OverTheWire Natas Level 3 Walkthrough

Today we're doing level 3 of the Natas series of CTF wargames hosted at:

http://natas3.natas.labs.overthewire.org/

As usual, we will supply the current Natas level as the username (natas3) and the password we got from the previous level as the password.  The actual webpage looks like this:


We then take a look at the source for this webpage:


This comment is a reference to search engine crawling, search engines find all the pages on your website by mapping them out with special programs.  A website can deliberately omit certain pages from being mapped by search engine crawlers by including a special file on their website called robots.txt, which lists all the webpages that the webpage creators don't want mapped.

Let's check out the robots.txt file on the Natas3 page.

http://natas3.natas.labs.overthewire.org/robots.txt


That's a secret directory right there, so let's check it out.

http://natas3.natas.labs.overthewire.org/s3cr3t


A hidden text file.  Let's take a look.

http://natas3.natas.labs.overthewire.org/s3cr3t/users.txt


Summary

Natas3 indicated that there is a disallowed entry in the robots.txt file on the website.  Inspecting robots.txt on the site revealed a secret directory, which contained a text file containing the password for Natas4.

Finish












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