Harald van der Laan hvanderlaan

From security scan to rooting a box

A friend of my created a php website / application, and ask me to check the website / application. so if started som simple test to if i could find some nice vulnerablity's. But what i found shocked me.

The information i've got

To annonimize this the fqdn is changed to domain.tld

information gathering: website directories

Docker swarm cluster on raspberry pi's

The goal is to create a very cheap docker cluster for the home environment, but still is capable of running multiple docker services. The idea is to use raspberry pi 3 B+ units. These small computers have a 1,4 GHz quadcore ARM cortex A53 soc and 1GB of memory. This should be sufficient to run pi-hole, home-assistant and wordpress websites.

Requirements

2 or more raspberry pi 2/3 B/B+
2 or more 2.5A micro-usb powersupplies
2 or more 8GB or bigger mirco sdhc cards
HypriotOS image
Etcher sdcard flasher
(optional): 5 or more ports 100/1000Gbit switch

Ansible vault example

New in Ansible 1.5, “Vault” is a feature of ansible that allows keeping sensitive data such as passwords or keys in encrypted files, rather than as plaintext in your playbooks or roles. These vault files can then be distributed or placed in source control. To enable this feature, a command line tool, ansible-vault is used to edit files, and a command line flag –ask-vault-pass or –vault-password-file is used. Alternately, you may specify the location of a password file or command Ansible to always prompt for the password in your ansible.cfg file. These options require no command line flag usage.

Requirements

ansible > 1.5
openssl
inventory file
host_vars or group_vars
ansible directory best practices structure

Poor man's Ansible Tower

After a while of messing around with the free / demo version of Ansible Tower I thought that this could also be done with free tools. With some help from the internet and as an IT consultant I found the way forward.

As we all known Ansible is for free and is a package in the Ubuntu repository. Ansible Tower is a frontend for Ansible that will provide scheduler and a fancy webfrontend.

Rundeck is a job scheduler and runbook administration that is for free and also has a fancy webfrontend.

So for the poor man's solution we are going to use the best of both worlds.

POC

user@host ~ $ lxc launch ubutnu wp-server
user@host ~ $ lxc exec wp-server -- bash
root@wp-server ~ # apt-get update
root@wp-server ~ # apt-get --yes dist-upgrade
root@wp-server ~ # apt-get --yes install wget apache2 libapache2-mod-php7.0 mysql-server php7.0-mysql

root@wp-server ~ # msyql -u root -p

	#cloud-config
	# vim: syntax=yaml
	#

	# The current version of cloud-init in the Hypriot rpi-64 is 0.7.9
	# When dealing with cloud-init, it is SUPER important to know the version
	# I have wasted many hours creating servers to find out the module I was trying to use wasn't in the cloud-init version I had
	# Documentation: http://cloudinit.readthedocs.io/en/0.7.9/index.html

	# Set your hostname here, the manage_etc_hosts will update the hosts file entries as well

	#!/usr/bin/env python

	"""
	dynamic-inv-local-network.py - dynamic ansible inventory file for use a local network

	usage: ansible --ask-vault-password -i dynamic-inv-local-network.py all -m ping
	"""

	from __future__ import (print_function, absolute_import, division, unicode_literals)

	#!/usr/bin/env python

	# file : nagiosTelegram.py
	# purpose : send nagion notifications via Telegram bot
	#
	# author : harald van der laan
	# date : 2017/04/01
	# version : v1.0.1
	#
	# changelog:

	#!/bin/bash

	# file : create-lxc-alpine-ansible-node.sh
	# purpose: deploy a new alpine container that is the ansible server
	#
	# author : harald van der laan
	# date : 2016/04/19
	# version: v1.0

	lxcName="ansible01"

	[tardfri]
	hubip = x.x.x.x
	securityid = AABBCCDDEEFFGGHH