Now that I’ve completed all of the Stack section of protostar, I’ve started to move onto Heap. The first of these challenges, is Heap 0. We are given the following code: #include <stdlib.h> #include <unistd.h> #include <string.h> #include <stdio.h> #include …

Welcome everyone to 2012! I took a bit of a break during these holidays, and am just starting to get back going. This challenge was very interesting to me. I figured it would build off of the previous one. However, it was its own standalone challenge. We are given the following code to the stack7 …

The Stack6 challenge was definitely a learning experience for me. This actually went beyond my existing skills, and made me learn some new stuff. We are given the following code. #include <stdlib.h> #include <unistd.h> #include <stdio.h> #include <string.h> void getpath() { …

Wow, this challenge was a tough one for me. I ran into some huge problems that I had to work out. Considering this is a “standard buffer overflow”, I figured it’d be as easy as some of the others I’ve done in the past. I’ll explain my frustrations inline. First, …

With this challenge, I think things really start to get fun, and more real-world. We are provided with the following C program: #include <stdlib.h> #include <unistd.h> #include <stdio.h> #include <string.h> void win() { printf("code flow successfully changed\n"); } …

This challenge starts getting a little bit more involved than the previous ones. Instead of just providing a new value for the “modified” variable, we need to make the code jump to a method, changing the execution. #include <stdlib.h> #include <unistd.h> #include …