After having played the EKOParty pre-CTF a few week backs, I decided to take a quick look at what the conference CTF finals looked like. Unlike the pre-CTF, the finals CTF only ran for a couple of days rather than a whole week. I thought I'd warm up a little [...]

I decided to spend some time on this challenge given my little ruby experience; figured I could learn a thing or two. The source for the challenge showed that the logic consisted of two real stages. The user input was first checked for size and content. It was then passed to the eval command, [...]