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 CTFrun.sh
- shell script to run the challenge locally (uses Docker and sometimes docker-compose)public/
- files that were public/to downloadprivate/
- sources and other unlisted filesflag.txt
/metadata.json
- the flag (don't look there?)solv/
- scripts and files with raw solution (used by healthcheck, if exists)- other files
Challenges
Category | Name | Points | Solves |
---|---|---|---|
web | Baby CSP | 406 | 6 |
web | njs | 394 | 7 |
web | Computeration Fixed | 333 | 14 |
web | Go-fs | 256 | 30 |
web | Computeration | 121 | 103 |
re | REmap | 383 | 8 |
re | Rusty | 363 | 10 |
re | ABNF: grammar is fun | 283 | 23 |
re | debug_me_if_you_can | 279 | 24 |
re | reklest | 164 | 70 |
re | That's not crypto | 50 | 254 |
pwn | Pinata | 474 | 2 |
pwn | qmail | 363 | 10 |
pwn, misc | D0cker | 231 | 38 |
pwn, misc | MyLittlePwny | 50 | 214 |
misc, stegano, ppc | Steganography 2.0 | 500 | 0 |
misc, web, re, pwn | PainterHell | 500 | 0 |
misc | The survey | 500 | 0 |
misc, web | Forgotten name | 72 | 160 |
misc | Sanity Check | 50 | 764 |
fore, misc | Remote Password Manager | 347 | 12 |
fore, misc | PDF is broken, and so is this file | 67 | 166 |
crypto | Oracles | 383 | 8 |
crypto | 25519 | 199 | 51 |
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.