Re: Canonicalization

Check out the research done by Sourcefire for the Snort project for some
tools and discussion that I think you will find helpful.

http://www.sourcefire.com/products/library.html#wp

- No registration required:
http://docs.idsresearch.org/http_ids_evasions.pdf

and HTTP Chameleon

http://code.idsresearch.org/SetupHttpChameleon.zip

or for *nix systems

http://code.idsresearch.org/encoder.c



susam_pal@yahoo.co.in wrote:
> I am writing some examples. Please tell me if these are the examples of 
> Canonicalization.
>
> 1. When an web application gets parameters from a GET request or POST 
> request, and if that parameter is going to be used as a part of an SQL query, 
> then the programmer must take care to convert the single-quote (') to two 
> single-quotes('') for Oracle Database in order to prevent SQL injection. Is 
> this canonicalization?
>
> 2. Take a guestbook of a site. The feedback given is going to appear back in 
> the web-page. Here we need to take care that things like "<font>" should be 
> converted to "&gt;font&lt;" before it appears on the page. Is this a case of 
> canonicalization?
>
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This List Sponsored by: SPI Dynamics

ALERT: "How A Hacker Launches A Web Application Attack!" 
Step-by-Step - SPI Dynamics White Paper
Learn how to defend against Web Application Attacks with real-world 
examples of recent hacking methods such as: SQL Injection, Cross Site 
Scripting and Parameter Manipulation

https://download.spidynamics.com/1/ad/web.asp?Campaign_ID=701300000003gRl
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