Blockchain challenge

With this bad implementation of blockhain, let's become a millionaire.

Pwnable.kr - cmd2

Once again we're going to exploit simple command filter.

Protostar - Stack 03

This time by using buffer overflow we're going to call a different function.

Protostar - Stack 02

By making sure we understand basics behind previous challenges, we're going to use the same technique with envriromental variables.