Binary Exploitation Workshop: Difference between revisions

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|Description=== AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA == Segmentation fault (core dumped)
|Description=== AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA == Segmentation fault (core dumped)
|Type=Meet-Up
|Type=Meet-Up
|Date=2019-08-05
|Start=13:00
|isRelevant=Yes
|isRelevant=Yes
}}
}}
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The focus will be:
The focus will be:
* learning about vulnerable C functions
* to learn about vulnerable C functions
* learning how simple exploits used to be
* to learn how simple exploits used to be
* learning what the GOT is
* to learn what the GOT is
* learn what mitigations have been introduced in modern systems
* to learn what mitigations have been introduced in modern systems
* using ROP (return oriented programming) to bypass many exploit mitigations
* to learn how to use ROP (return oriented programming) to bypass many exploit mitigations


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


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* gglyptodon
* gglyptodon
* Nico
* Nico
== Resolving technical issues ==
try:
$ wget -q -O- https://github.com/hugsy/gef/raw/master/scripts/gef.sh | sh


== Resources ==
== Resources ==
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     https://github.com/tharina/BlackHoodie-2018-Workshop
     https://github.com/tharina/BlackHoodie-2018-Workshop
     https://github.com/chiliz16/ROP-Workshop
     https://github.com/chiliz16/ROP-Workshop
    https://wiki.osdev.org/Calling_Conventions
    https://github.com/pythonfoo/pythonfooLite/wiki/Python27
    https://md.darknebu.la/_hYEB9-aT6-mQbjaXOftzQ?both

Revision as of 13:42, 5 August 2019

Binary Exploitation Workshop
== AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA == Segmentation fault (core dumped)
Art Meet-Up
Relevant? Yes
Binary Exploitation Workshop alpha
Pushfur.jpg
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!)

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.darknebu.la/_hYEB9-aT6-mQbjaXOftzQ?both