Practitioner Lab 2: File path traversal, traversal sequences stripped non-recursively

 This lab contains a path traversal vulnerability in the display of product images.

The application strips path traversal sequences from the user-supplied filename before using it.

To solve the lab, retrieve the contents of the /etc/passwd file.



The first thing I do is look at the website and how it is working

I see a lot of images so I can use Burp Suite to look at where are all these images coming from



Here I can see the request for all these images

I will try to change it for another file name to see if I can get it

I know it is stripped so I will probably have to use // of them to get it to work.



When I try to use the absolute path it doesn’t work because it it stripped.

Now I will use the double to see how it works



It took me a while but I figured out how it worked. This way it works when it is filtered.



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