untidy – XML Fuzzer

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Seen as though untidy was mentioned again fairly recent, it sparked my memory that I have a fairly old draft regarding untidy the XML Fuzzer.

Fuzzing is definitely becoming an important part of Pen Testing and especially application security – we’ve published about quite a few and I’m sure there are more in development.

Anyway, back to topic.

I’m glad to release the second beta version of untidy; untidy is general purpose XML Fuzzer. It takes a string representation of a XML as input and generates a set of modified, potentially invalid, XMLs based on the input. It’s released under GPL v2 and written in python.

It’s currently in it’s second release (Beta 2).

There are no prerequisites for running untidy, you will have to change it slightly though as it will output a LOT of XML to the screen, you’ll need to find the “print i” and change it to something more appropriate (sending to the server you want to test or outputing to a file with a newline for each iteration).

You can download untidy here:


Or read more here.

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2 Responses to untidy – XML Fuzzer

  1. dirty November 8, 2007 at 4:10 pm #

    “as it will output a LOT of XML to the screen”
    Wow, you werent kidding! jk LOL
    Neat tool though

  2. Reticent November 12, 2007 at 10:22 pm #

    Just a FYI for those that arent so familar with the term, ‘fuzzing’ – http://en.wikipedia.org/wiki/Fuzz_testing – Seems to be a bit of a buzz word at the moment.