Linux-64bit.tar.gz
          tar -xf trivy_0.69.2_Linux-64bit.tar.gz
          mv trivy ..
          cd ..
          chmod +x ./trivy
          unset trivy_exit_code
          # --pkg-types=os only: Go module CVEs in the real binary are already
          # tracked separately (Dependabot, govulncheck, Aikido SCA). This scan
          # exists to catch base-image OS-package CVEs between release cuts.
          ./trivy image \
            --exit-code=1 \
            --pkg-types=os \
            --severity=CRITICAL \
            $FLEET_VEX_FLAGS \
            --format=json \
            --output=trivy-results-fleet-main.json \
            fleetdm/fleet:main-scan || trivy_exit_code=$?
          # Print a human-readable table to the job log for debugging.
          ./trivy convert --format table trivy-results-fleet-main.json
          if [ -n "${trivy_exit_code:-}" ]; then
            exit "$trivy_exit_code"
          fi

      - name: Extract CVE list for Slack notification
        id: extract_cves
        if: failure()
        run: |
          shopt -s nullglob
          files=(trivy-results-*.json)
          shopt -u nullglob
          if [ ${#files[@]} -gt 0 ]; then
            # `safe` JSON-escapes string fields so they can be embedded inline in
            # the Slack payload JSON (titles can contain quotes, backslashes, etc.).
            # `\\n` (literal backslash-n) is used as the separator so the value
            # stays on a single line in $GITHUB_OUTPUT and Slack renders it as a
            # newline when parsing the JSON payload.
            cve_list=$(jq -r -s '
              def safe(s): (s // "") | tojson | .[1:-1];
              [.[] | (.ArtifactName // "?") as $image | .Results[]?.Vulnerabilities[]? | . + {image: $image}]
              | unique_by(.VulnerabilityID + "|" + (.PkgName // "") + "|" + .image)
              | sort_by(.Severity, .VulnerabilityID, .image)
              | map("• *\(.VulnerabilityID)* (\(.Severity // "UNKNOWN")) in `\(safe(.image))` — \(safe(.PkgName // "?")) \(safe(.InstalledVersion // "?")) → \(safe(.FixedVersion // "?"))\\n    _\(safe(.Title // "(no title)"))_")
              | join("\\n")
            ' "${files[@]}")
          fi
          echo "cve_list=${cve_list:-(no CVE list available — check job logs)}" >> "$GITHUB_OUTPUT"

      - name: Slack notification
        if: github.event.schedule == '0 7 * * *' && failure()
        uses: slackapi/slack-github-action@e28cf165c92ffef168d23c5c9000cffc8a25e117 # v1.24.0
        with:
          payload: |
            {
              "text": "${{ job.status }}\n${{ github.event.pull_request.html_url || github.event.head.html_url }}",
              "blocks": [
                {
                  "type": "section",
                  "text": {
                    "type": "mrkdwn",
                    "text": "⚠️ Check vulnerabilities in main docker image failed.\nhttps://github.com/fleetdm/fleet/actions/runs/${{  github.run_id }}\n\n*Detected CVEs:*\n${{ steps.extract_cves.outputs.cve_list }}"
                  }
                }
              ]
            }
        env:
          SLACK_WEBHOOK_URL: ${{ secrets.SLACK_G_ORCHESTRATION_WEBHOOK_URL }}
          SLACK_WEBHOOK_TYPE: INCOMING_WEBHOOK