Hawk is the infrastructure the Netsparker web application security scanner uses to detect Server Side Request Forgery (SSRF), and all other kinds of blind, asynchronous and second order vulnerabilities that require data to be sent over out-of-band channels.
This topic explains how to host Hawk infrastructure in your environment.
For further information, see How Hawk Finds Vulnerabilities.
These are the minimum requirements for the machines on which you install Hawk:
- Docker must be installed
- SSL/TLS certificate ready in .pem format for <DOMAIN_NAME>
- Recommended RAM: 4 GB
- Recommended disk: 100 GB (mostly for logging purposes)
How to Install Hawk Internally
- Make sure you have a Static IP address to allocate to the DNS Server, which will be referred to as
<STATIC_IP>in these steps.
- Register a short DNS Address, which will be referred to as
example.comin this document.
ns2.<DOMAIN_NAME>as Name Servers for
<STATIC_IP>. The Name Server will be hosted inside the Docker Container.
- Please make sure that the following Hawk ports are reachable and not used by any other process:
- TCP 80, 53, 443; from everywhere
- UDP 53; from everywhere
- Download the latest compressed Hawk Docker image file and copy it to a machine with a Docker installation. You can download it from this link: https://s3.amazonaws.com/ns.hawk/netsparkerhawk.tar.xz
- Load this image to Docker using the following command:
docker load < netsparkerhawk.tar.xz
- Create a container using the following command. Adjust the command, by inserting your own domain name (<DOMAIN NAME> and static IP (<STATIC IP>).
docker create -it -e DOMAIN_NAME='<DOMAIN_NAME>' -e STATIC_IP='<STATIC_IP>' -e RESPONDER_HTTP_ONLY='NO' --security-opt=no-new-privileges --restart=always --oom-kill-disable --memory=3g -p 80:80 -p 443:443 -p 53:53/udp --name netsparkerhawk netsparkerhawk
- We recommend that you have SSL/TLS support between Netsparker and Hawk. If your certificates are in .crt and .key file formats, they should be converted to .pem files (see https://stackoverflow.com/search?q=crt+key+pem).
- Copy your certificate and private key into the cert folder in the Hawk container
docker cp fullchain.pem netsparkerhawk:/opt/cert/fullchain.pem
docker cp privkey.pem netsparkerhawk:/opt/cert/privkey.pem
- If you do not wish to use HTTPS, e.g. for testing purposes, pass the
RESPONDER_HTTP_ONLY='YES'argument to the
- Start the container:
docker start netsparkerhawk
- Configure DNS for
<DOMAIN_NAME>, as in
- Define two name servers
ns2.example.comto point to the static IP address of the docker host
- Check that the docker host machine is accessible using these DNS names
- Hawk should be able to resolve the following addresses:
- Define two name servers
- Change Hawk URI in the policy to https://example.com or http://example.com if you do not want to use HTTPS.
- Validate DNS Settings and Netsparker Hawk.
- You can now run Netsparker scans using a custom server that uses this policy for Hawk verification.