Bauhinia CTF 2023 Writeup

CTFTime event link: https://ctftime.org/event/1960

Writeups

• Web:
  1. Hansel and Gretel (Second blooded)
  2. Isekai Tensei Hakka (Unsolved)

Background

• Starts: 19 August 2023, 00:00 UTC
• Ends: 21 August 2023, 00:00 UTC

Black Bauhinia’s first CTF.

There will be a number of (subjectively) fun challenges hand-crafted in Hong Kong.

Categories:

• Crypto
• Pwn
• Reverse
• Web
• Misc

Overview

• Team: JHDiscord
• Team Solves: 3/25
• Individual Solves: 3/25
• Score: 190
• Rank: 44/205
• Overall Difficulty To Me: ★★★★★★★★★★

What I’ve learned in this CTF

• Web:
  1. Overwriting Flask’s secret via class pollution (Hansel and Gretel) (Second blooded)
  2. Isekai Tensei Hakka (Unsolved)