Скачать или смотреть Buffer overflow (off by 1) exploit

This video demonstrates how to exploit a program where the buffer can be overflowed by one.

Compilation line:
gcc -fno-stack-protector -m32 -mpreferred-stack-boundary=2 -z execstack -o offby offby.c
Note that '-mpreferred-stack-boundary=2' is used to ensure that the esp occurs directly after the buffer. Without this program is likely not exploitable on most linux distributions

NOTE: If this tutorial is not working it is likely that you have aslr enabled. To disable it run the following command in your terminal
echo 0 | sudo tee /proc/sys/kernel/randomize_va_space
When you are finished I strongly recommend you turn it back on with the command
echo 2 | sudo tee /proc/sys/kernel/randomize_va_space