Binary Exploitation Workshop

Binary Exploitation Workshop
Segmentation fault (core dumped)
Art	Meet-Up
Relevant?	Yes

Binary Exploitation Workshop obsolete
Binary Exploitation Workshop
Ort	Chaosdorf
Beteiligt	ilias

Exploitation Workshop
Binary Exploitation Workshop
Art	Workshop
Datum	2019-08-05
Start	13:00
Host	ilias
Relevant?	Yes

Please read

Option 1:

   - Virtual machine software (VMWare, VirtualBox etc...)
   - Ubuntu 16.04 guest system(with binutils, gdb, python2.7, and the pwntools python module)
   - your C editor of choice

Option 2:

   This is the prefered method.
   - Install VirtualBox
   - Install Vagrant (wrapper for VirtualBox)
   - download this Vagrantfile
   - run vagrant up && vagrant ssh
   That will automatically create the ubuntuVM, install all the packages we need and setup a nice debugging environment.
   Another plus is that you will have exactly the same setup as me so debugging any problems is going to be easier.
   NOTE: The installation can take up to an hour.

This Workshop is for beginners. Beginner as in new to binary exploitation not as in new to low level stuff, c and assembly.

We'll try to briefly cover the usage of:

• the pwntools python module
• radare2 dissassembler (mostly for static analysis)
• gdb (for dynamic analysis)
• automated ROP-gadget finders

The focus will be:

• to learn about vulnerable C functions
• to learn how simple exploits used to be
• to learn what the GOT is
• to learn what mitigations have been introduced in modern systems
• to learn how to use ROP (return oriented programming) to bypass many exploit mitigations

I will bring some binaries that we can attempt exploit. The goal is for every participant to be able to write a stackpivot->malloc->memcpy->mprotect ropchain to execute shellcode.

Prerequisites

As a participant, you should at least know:

   - C
   - Intel x86_64 assembly
   - the x86_64 calling convention
   Bonus points for knowing the layout of a process in memory and where each section gets loaded into ;D

Participants (please add your name!)

• barbieauglend
• ytvwld
• hanemile
• bison (in blind mode)
• fl0_id
• Plant
• gabriel
• gglyptodon
• Nico

Resolving technical issues

try: $ wget -q -O- https://github.com/hugsy/gef/raw/master/scripts/gef.sh | sh

Resources

   https://github.com/r0hi7/BinExp
   https://null-byte.wonderhowto.com/how-to/exploit-development-learn-binary-exploitation-with-protostar-0181154/
   https://github.com/Bretley/how2exploit_binary
   https://github.com/tharina/BlackHoodie-2018-Workshop
   https://github.com/chiliz16/ROP-Workshop
   https://wiki.osdev.org/Calling_Conventions
   https://github.com/pythonfoo/pythonfooLite/wiki/Python27

   https://md.chaosdorf.de/_hYEB9-aT6-mQbjaXOftzQ?view