vagd 1.0.8

VirtuAlization GDb integrations in pwntools

VAGD

VirtuAlization GDb integrations in pwntools

Installation

pip install vagd

or from repo with

git clone https://github.com/gfelber/vagd
pip install ./vagd/

Usage

• vagd template [OPTIONS] [BINARY] [IP] [PORT] to generate a template, list OPTIONS with help -h

• vagd info BINARY to print info about binary

# run as process in VM
./exploit.py
# run as gdb server in VM requires tmux
./exploit.py GDB
# run on remote IP:PORT
./exploit.py REMOTE

I recommend using pwndbg.

Files

All created files ares stored in the local ./.vagd/ directory. Additional large files (e.g. cloudimages) are stored in the home directory ~/.vagd/ or handled by tools themselfs (e.g. Vagrant, Docker).

Recommendations

Consider adding these aliases to either ~./.bash_aliases, ~./.bashrc or other

# example use to ssh to guest
# vagdssh
alias vagdssh='VAGRANT_CWD=.vagd vagrant ssh'
# example use to copy flag.txt from host to guest (only works if Port is 2222)
# vagdscp ./flag.txt ./
vagdscp() {
  scp -P 2222 -o StrictHostKeyChecking=no -i ./vagd/.vagrant/machines/default/virtualbox/private_key ${@:3} $1 vagrant@localhost:$2
}
# example use to ssh to guest
# dogdssh
alias dogdssh='ssh -o "StrictHostKeyChecking=no" -i ~/.vagd/keyfile -p $(cut -d":" -f 2 .vagd/docker.lock) vagd@0.0.0.0'
# example use to copy flag.txt from host to guest
# dogdscp ./flag.txt
dogdscp() {
  scp -P $(cut -d":" -f 2 .vagd/docker.lock) -o StrictHostKeyChecking=no -i ~/.vagd/keyfile ${@:3} $1 vagd@localhost:$2
}
# example use to spawn shell in guest 
# dogdexec sh
alias dogdexec='docker exec -it $(cut ./.vagd/docker.lock -d":" -f 1)'
# example use to copy /etc/passwd from guest to host
# dogdcp /etc/passwd ./
dogdcp() {
  docker cp "$(cut ./.vagd/docker.lock -d":" -f 1):$1" $2
}
# example use to ssh to guest
# qegdssh
alias qegdssh='ssh -o "StrictHostKeyChecking=no" -i ~/.vagd/keyfile -p $(cat .vagd/qemu.lock) ubuntu@0.0.0.0'
# example use to copy flag.txt from host to guest
# qegdscp ./flag.txt
qegdscp() {
  scp -P $(cat .vagd/qemu.lock) -o StrictHostKeyChecking=no -i ~/.vagd/keyfile ${@:3} $1 ubuntu@localhost:$2
}

Documentation

Boxes

A listed of known working Boxes can be found in the Documentation. Other images might also work but currently only distributions that use apt and alpine for Docker are supported. This limitation may be circumvented by creating a target yourself (with the dependencies gdbserver, python, openssh) and creating a ssh connection via Shgd.

Future plans

pre configured Vagrant boxes / QEMU Images / Docker Image

created pre configured environments with preinstalled lib debug symbols and gdbserver to lower init runtime.

Better Docker integration

created a Docker integration that allows loading existing Dockerfiles (maybe docker-compose), also add a feature that additionally virtualizes (Vagrant/Qemu) them to change the used kernel.