Summary

Author: @JohnHammond

Wham! Bam! Amazon is entering the hacking business! Can you buy a flag?

Steps

I started the docker instance and navigated to the challenge and was presented with this game.

Selecting 1, I see there’s nothing in my inventory.

Going to the option to buy items, I see I can buy various items including a flag. However, the flag costs 1000000000, and I have 50 available to me. I went to purchase some apples and see each apple is 3 dollars. I purchased 3 apples at 3 dollars which removed 9 dollars from my account. I went back to purchase some more apples, but this time I put in -100000000000000. The way the game is calculating the purchase, it actually allow negative numbers which result in a positive dollar amount.

With enough money in my wallet, I go back and purchase the flag, but not before a quick round of rock, paper, scissors.

Flag: flag{18bdd83cee5690321bb14c70465d3408}