info on dir traversal techniques, any?

[Chan Fook Sheng <chanfooksheng () pacific net sg>]

Hi

am doing some security audit for a customer, and i come across a web 
application that accept a GET request with a parameter that I believe is 
a filename on the filesystem of the web server.

I am trying to get the application to display any files on the 
filesystem. I have ried appending %00 etc.. but to no avail.

Anyone knows of more techniques to try?

How can one  determine whether a web application is opening files for 
read, hence making it possible for directory traversal attack?

fs


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