Tutorial for Fuzzled – Writing a Fuzzer with the Fuzzled Framework

Outsmart Malicious Hackers


If you remember we mentioned Fuzzled a little while back, the PERL fuzzing framework. Apparently Fuzzled 1.1 should be coming out soon.

Fuzzled is a powerful fuzzing framework. Fuzzled includes helper functions, namespaces, factories which allow a wide variety of fuzzing tools to be developed. Fuzzled comes with several example protocols and drivers for them.

Someone was kind enough to write a short paper on how to use fuzzled to write a simple fuzzer. The paper includes some techniques used to dismantle protocols including documentation, observation and static analysis.

To quote the author:

The paper includes some of the techniques I use to dismantle protocols including documentation, observation and static analysis. It then moves on to the fundamentals of implementing a protocol using the framework. I talk about base requests, namespaces and tieing them together with factories with reference to Fuzzled::Protocol::HTTP, an example included in the framework. The paper also highlights a few tricks to the framework, including developing multi-threaded fuzzers, identifying offsets and parsing packets. It ends with my techniques to identify vulnerabilities highlighted by fuzzers.

You can download the paper here:

WAFUTFF [PDF]

Posted in: Hacking Tools, Secure Coding

, , , , ,


Latest Posts:


snallygaster - Scan For Secret Files On HTTP Servers snallygaster – Scan For Secret Files On HTTP Servers
snallygaster is a Python-based tool that can help you to scan for secret files on HTTP servers, files that are accessible that shouldn't be public and can pose a s
Portspoof - Spoof All Ports Open & Emulate Valid Services Portspoof – Spoof All Ports Open & Emulate Valid Services
The primary goal of the Portspoof program is to enhance your system security through a set of new camouflage techniques which spoof all ports open and also emulate valid services on every port.
Cambridge Analytica Facebook Data Scandal Cambridge Analytica Facebook Data Scandal
One of the biggest stories of the year so far has been the scandal surrounding Cambridge Analytica that came out after a Channel 4 expose that demonstrated the depths they are willing to go to profile voters, manipulate elections and much more.
GetAltName - Discover Sub-Domains From SSL Certificates GetAltName – Discover Sub-Domains From SSL Certificates
GetAltName it's a little script to discover sub-domains that can extract Subject Alt Names for SSL Certificates directly from HTTPS websites which can provide you with DNS names or virtual servers.
Memcrashed - Memcached DDoS Exploit Tool Memcrashed – Memcached DDoS Exploit Tool
Memcrashed is a Memcached DDoS exploit tool written in Python that allows you to send forged UDP packets to a list of Memcached servers obtained from Shodan.
QualysGuard - Vulnerability Management Tool QualysGuard – Vulnerability Management Tool
QualysGuard is a web-based vulnerability management tool provided by Qualys, Inc, which was the first company to deliver vulnerability management services as a SaaS-based web-service.


4 Responses to Tutorial for Fuzzled – Writing a Fuzzer with the Fuzzled Framework

  1. dirty November 6, 2007 at 6:14 pm #

    does anyone know when fuzzled 1.1 is coming out

  2. Darknet November 7, 2007 at 6:19 am #

    dirty: They are just polishing it off right now, you can request a pre-release if you are interested from the author. If not it should be fairly soon (within November I’d guess).

  3. dirty November 7, 2007 at 9:01 pm #

    darknet
    Thanks!! sounds good

  4. Tim Brown November 15, 2007 at 12:53 am #

    Fuzzled 1.1 is now out at http://www.nth-dimension.org.uk/downloads.php?id=15. I’m actually already working on the 2.x branch. Whilst 1.x fuzzers will still work under 2.x, my current focus has been abstracting the producer/consumer model and shared memory management used by Fuzzled. The upshot is that the protocol modules themselves are much, much cleaner.