ProxyFuzz – MITM Network Fuzzer in Python

Use Netsparker


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:


DeepSound - Audio Steganography Tool DeepSound – Audio Steganography Tool
DeepSound is an audio steganography tool and audio converter that hides secret data into audio files, the application also enables you to extract from files.
2019 High Severity Vulnerabilities What are the MOST Critical Web Vulnerabilities in 2019?
So what is wild on the web this year? Need to know about the most critical web vulnerabilities in 2019 to protect your organization?
GoBuster - Directory/File & DNS Busting Tool in Go GoBuster – Directory/File & DNS Busting Tool in Go
GoBuster is a tool used to brute-force URIs (directories and files) in web sites and DNS subdomains (inc. wildcards) - a directory/file & DNS busting tool.
BDFProxy - Patch Binaries via MITM - BackdoorFactory + mitmProxy BDFProxy – Patch Binaries via MiTM – BackdoorFactory + mitmproxy
BDFProxy allows you to patch binaries via MiTM with The Backdoor Factory combined with mitmproxy enabling on the fly patching of binary downloads
Domained - Multi Tool Subdomain Enumeration Domained – Multi Tool Subdomain Enumeration
Domained is a multi tool subdomain enumeration tool that uses several subdomain enumeration tools and wordlists to create a unique list of subdomains.
Acunetix Vulnerability Scanner For Linux Now Available Acunetix Vulnerability Scanner For Linux Now Available
Acunetix Vulnerability Scanner For Linux is now available, now you get all of the functionality of Acunetix, with all of the dependability of Linux.


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.