With the Christmas period pretty much over and done with. I can now really get my teeth sunk in and try my hand at the bandit level 17. If you haven’t had a chance to read my OverTheWire Bandit Write Up – Level 16 write up, give it a quick read then head back over here.

Level template

The password is contained in a file named `passwords.new`. However there are many passwords also included in that file. I need to compare the file with a second provided file name passwords.old to find what has changed.

Let’s Start Hacking Then

As like any of the previous levels I need to spin up a fresh terminal and initiate a SSH connection to the machine.

ssh bandit17@bandit.labs.overthewire.org -p 2220

I am then prompted for the password I acquired from the previous level. It works, and I’m in.

Using the ls command I have a look in the bandit level 17 home directory to see what files I have to play with. As to be expected I have a passwords.old file and a passwords.new file. I can start by having s look in the files to see if it is obvious what the password may be, I do this with the following commands;

cat passwords.old
cat passwords.new

However, there doesn’t seem to be an easy way to tell what the password may be. I have a look round the man pages and found that the diff command would probably work. So I execute the following command. After that it outputs the only line that doesn’t appear in both.

diff passwords.old passwords.new

…and Wham! Bam! Thank you ma’am! I have the password now for level 18.

Level 17 Complete

I have hidden the password here, if you are playing along don’t peek! Please! It’s more fun getting it yourself.

Categories: Hacking

Justin Byrne

Justin Byrne is a self motivated tech enthusiasts. Spending more than half his life dedicated to the tech industry. He built his first computer at the age of 11, and has been building ever since. His interests have changed across the years from system building to web programming and even a dab of software engineering, and just like his interests, his operating system has changed sometimes more then 4 times a year.


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