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Re: Bruteforcing HTML and browser-sec to find BoF's

From: Nick FitzGerald <nick () virus-l demon co uk>
Date: Sat, 13 Dec 2008 10:02:29 +1300

Malformed Guy wrote:

There have been a lot of recent IE exploits and talk of "browser-sec"
floating around recently and I thought "Hey, what if you made a script
that actually bruteforced html?" For example a script that spews out
possible combinations of HTML/ASP/JAVASCRIPT/JAVA/SQL/PHP: 

<html><h\ntml><ht\nml>

<<snip>>

Idea was inspired by the Samy worm:
http://namb.la/popular/tech.html
"To get around this, some browsers will actually interpret "java\nscript" as "javascript" (that's 
java<NEWLINE>script)."


You're new to this whole scene, right?

You don't think that malware authors often, usually or any other way 
reliably come up with most of the ideas in their code do you?

P.S. Someone tell me this is an awesome idea, else I'll cry like a little girl.


It _is_ a fairly awesome idea.

But you'd better start crying anyway bitch as you've just reinvented a 
(rather limited form of) HTML fuzzing.

In various forms, fuzz testing has been around for about 20 years, so I 
guess it's understandable you'd have missed discovering that this 
approach has already been discovered...

See what Wikipedia has to say about it:

   http://en.wikipedia.org/wiki/Fuzz_testing

and soak up the history from the original (??) fuzz site:

   http://en.wikipedia.org/wiki/Fuzz_testing


Regards,

Nick FitzGerald


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Current thread:

Bruteforcing HTML and browser-sec to find BoF's Malformed Guy (Dec 12)
- Re: Bruteforcing HTML and browser-sec to find BoF's Nick FitzGerald (Dec 12)