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Burp Collaborator Server docker container with LetsEncrypt certificate

This repository includes a set of scripts to install a Burp Collaborator Server in a docker environment, using a LetsEncrypt wildcard certificate. The objective is to simplify as much as possible the process of setting up and maintaining the server.

Setup your domain

Delegate a subdomain to your soon to be burp collaborator server IP address. At the minimum you'll need a NS record for the subdomain to be used (e.g. burp.example.com) pointing to your new server's A record:

burp.example.com IN NS burpserver.example.com

burpserver.example.com IN A 1.2.3.4

Check https://portswigger.net/burp/documentation/collaborator/deploying#dns-configuration for further info.

Requirements

  • Internet accessible server
  • bash
  • docker
  • bc
  • openssl
  • Burp Suite Professional

Setup the environment

  • Clone or download the repository to the server (tested on ubuntu 16.04) to a directory of your choice.
  • Put the Burp Suite JAR file in ./burp/pkg/burp.jar (make sure the name is exactly burp.jar, and it is the actual file not a link)
  • Run init.sh with your subdomain and server public IP address as argument:

./init.sh burp.example.com 1.2.3.4

This will start the environment for the subdomain burp.example.com, creating a wildcard certificate as *.burp.example.com.

I'm using an ugly hack on the certbot-dns-cloudflare plugin from certbot, where it just runs a local dnsmasq with the required records, and makes all of this automagically happen.

If everything is OK, burp will start with the following message:

Burp is now running with the letsencrypt certificate for domain *.burp.example.com

You can check by running docker ps, and going to burp, and pointing the collaborator configuration to your new server. Keep it mind that this configuration configures the polling server on port 9443.

The init.sh script will be renamed and disabled, so no accidents may happen.

Certificate renewal

  • There's a renewal script in ./certbot/certificaterenewal.sh. When run, it renews the certificate if it expires in 30 days or less;
  • Optionally, edit the RENEWDAYS variable if you wish to. By default it will renew the certificate every 60 days. If you want to force the renewal to check if everything is working, just set it to 89 days, and run it manually. Remember to set it back to 60 afterwards.;
  • Set your crontab to run this script once a day.

Updating Burp Suite

  • Download it and make sure you put it in ./burp/pkg/burp.jar
  • Restart the container with docker restart burp

Author: Bruno Morisson

Thanks to Fábio Pires (check his burp collaborator w/letsencrypt tutorial) and Herman Duarte (for betatesting and fixes)