| 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