Introduction

Qwilfish is a Python package for fuzzing various Ethernet-related protocols. It is a work in progress and the first goal is grammar-based generation of LLDP frames (IEEE 802.1AB).

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Installation

Prerequisites

• A Linux system
• Python3.8 (higher versions will probably work too, but no guarantees)
• Root privileges (for changing the capabilities of Python binary)

Create a virtual environment

It is recommended to create a virtual environment first:

$ python -m venv venv
$ source venv/bin/activate

Install with pip

To install Qwilfish simply type:

$ pip install qwilfish

Install from source

To install Qwilfish from source type:

$ git clone https://gitlab.com/zluudg/qwilfish.git
$ cd qwilfish
$ pip install .

Qwilfish also supports an editable install:

$ pip install -e .

Setting capabilities

Qwilfish writes packets to raw sockets, which is prohibited for normal users. It is not recommended to install or run Qwilfish as root, however. Instead, change the capabilities of your Python binary:

$ sudo setcap cap_net_raw=eip /path/to/python/binary

Usage

Basic usage

Qwilfish can be invoked without any commands:

$ qwilfish

It will then send one fuzzed LLDP packet on the loopback interface.

To send ten packets on the loopback interface, type:

$ qwilfish -c 10

Set logging level to DEBUG:

$ qwilfish -d

Advanced Configuration

There are some possibilities to configure a Qwilfish session beyond what is offered by the CLI. Please refer to this guide for more info.

Writing Plugins

Certain components in Qwilfish can be replaced in a plugin fashion. For more info check out this guide.

Credit

This project is more than heavily inspired by The Fuzzing Book. Be sure to check it out!