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[pwncollege] Path Traversal 1 write-up
Exploiting Path Traversal Vulnerabilities: A Step-by-Step Guide Exploiting Path Traversal Vulnerabilities: A Step-by-Step Guide Introduction Path traversal is a common web vulnerability that allows attackers to access files outside the intended directory. In this guide, we'll explore how to exploit and prevent this vulnerability using a real-world example. The Challenge The challenge involves a Flask-based web server that serves files from the /challenge/files directory. The server is vulnerable to path traversal due to improper handling of user input in the URL path. Server Code #!/opt/pwn.college/python import flask import os app = flask.Flask(__name__) @app.route("/files", methods=["GET"]) @app.route("/files/ ", methods=["GET"]) def challenge(path="index.html"): requested_path = app.root_path + "/files/" + path ...
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