File path traversal, traversal sequences stripped non-recursively


This lab contains a file path traversal vulnerability in the display of product images. The application strips path traversal sequences from the user-supplied filename before using it.

Reproduction and proof of concept

  1. Use Burp Suite to intercept and modify a request that fetches a product image.

  2. Modify the filename parameter, giving it the value: ....//....//....//etc/passwd

  3. The response contains the contents of the /etc/passwd file:



An attacker will need to retrieve the contents of the /etc/passwd file.