downbtn

#!/bin/bash

# by me

CODE="ZZZ"
if [[ $# -lt 1 ]]; then
    read -p "Enter nearest airport code: "
else
    CODE="${1}"
fi

downbtn

#!/usr/bin/env python3
"""(c) copyright 2023 Daniel Ha

Permission is hereby granted, free of charge, to any person obtaining a copy of
this software and associated documentation files (the “Software”), to deal in
the Software without restriction, including without limitation the rights to
use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
of the Software, and to permit persons to whom the Software is furnished to do
so, subject to the following conditions:

downbtn

package main

import (
	"flag"
	"fmt"
	"log"
	"os"
	"os/signal"
	"strconv"

downbtn

UIUCTF 2022 - frame [web50]

Summary: This was one of the beginner challenges for UIUCTF 2022. Use fake image headers to disguise a php script as an image, upload it and get the flag.

We made it easy to add a frame to your digital art!

https://frame-web.chal.uiuc.tf/

downbtn

UIUCTF 2021 - Pwn Warmup

writeup by downbtn

Quick summary: A fairly straightforward buffer overflow pwn challenge. Smash the stack and overwrite the saved instruction pointer with a value provided by the program. In this writeup I've tried to write in such a way that someone who is very new to CTFs and has little experience with pwn could understand my full reasoning. This means that a veteran player might find this writeup a bit tedious to read, but I hope y'all can bear with me :^)

Challenge Description

Pwn Warmup

Points: 50

downbtn

#!/usr/bin/env python

MORSE_CODE_DICT = {
    'A': '.-',
    'B': '-...',
    'C': '-.-.',
    'D': '-..',
    'E': '.',
    'F': '..-.',
    'G': '--.',