justCTF [*] 2020

This repo contains sources for justCTF [*] 2020 challenges hosted by justCatTheFish.

TLDR: Run a challenge with ./run.sh (requires Docker/docker-compose and might require sudo as we use nsjail extensively under the hood).

The challenges/ contains challanges directories with the following structure:

• README.md - official challenge description used during CTF
• run.sh - shell script to run the challenge locally (uses Docker and sometimes docker-compose)
• public/ - files that were public/to download
• private/ - sources and other unlisted files
• flag.txt/metadata.json - the flag (don't look there?)
• solv/ - scripts and files with raw solution (used by healthcheck, if exists)
• other files

Challenges

Write-ups

Write-ups can be found on CTFTime. You should also look at challenges solution directories, if they exist (solv/).

CTF Platform

We wrote our own CTF platform which is available here.

justCTF [*] 2020 was sponsored by

• Trail of Bits
• Wirtualna Polska