Conclusion

In this chapter, you learned the basics of stack-based buffer overflows. Stack overflows take advantage of data stored in the stack. The goal is to inject instructions into a buffer and overwrite the return address. With the return address overwritten, you will have control of the program's execution flow. From here, you insert shellcode, or instructions to spawn a root shell, which is then executed. A large portion of the rest of this book covers more advanced stack overflow topics.