Under The CTF
This code runs at https://underthectf.com.
Capture The Flag (CTF) Challenges
This repository contains standalone software puzzles, some of which are security-themed.
For instructions on how to set up and access the simple dashboard, please see below.
Some of the challenges are intended to be solved without reading the source. Everything you need should be in the dashboard.
- Install Python 3, pip, and Docker:
apt install python3-pip docker.io.
pip3 install --upgrade docker-compose pyyaml
sudo ./run.sh # sudo, or add yourself to the "docker" group
- Wait for the Docker containers to build.
- Browse to http://localhost/.
Tested on Ubuntu 18.04 with Python 3.6.
A session is automatically created and stored in a cookie. If your cookie is deleted, a new session will be created for you.
If you change challenge metadata, please run
This collects static files and database entries for the scoreboard.
Then, you can do
./run.sh as normal.
python3 config/prepare_scoreboard.py --tls to configure
HTTPS for the web server. Place the certificate chain at
scoreboard/under-the-ctf.chain and the key at
The CTF should also run with Vagrant, for deployment inside a VM.
The Vagrantfile will tweak the docker-compose file and the
challenge, but things should work out of the box.
sudo apt install vagrant virtualbox vagrant up --provision curl localhost:8080