ACSC 2023 Challenge Repository

The format is based on zer0pts CTF repository. This might change based on the design of the scoreboard.

Directory Structure

The directory for each challenge is /<category>/<challenge_name>. The challenge directory has 3 folders: challenge, distfiles, and solution.

• challenge: Files necessary for building the task (source code, flag, etc)
• distfiles: Files to be distributed to the players (if any)
• solution: Scripts of the intended solution

Along with the 3 folders, you must put task.yml. (See the next section.)

If your task runs on docker, you can put docker-compose.yml and Dockerfile right under the challenge directory.

Example:

.
|-- pwn/
|    |-- histogram/
.    .    |-- challenge/
.    .    |-- distfiles/
.    .    |-- solution/
          |-- Dockerfile
          |-- docker-compose.yml
          +-- task.yml

Challenge Information

You need to provide the information of your task in YAML format in task.yml. The file must contain the following information:

• name: Challenge name
• description: Challenge description (HTML)
• flag: FLAG
• author: Challenge author
• tags: Choose tags from pwn, web, crypto, rev, forensics, hardware, ppc, warmup

Additionally, you can put the following information:

• port: Port number

The tokens {host} and {port} in task.yml are converted into the host name and port number respectively.

Example 1:

---
name: "welcome"
description: >
  <p>The flag is written in Discord</p>
flag: "ACSC{W3lc0m3W3lc0m3}"
author: "ACSC organization"
tags:
- welcome

Example 2:

---
name: "just nc"
description: >
  <p>Just nc</p><br>
  <code>nc {host} {port}</code>
flag: "ACSC{hogehogehugahuga}"
author: ptr-yudai
port: 1337
tags:
- pwn
- warmup