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]