Capture-the-Flag: Rear Hatch
My workplace recently introduced an internal Capture the Flag competition, where teams could sign up and compete against each other to solve cyber security challenges. The competition itself is hosted by MetaCTF , and this is the start of a series of posts on how to solve certain issues. Per the terms on their website, I will only post solutions on retired challenges and not on any currently active challenges.
The challenge today is “Rear Hatch”, which describes a maintenance application that was developed by a contractor, and the company is worried that they may have left a backdoor in the code. Thankfully, they have the source code, and it gives us a great starting point to analyze it.
Read more →