Following my previous blog post (Fusion level 05 solution), I continued my nightly quest for fun and solved the next challenge as well. As I try to keep my content unique and original, this blog post is mostly created due to the fact that as for today, there was no solution for this challenge on the internet.
This time we will examine the danger of unsafe shared data structures between multiple threads, as well as function arguments type mismatch causing an integer overflow leading to stack overrun exploit. In this blog post i will cover the concepts of controllable threads race-conditions, stack overflowing while making sure the flow of the program remains safe to the end of the function, where the return address is overwritten.
So let’s get to it.
Tag: buffer overflow
Fusion – Level 05 solution
exploit-exercises.com provides a variety of virtual machines, documentation and challenges that can be used to learn about a variety of computer security issues such as privilege escalation, vulnerability analysis, exploit development, debugging, reverse engineering, and general cyber security issues. The exercise talked about in this blog post can be found here:
https://exploit-exercises.com/fusion/level05/
I am writing this blog post because I saw no solution similar to mine over the internet. Hopefully exposing my method and techniques, I will be able to enrich others knowledge and methodology.