Скачать или смотреть PicoCTF Guessing Game 1 Binary Exploitation challenge walkthrough - ret2syscall (Stack Pivot).

pico ctf guessing game 1 pwn challenge writeup, ret2syscall and stack pivot.
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Chapters:
0:00 Intro
0:31 File the binary
0:45 Soruce Code review
0:54 First bug, psuedorandom number with rand()
1:28 Second bug, Buffer Overflow
1:53 A bit of a theory about syscalls and gadgets
4:00 Find pseudorandom number
5:00 Find the overflow offset
5:22 Exploit time