Harmony is the sleek and minimalist chat application poised to replace Discord, offering users a clutter-free and straightforward platform for seamless communication and collaboration.

It is strongly recommended to test everything locally and do not connect your client to the public instance directly for your own safety.

Project Structure

• client: Client source code (This is the main part of the challenge, focus on this)
• server: Server source code (No intended vulnerability here, you can ignore this)
• bot: The container for the bot (This shows how the bot will interact with the server, and you need to get RCE in this)
• spawner: A simple instancer for spawning bots (You can ignore this)

Run this challenge locally

Requirements

• Node.js 18
• Yarn 1
• Docker

Commands

(
    cd client; yarn && yarn build
)
cp -r client/release/0.0.0/linux-unpacked bot
(
    cd bot; musl-gcc readflag.c -o readflag -static -Os -s -DFLAG='"flag{asd}"'
)
./spawner/update.sh
docker compose up --build