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Vuln. scan #168
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| # This is a GitHub workflow defining a set of jobs with a set of steps. | |
| # ref: https://docs.github.com/en/actions/learn-github-actions/workflow-syntax-for-github-actions | |
| # | |
| # This workflow use aquasecurity/trivy to scan the images we have published for | |
| # known vulnerabilities. If there are such that can be patched, we let this | |
| # workflow fail to signal that unless we make an exception, which we do for the | |
| # singleuser-sample image only. | |
| # | |
| name: Vuln. scan | |
| on: | |
| pull_request: | |
| paths: | |
| - ".github/workflows/vuln-scan.yaml" | |
| schedule: | |
| # At 00:00 - https://crontab.guru | |
| - cron: "0 0 * * *" | |
| workflow_dispatch: | |
| jobs: | |
| trivy_image_scan: | |
| if: github.repository == 'jupyterhub/zero-to-jupyterhub-k8s' | |
| runs-on: ubuntu-20.04 | |
| # Write permissions granted for the peter-evans/create-pull-request action | |
| # to push to a branch and create/update a PR | |
| permissions: | |
| contents: write | |
| pull-requests: write | |
| strategy: | |
| fail-fast: false | |
| matrix: | |
| include: | |
| - image_ref: hub | |
| accept_failure: false | |
| - image_ref: secret-sync | |
| accept_failure: false | |
| - image_ref: network-tools | |
| accept_failure: false | |
| - image_ref: image-awaiter | |
| accept_failure: false | |
| - image_ref: singleuser-sample | |
| accept_failure: false | |
| steps: | |
| - uses: actions/checkout@v2 | |
| with: | |
| # chartpress requires git history to set chart version and image tags | |
| # correctly | |
| fetch-depth: 0 | |
| - uses: actions/setup-python@v2 | |
| with: | |
| python-version: "3.8" | |
| - name: Install chartpress | |
| run: | | |
| pip install chartpress | |
| # charpress --list-images output lines of name:tag format. We use it with | |
| # a search string in matrix.image_ref to find the specific image to scan | |
| # in this job. | |
| - name: Identify image name:tag | |
| id: image | |
| run: | | |
| IMAGE_SPEC=$( | |
| chartpress --list-images \ | |
| | grep ${{ matrix.image_ref }}: | |
| ) | |
| echo "Identified image: $IMAGE_SPEC" | |
| echo "::set-output name=spec::$IMAGE_SPEC" | |
| echo "::set-output name=name::$(echo $IMAGE_SPEC | sed 's/\(.*\):.*/\1/')" | |
| echo "::set-output name=tag::$(echo $IMAGE_SPEC | sed 's/.*:\(.*\)/\1/')" | |
| - name: Create ./tmp dir | |
| run: mkdir ./tmp | |
| # Action reference: https://github.com/aquasecurity/trivy-action | |
| - name: Scan latest published image | |
| id: scan_1 | |
| uses: aquasecurity/trivy-action@8f4c7160b470bafe4299efdc1c8a1fb495f8325a | |
| with: | |
| image-ref: ${{ steps.image.outputs.spec }} | |
| format: json # ref: https://github.com/aquasecurity/trivy#save-the-results-as-json | |
| output: tmp/scan_1.json | |
| ignore-unfixed: true | |
| exit-code: "1" | |
| # Keep running the subsequent steps of the job, they are made to | |
| # explicitly adjust based on this step's outcome. | |
| continue-on-error: true | |
| # Steps below is only executing if vulnerabilities have been detected. | |
| # ----------------------------------------------------------------------- | |
| - name: Rebuild image | |
| id: rebuild | |
| if: steps.scan_1.outcome == 'failure' | |
| run: | | |
| docker build -t rebuilt-image images/${{ matrix.image_ref }} | |
| - name: Scan rebuilt image | |
| id: scan_2 | |
| if: steps.rebuild.outcome == 'success' | |
| uses: aquasecurity/trivy-action@8f4c7160b470bafe4299efdc1c8a1fb495f8325a | |
| with: | |
| image-ref: rebuilt-image | |
| format: json # ref: https://github.com/aquasecurity/trivy#save-the-results-as-json | |
| output: tmp/scan_2.json | |
| ignore-unfixed: true | |
| # Analyze the scan reports. If they differ, we want to proceed and create | |
| # or update a PR. We use a hash from the final scan report as an | |
| # indication to rebuild or not. | |
| - name: Analyze scan reports | |
| id: analyze | |
| if: steps.rebuild.outcome == 'success' | |
| run: | | |
| echo "::set-output name=utc_time::$(date --utc +'%F_%T')" | |
| json_to_misc() { | |
| # Count vulnerabilities | |
| VULNERABILITY_COUNT="$(cat tmp/scan_$1.json | jq -r '[.Results[].Vulnerabilities | select(type != null)] | add | select(. != null) | length')" | |
