Deliberately vulnerable CI/CD environment. Hack CI/CD pipelines, catch the flags. 🚩

Created by Cider Security.

Table of Contents

• Description
• Download & Run
  • Linux & Mac
  • Windows (Powershell)
• Usage
  • Instructions
  • Take the challenge
  • Troubleshooting
• Solutions
• Contributing
  • Development
  • Checklist

Description

The CI/CD Goat project allows engineers and security practitioners to learn and practice CI/CD security through a set of 10 challenges, enacted against a real, full blown CI/CD environment. The scenarios are of varying difficulty levels, with each scenario focusing on one primary attack vector.

The challenges cover the Top 10 CI/CD Security Risks, including Insufficient Flow Control Mechanisms, PPE (Poisoned Pipeline Execution), Dependency Chain Abuse, PBAC (Pipeline-Based Access Controls), and more.
The different challenges are inspired by Alice in Wonderland, each one is themed as a different character.

The project’s environment is based on Docker images and can be run locally. These images are:

1. Gitea (minimal git server)
2. Jenkins
3. Jenkins agent
4. LocalStack (cloud service emulator that runs in a single container)
5. Lighttpd
6. CTFd (Capture The Flag framework).

The images are configured to interconnect in a way that creates fully functional pipelines.

Download & Run

There's no need to clone the repository.

Linux & Mac (Intel chip)

curl -o cicd-goat/docker-compose.yaml --create-dirs https://raw.githubusercontent.com/cider-security-research/cicd-goat/main/docker-compose.yaml
cd cicd-goat && docker-compose up -d

Mac (Apple chip)

1. curl -o cicd-goat/docker-compose.yaml --create-dirs https://raw.githubusercontent.com/cider-security-research/cicd-goat/main/docker-compose.yaml
2. cd cicd-goat && docker-compose up -d jenkins_server
3. Wait for Jenkins to fully boot.
4. docker-compose up -d

Windows (Powershell)

mkdir cicd-goat; cd cicd-goat
curl -o docker-compose.yaml https://raw.githubusercontent.com/cider-security-research/cicd-goat/main/docker-compose.yaml
get-content docker-compose.yaml | %{$_ -replace "bridge","nat"}
docker-compose up -d

Usage

Instructions

• Spoiler alert! Avoid browsing the repository files as they contain spoilers.
• To configure your git client for accessing private repositories we suggest cloning using the http url.
• In each challenge, find the flag - in the format of flag# (e.g flag2), or another format if mentioned specifically.
• If needed, use the hints on CTFd.
• There is no need to exploit CVEs.
• No need to hijack admin accounts of Gitea or Jenkins (named "admin" or "red-queen").

Take the challenge

1. Login to CTFd at http://localhost:8000 to view the challenges:

   • Username: alice
   • Password: alice

2. Hack:

   • Jenkins http://localhost:8080
     • Username: alice
     • Password: alice
   • Gitea http://localhost:3000
     • Username: thealice
     • Password: thealice

3. Insert the flags on CTFd and find out if you got it right.

Troubleshooting

• If Gitea shows a blank page, refresh the page.
• When forking a repository, don't change the name of the forked repository.

Solutions

Warning: Spoilers! 🙈

See Solutions.

Contributing

Development

1. Clone the repository.

2. Rename .git folders to make them usable:
   

   python3 rename.py git

3. Install testing dependencies:

   pip3 install pipenv
   pipenv install --deploy

4. Run the development environment to experiment with new changes:

   rm -rf tmp tmp-ctfd/
   cp -R ctfd/data/ tmp-ctfd/
   docker-compose -f docker-compose-dev.yaml up -d

5. Make the desired changes:

   • All services except CTFd are completely configured as code so desired changes should be made to the files in the appropriate folders.
   • To make changes in CTFd, use the admin credentials.

6. Shutdown the environment, move changes made in CTFd and rebuild it:

   docker-compose -f docker-compose-dev.yaml down
   ./apply.sh # save CTFd changes
   docker-compose -f docker-compose-dev.yaml up -d --build

7. Run tests:

   pytest tests/

8. Rename .git folders to allow push:

   python3 rename.py notgit

9. Commit and push!

Checklist

Follow the checklist below to add a challenge:

1. CTFd:
   1. Write challenge description.
   2. Choose category according to difficulty level.
   3. Make sure the challenge is visible and has value according to difficulty.
   4. Write hints in order of usage.
   5. Add a flag. Make sure to select if it's case-insensitive.
2. Gitea:
   1. Configure a new repository in gitea.yaml.
   2. Create the repository under gitea/repositories. Use an open-source repository that use the MIT license as a template for the challenge repository.
3. Jenkins:
   1. Configure Jenkins and add new jobdsl files in the casc.yaml file.
   2. Make sure jobs don't run periodically. Jobs should be triggered by events / polling.
   3. Validate that the new challenge doesn't interfere with other challenges.
4. Make sure the flag is not accessible when solving other challenges.
5. Write tests.
6. Write the solution.
7. Update README.md if needed.