[TOOL] TCP/UDP Protocol Fuzzer (CIRT.DK)

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TCP/UDP Protocol Fuzzer (CIRT.DK)
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SUMMARY



DETAILS

"Fuzzing" is an automated software testing technique that generates and
submits random or sequential data to various areas of an application in an
attempt to uncover security vulnerabilities.

For example, when searching for buffer overflows, a tester can simply
generate data of various sizes and send it to one of the application entry
points to observe how the application handles it.

Usage example (string overflow):
fuzz.pl -host 192.168.1.2 -port 80 -type string -load template.txt

Making the template:

Make a file where you can put any request into, and the place you want to
Fuzz insert the tag <FUZZER>, if you need to count size of data you eg.
like in a POST request of a HTTP server, use the tags <COUNT>data<COUNT>
and <SIZE>, it could be done as follows:

POST /cgi-sys/FormMail.cgi HTTP/1.1
Host: 127.0.0.1
User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.7.5)
Gecko/20041128 Firefox/1.0 (Debian package 1.0-4)
Keep-Alive: 300
Connection: keep-alive
Referer: http://127.0.0.1/
Content-Type: application/x-www-form-urlencoded
Content-Length: <SIZE>

<COUNT>recipient=test%40127.0.0.1&subject=Fuzzing&Name=test
&email=test%40localhost& request=test<FUZZER>&redirect=/<COUNT>

You can also use hex values like \x41 or 0x41 values in the template if
the protocol is binary.


ADDITIONAL INFORMATION

The information has been provided by <mailto:tools@xxxxxxx> CIRT Tools.
To keep updated with the tool visit the project's homepage at:
<http://www.cirt.dk/tools/fuzzer/fuzzer.txt>
http://www.cirt.dk/tools/fuzzer/fuzzer.txt



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