ProxyFuzz – MITM Network Fuzzer in Python

Keep on Guard!


ProxyFuzz is a man-in-the-middle non-deterministic network fuzzer written in Python. ProxyFuzz randomly changes (fuzzes) contents on the network traffic. It supports TCP and UDP protocols and can also be configured to fuzz only one side of the communication. ProxyFuzz is protocol agnostic so it can randomly fuzz any network communication.

ProxyFuzz is a good tool for quickly testing network protocols and provide with basic proof of concepts. Using this tool you will be amazed by the poor quality of software and you will see clients and servers dying upon unexpected input, just be prepared to see the very weird behaviours.

Syntax of ProxyFuzz:

A demo of ProxyFuzz is available here.

The video shows ProxyFuzz proxying traffic between a VMWare Console and a VMWare Server. This is just a dumb example of the things you can do with this tool.

Download ProxyFuzz 0.1 Source Code

Download ProxyFuzz 0.1 Windows Binary

Or read more here.

Posted in: Hacking Tools, Networking Hacking

, , , , , ,


Latest Posts:


OWASP ZSC - Obfuscated Code Generator Tool OWASP ZSC – Obfuscated Code Generator Tool
OWASP ZSC is an open source obfuscated code generator tool in Python which lets you generate customized shellcodes and convert scripts to an obfuscated script.
A Look Back At 2017 – Tools & News Highlights A Look Back At 2017 – Tools & News Highlights
So here we are in 2018, taking a look back at 2017, quite a year it was. Here is a quick rundown of some of the best hacking/security tools released in 2017, the biggest news stories and the 10 most viewed posts on Darknet as a bonus.
Spectre & Meltdown Checker - Vulnerability Mitigation Tool For Linux Spectre & Meltdown Checker – Vulnerability Mitigation Tool For Linux
Spectre & Meltdown Checker is a simple shell script to tell if your Linux installation is vulnerable against the 3 "speculative execution" CVEs that were made public early 2018.
Hijacker - Reaver For Android Wifi Hacker App Hijacker – Reaver For Android Wifi Hacker App
Hijacker is a native GUI which provides Reaver for Android along with Aircrack-ng, Airodump-ng and MDK3 making it a powerful Wifi hacker app.
Sublist3r - Fast Python Subdomain Enumeration Tool Sublist3r – Fast Python Subdomain Enumeration Tool
Sublist3r is a Python-based tool designed to enumerate subdomains of websites using OSINT. It helps penetration testers and bug hunters collect and gather subdomains for the domain they are targeting.
coWPAtty Download - Audit Pre-shared WPA Keys coWPAtty Download – Audit Pre-shared WPA Keys
coWPAtty is a C-based tool for running a brute-force dictionary attack against WPA-PSK and audit pre-shared WPA keys.


3 Responses to ProxyFuzz – MITM Network Fuzzer in Python

  1. dre June 27, 2007 at 10:39 pm #

    interesting. proxy fuzzing is a heuristic-based dissection technique used to automate or improve the performance of fuzz testing. it is not widely known or talked about, but is probably one of the best ways to improve fuzz testing results, especially in a pure black-box scenario (iow: lacking the capability to go gray box via reverse engineering through static binary or bytecode analysis).

    when i first saw this post, i was thinking that proxyfuzzer, a tool by cody pierce of dvlabs (tippingpoint) was released. this tool goes further than ProxyFuzz because it does automatic mutation of plain-text fields. the internal tippingpoint version probably also does binary data, thus being able to change TLV and static values which could mess with parsers on either end of the connection.

    proxy fuzzer (and tons of other new tools) will be available on the fuzzing.org website once it goes live. there were a few things up there the other day, but now it’s password protected for some reason.

  2. Darknet June 29, 2007 at 8:26 am #

    Interesting info dre, I’ll keep an eye on fuzzing.org. http://theartoffuzzing.com/ is currently a good resource too.

  3. Daniel June 30, 2007 at 12:23 am #

    Darknet, i think you should make dre’s comment into a post. It was interesting.