| echo "VULNERABILITY_COUNT_$1=$VULNERABILITY_COUNT" >> $GITHUB_ENV | |
| # Construct a markdown summary | |
| if [[ "$VULNERABILITY_COUNT" == "0" ]]; then | |
| echo "No vulnerabilities! :tada:" >> tmp/md_summary_$1.md | |
| else | |
| echo "Target | Vuln. ID | Package Name | Installed v. | Fixed v." >> tmp/md_summary_$1.md | |
| echo "-|-|-|-|-" >> tmp/md_summary_$1.md | |
| cat tmp/scan_$1.json | jq -r '.Results[] | select(.Vulnerabilities != null) | .Type + " | " + (.Vulnerabilities[] | .VulnerabilityID + " | " + .PkgName + " | " + .InstalledVersion + " | " + .FixedVersion)' | sort >> tmp/md_summary_$1.md | |
| fi | |
| # Use hack to set a multiline string output | |
| # ref: https://github.com/actions/toolkit/issues/403#issue-593398879 | |
| TMP=$(cat tmp/md_summary_$1.md) | |
| TMP="${TMP//'%'/'%25'}" | |
| TMP="${TMP//$'\n'/'%0A'}" | |
| TMP="${TMP//$'\r'/'%0D'}" | |
| echo "::set-output name=md_summary_$1::$TMP" | |
| # Calculate a hash of the markdown summary | |
| HASH=$(cat tmp/md_summary_$1.md | sha1sum) | |
| HASH=${HASH:0:10} | |
| export HASH_$1=$HASH | |
| echo "::set-output name=hash_$1::$HASH" | |
| } | |
| json_to_misc 1 | |
| json_to_misc 2 | |
| # Did rebuilding the image change anything? | |
| if [ "$HASH_1" == "$HASH_2" ]; then | |
| echo "::set-output name=proceed::no" | |
| echo "No vulnerabilities were patched by rebuilding the image - won't proceed!" | |
| else | |
| echo "::set-output name=proceed::yes" | |
| echo "Vulnerabilities were patched by rebuilding the image - will proceed!" | |
| fi | |
| - name: Describe vulnerabilities | |
| if: steps.rebuild.outcome == 'success' | |
| uses: aquasecurity/trivy-action@8f4c7160b470bafe4299efdc1c8a1fb495f8325a | |
| with: | |
| image-ref: rebuilt-image | |
| format: table | |
| ignore-unfixed: true | |
| - name: Decision to not proceed | |
| if: steps.analyze.outputs.proceed == 'no' | |
| run: | | |
| echo "::warning::None of the $VULNERABILITY_COUNT_1 vulnerabilities got patched by rebuilding the image :(" | |
| continue-on-error: ${{ matrix.accept_failure == true }} | |
| # Steps below are executed if the analyze step decided to proceed. | |
| # ----------------------------------------------------------------------- | |
| # Searches for the "# VULN_SCAN_TIME=..." in the Dockerfile and sets a new | |
| # value, which can be used to submit a PR that when merged will trigger a | |
| # rebuild of the image. | |
| - name: Update VULN_SCAN_TIME in Dockerfile | |
| if: steps.analyze.outputs.proceed == 'yes' | |
| run: | | |
| value_to_set="${{ steps.analyze.outputs.utc_time }}" | |
| file_to_update="images/${{ matrix.image_ref }}/Dockerfile" | |
| sed --in-place "s/\(#.*VULN_SCAN_TIME=\)\(.*\)/\1${value_to_set}/" "$file_to_update" | |
| git --no-pager diff --color=always | |
| # The create-pull-request action is smart enough to only create/update a | |
| # PR if there is a change to anything not .gitignored. A change will be | |
| # made only if the analyze steps outputted hash is changed. | |
| # | |
| # ref: https://github.com/peter-evans/create-pull-request | |
| - name: Create or update a PR | |
| if: steps.analyze.outputs.proceed == 'yes' && github.event_name != 'pull_request' | |
| uses: peter-evans/create-pull-request@dcd5fd746d53dd8de555c0f10bca6c35628be47a | |
| with: | |
| token: "${{ secrets.GITHUB_TOKEN }}" | |
| author: jupyterhub vuln-scan bot <noreply@github.com> | |
| reviewers: consideratio | |
| branch: vuln-scan-${{ matrix.image_ref }} | |
| title: Vulnerability patch in ${{ matrix.image_ref }} | |
| labels: image:rebuild-to-patch-vuln | |
| body: | | |
| A rebuild of `${{ steps.image.outputs.name }}` has been found to influence the detected vulnerabilities! This PR will trigger a rebuild because it has updated a comment in the Dockerfile. | |
| ## About | |
| This scan for known vulnerabilities has been made by [aquasecurity/trivy](https://github.com/aquasecurity/trivy). Trivy was configured to filter the vulnerabilities with the following settings: | |
| - ignore-unfixed: `true` | |
| ## Before | |
| Before trying to rebuild the image, the following vulnerabilities was detected in `${{ steps.image.outputs.spec }}`. | |
| ${{ steps.analyze.outputs.md_summary_1 }} | |
| ## After | |
| ${{ steps.analyze.outputs.md_summary_2 }} | |
| commit-message: | | |
| Patch known vulnerability in ${{ matrix.image_ref }} |