This action can be used to help you add some additional checks to help you secure your Docker Images in your CI. This would help you attain some confidence in your docker image before pushing them to your container registry or a deployment.

It internally uses Trivy and Dockle for running certain kinds of scans on these images.

• Trivy helps you find the common vulnerabilities within your docker images.
• Dockle is a container linter, which helps you identify if you haven't followed
  • Certain best practices while building the image
  • CIS Benchmarks to secure your docker image

The action generates an output file consisting of detailed description of all the detected vulnerabilities and best practice violations in JSON format. This file can be accessed by using the output variable scan-report-path.

In case you would like the action to ignore any vulnerabilities and best practice checks, create an allowedlist file at the path .github/containerscan/allowedlist.yaml in your repo. Here's an example allowedlist.yaml file.

general:
  vulnerabilities:
    - CVE-2003-1307
    - CVE-2007-0086
    - CVE-2019-3462
    - CVE-2011-3374
  bestPracticeViolations:
    - CIS-DI-0005
    - DKL-LI-0003
    - CIS-DI-0006
    - DKL-DI-0006

Install Scanitizer (currently in Beta) on your repository for more convenient management of allowedlist file.

- uses: azure/container-scan@v0
  with:
    image-name: my-image

- uses: azure/container-scan@v0
  with:
    image-name: loginServerUrl/my-image # loginServerlUrl would be empty if it's hosted on dockerhub
    username: ${{ secrets.DOCKER_USERNAME }}
    password: ${{ secrets.DOCKER_PASSWORD }}

The following is an example of not just this action, but how this action could be used along with other actions to setup a CI.

Where your CI would:

• Build a docker image
• Scan the docker image for any security vulnerabilities
• Publish it to your private container registry.

on: [push]

jobs:
  build-secure-and-push:
    runs-on: ubuntu-latest
    steps:
    - uses: actions/checkout@master

    - run: docker build . -t contoso.azurecr.io/k8sdemo:${{ github.sha }}
      
    - uses: Azure/container-scan@v0
      with:
        image-name: contoso.azurecr.io/k8sdemo:${{ github.sha }}
    
    - uses: Azure/docker-login@v1
      with:
        login-server: contoso.azurecr.io
        username: ${{ secrets.REGISTRY_USERNAME }}
        password: ${{ secrets.REGISTRY_PASSWORD }}
    
    - run: docker push contoso.azurecr.io/k8sdemo:${{ github.sha }}

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This project has adopted the Microsoft Open Source Code of Conduct. For more information see the Code of Conduct FAQ or contact [email protected] with any additional questions or comments.