10: Bypassing Stack Canaries (leak + write) - Buffer Overflows - Intro to Binary Exploitation (Pwn)

10th video from the "Practical Buffer Overflow Exploitation" course covering the basics of Binary Exploitation. NX and stack canaries are enabled this time, so we'll use a printf() format string vulnerability leak the stack canary, allowing us to overwrite it with the expected value. We'll use checksec, ghidra, pwndbg and pwntools! Write-ups/tutorials aimed at beginners - Hope you enjoy 🙂 #BinaryExploitation #BufferOverflow #BinExp #RE #Pwn #PwnTools

Find the binary files, source code and scripts to go with the series @ https://github.com/Crypto-Cat/CTF/tree/main/pwn/binary_exploitation_101

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↢Binary Exploitation / Reverse Engineering↣
Pwn.College: https://pwn.college
How2Heap: https://github.com/shellphish/how2heap
NightMare: https://guyinatuxedo.github.io
Ir0nstone: https://ir0nstone.gitbook.io/notes/types/stack
PinkDraconian: https://www.youtube.com/playlist?list=PLeSXUd883dhjmKkVXSRgI1nJEZUDzgLf_
More: https://github.com/Crypto-Cat/CTF#readme

↢Resources↣
Ghidra: https://ghidra-sre.org/CheatSheet.html
PwnTools: https://github.com/Gallopsled/pwntools-tutorial
CyberChef: https://gchq.github.io/CyberChef
HackTricks: https://book.hacktricks.xyz/exploiting/linux-exploiting-basic-esp
GTFOBins: https://gtfobins.github.io
Decompile Code: https://www.decompiler.com
Run Code: https://tio.run

↢Chapters↣
Start: 0:00
Basic File Checks: 0:25
Review Source Code: 2:06
Disassemble with Ghidra: 3:05
Outline Attack (Canary Leak + Write): 3:56
Fuzz Printf Format Vuln for Canary: 5:23
Locating Canaries with GDB-PwnDbg: 6:42
PwnTools Exploit Script: 10:37
Additional Pwn/CTF Resources: 12:57
End: 14:38