CSAW CTF 2014 - Reverse Engineering 100: "eggshells"

This is the first exploitation problem and it starts with the following text:

I trust people on the Internet all the time, do you?

Written by ColdHeat

eggshells-master.zip

Unzipping and Analyzing the Files

Let’s unzip the provided zip file:

$ unzip eggshells-master.zip

This creates a directory called eggshells-master ...