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Resolve Docker Vulnerabilities Agent Skill

Skill to resolve Docker vulnerabilities for the firebase-cli image. Use this skill when you need to check for vulnerabilities in the firebase-cli Docker image and address them.

657 tokens
context cost
the whole folder, loaded on every use
1
files
instructions only
0
copies elsewhere
how many repositories repackaged it
4450
stars on the repo
on the repository, not the skill itself

Install

one command, takes just this skill from the repository
npx skills add https://github.com/firebase/firebase-tools --skill resolve-docker-vulnerabilities

The instruction itself

7 sections, as written by the author

Resolve Docker Vulnerabilities

This skill guides you through the process of listing images, checking for vulnerabilities, planning remediation, and verifying the fixes by publishing to a staging repository.

Workflow

1. Publish to Staging

Run the build on fir-tools-builds and publish to the staging repository in firebase-cli to see the baseline vulnerabilities after the build's own updates.

./scripts/publish/firebase-docker-image/run.sh --build-project fir-tools-builds --repo staging --target firebase-cli

2. Check Vulnerabilities

Check the vulnerability reports for the image just pushed to staging. You will need to find the digest of the image first.

gcloud artifacts docker images list us-docker.pkg.dev/firebase-cli/staging/firebase

Then check vulnerabilities using the digest:

gcloud artifacts vulnerabilities list us-docker.pkg.dev/firebase-cli/staging/firebase@sha256:<DIGEST>

To investigate which layers and file paths are causing the vulnerabilities, run the command with --format=json:

gcloud artifacts vulnerabilities list us-docker.pkg.dev/firebase-cli/staging/firebase@sha256:<DIGEST> --format=json

Look for fileLocation and layerDetails in the output to understand if the vulnerability is in:

  • Project dependencies (e.g., under /usr/local/node_packages/node_modules). Recommend updating the package.json and running the build again. You can use overrides as needed here to upgrade transitive dependencies to non-breaking versions.
  • Global tools (e.g., under /usr/local/lib/node_modules/npm). Recommend waiting for upstream fixes (which will be pulled in as soon as they are available).
  • External binaries (e.g., emulator JARs under /root/.cache/firebase/emulators). Recommend raising these issues to the team owning the emulator.

3. Plan Remediation

For each vulnerable package identified:

  • Determine if it can be updated in the Dockerfile.
  • Check if a fix is available.
  • Create a plan to address it (e.g., upgrading the base image, upgrading the specific package).

4. Present Plan to User

Present the proposed plan to the user for approval before making changes.

5. Apply Fix and Re-Verify

After making changes to the Dockerfile or related files, repeat Step 1 and Step 2 to publish a new staged image and verify that the vulnerabilities have been resolved.

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How to use it

Copy the folder

Take firebase/resolve-docker-vulnerabilities from the repository into ~/.claude/skills for personal use, or into .claude/skills inside a project.

Check the name does not clash

The agent identifies a skill by the name field in its header. Two skills with the same name cannot sit side by side — one of them will be ignored.