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How to use Docker for container security scanning and vulnerability repair

Nov 07, 2023 pm 02:32 PM
Bug fixes docker container security scan

How to use Docker for container security scanning and vulnerability repair

Docker has become one of the indispensable tools for developers and operators because of its ability to package applications and dependencies into containers for portability. However, when using Docker, we must pay attention to the security of the container. If we're not careful, security holes in containers can be exploited, leading to data leaks, denial-of-service attacks, or other dangers. In this article, we will discuss how to use Docker for security scanning and vulnerability repair of containers, and provide specific code examples.

  1. Container security scanning

Container security scanning refers to detecting potential security vulnerabilities in containers and taking timely measures to repair them. Security scanning in containers can be achieved by using some open source tools.

1.1 Use Docker Bench for security scanning

Docker Bench is an open source tool that can perform basic security checks on Docker containers. The following are the steps to use Docker Bench for container security scanning:

(1) First, install Docker Bench

docker pull docker/docker-bench-security
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(2) Then scan the container

docker run -it --net host --pid host --userns host --cap-add audit_control 
    -e DOCKER_CONTENT_TRUST=$DOCKER_CONTENT_TRUST 
    -v /etc:/etc:ro 
    -v /var/lib:/var/lib:ro 
    -v /usr/bin/docker-containerd:/usr/bin/docker-containerd:ro 
    -v /usr/bin/docker-runc:/usr/bin/docker-runc:ro 
    -v /usr/lib/systemd:/usr/lib/systemd:ro 
    -v /var/run/docker.sock:/var/run/docker.sock:ro 
    --label docker_bench_security 
    docker/docker-bench-security
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(3 )Wait for the scan to complete and view the report

After the scan is completed, we can view the report and take corresponding repair measures.

1.2 Security Scanning with Clair

Clair is an open source tool that can scan Docker images and containers to detect security vulnerabilities in them. The following are the steps to use Clair for container security scanning:

(1) First, install Clair

docker pull quay.io/coreos/clair:latest
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(2) Then, start Clair

docker run -p 6060:6060 -d --name clair quay.io/coreos/clair:latest
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(3) Next , install clairctl

go get -u github.com/jgsqware/clairctl
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(4) Then, use clairctl to scan the container

clairctl analyze -l CONTAINER_NAME
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(5) Wait for the scan to complete and view the report

After the scan is completed, we can Access Clair's web page through your browser and view the report.

  1. Container vulnerability repair

Container vulnerability repair refers to repairing security vulnerabilities existing in the container to ensure the security of the container. Container vulnerability repair can be achieved using some open source tools.

2.1 Use Docker Security Scanning for vulnerability repair

Docker Security Scanning is a security scanning tool officially provided by Docker. It can detect security vulnerabilities in Docker images and provide repair suggestions. The following are the steps to use Docker Security Scanning to repair container vulnerabilities:

(1) First, activate Docker Security Scanning

After registering an account on Docker Hub, enable Docker Security Scanning in the Security Center .

(2) Then, upload the image to Docker Hub

docker push DOCKERHUB_USERNAME/IMAGE_NAME:TAG
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(3) Wait for Docker Security Scanning to complete the scan and view the report

Log in to Docker Hub through the browser, and View the Docker Security Scanning scan report for repair suggestions.

2.2 Use Clair for vulnerability repair

In addition to container security scanning, Clair can also be used to repair container vulnerabilities. The following are the steps to use Clair to repair container vulnerabilities:

(1) First, start Clair

docker run -p 6060:6060 -d --name clair quay.io/coreos/clair:latest
Copy after login
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(2) Then, install clairctl

go get -u github.com/jgsqware/clairctl
Copy after login
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(3) Next, Use clairctl to scan the container

clairctl analyze -l CONTAINER_NAME
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(4) Finally, use clairctl to perform repair operations

clairctl fix -l CONTAINER_NAME
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It should be noted that Clair can only provide repair suggestions and cannot automatically repair vulnerabilities, so repair The operation needs to be done manually.

Summary

Container security scanning and vulnerability repair are important links in container security management. This article introduces the method of container security scanning and vulnerability repair based on two open source tools, Docker Bench and Clair, and provides specific code examples. Using these tools, we can promptly discover and repair potential security vulnerabilities in containers, thereby ensuring the security of containers.

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