Buffer overflow (off by 1) exploit

Показать описание

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

Рекомендации по теме

Комментарии

Why 100 of those return addresses and why did you change the start address of the buffer?

gudimetlakowshik

so I can sort of the shell to spawn, but when i continue, it justs exits normally and says inferior.

kooners

When I hit continue, it says that program is not being run.

kooners

Hi, man, I had a question that you created a buffer size 1024, but cause a overflow by 'A'*1024. How could it be? It should be a normal execution?

BobSmith-shjq

Plus I can't even perform a buffer overflow attack with A's.

kooners

Buffer overflow (off by 1) exploit

Buffer overflow (off by 1) exploit

Hacker Techniques Introduction to Buffer Overflows

How to exploit a buffer overflow vulnerability - Practical

Off by One BufferOverflow

Off by One Overflows (Video solution)

buffer overflow demo #1 application crash / segmentation fault

how do hackers exploit buffers that are too small?

Overwriting RBP with an Off-by-One Buffer Overflow - Cake - [Intigriti 1337UP LIVE CTF 2022]

#140 Arduino C++ Lesson 25 - Serial Communication Part 1

Off By one Overflow Exploitation - 100% Technical - on ubuntu 16.04 - june 2016

OWASP - WebGoat - Buffer Overflows - Off By One Overflows

OWASP WebGoat - Buffer Overflows - Off By One Overflow

Stack Buffer Overflows - a primer on smashing the stack using CVE-2017-11882

Practical exploitation of a Buffer Overflow vulnerable C program

Buffer Overflow 101: Ep 2 - Buffer Overflow Demo

Exploiting a Simple Buffer Overflow Tutorial on Windows

Exploiting Off By One Vulnerabilities

Buffer overflow - Integer Overflow

One Byte Buffer Overflows

Kioptrix Level 1 - Remote Buffer Overflow in mod_ssl

Buffer Overflows can Redirect Program Execution - bin 0x0D

[NDH2010] level 1 : basic buffer overflow

Behemoth 1 | A's That Unlock Secrets (Buffer Overflow) | OverTheWire Wargames

Introduzione alla Binary Exploitation (ft. 'Smashing The Stack For Fun And Profit')