Challenge - Man Commands, Server Lost
Elf4711 has written a cool front end for the linux man pages. Soon after publishing he got pwned. In the meantime he found out the reason and improved his code. So now he is sure it’s unpwnable.
Challenge - Santa's Special GIFt
Today, you got a strange GIFt from Santa:
You are unsure what it is for. You do happen to have some wood lying around, but the tool seems to be made for metal. You notice how it has a rather strange size. You could use it for your fingernails, perhaps? If you k...
Challenge - Twelve steps of christmas
On the ninth day of Christmas my true love sent to me...
nineties style xls,
eighties style compression,
seventies style crypto,
and the rest has been said previously.
Hints: Wait, Bread is on the Nice list? B...
Challenge - Wiener waltz
During their yearly season opening party our super-smart elves developed an improved usage of the well known RSA crypto algorithm. Under the “Green IT” initiative they decided to save computing horsepower (or rather reindeer power?) on their side. To achieve this they chos...
Challenge - Chris'mas carol
Since yesterday’s challenge seems to have been a bit on the hard side, we’re adding a small musical innuendo to relax.
My friend Chris from Florida sent me this score. Enjoy! Is this what you call postmodern?
Hints: He also sent this image, but that doesn’t loo...
Challenge - Be patient with the adjacent
Ever wondered how Santa delivers presents, and knows which groups of friends should be provided with the best gifts? It should be as great or as large as possible! Well, here is one way.
Hmm, I cannot seem to read the file either, maybe the internet knows...
Challenge - Santa's Gingerbread Factory
Here you can customize your absolutely fat-free gingerbread man.
Note: Start your personal instance from the RESOURCES section on top.
Goal / Mission: Besides the gingerbread men, there are other goodies there. Let’s see if yo...
Challenge - The game
Let's play another little game this year. Once again, as every year, I promise it is hardly obfuscated.
The file contained an obfuscated Perl script, neatly formatted to look like tetris. Of couse, when ran, it really was...
Challenge - Bad morals
One of the elves recently took a programming 101 course. Trying to be helpful, he implemented a program for Santa to generate all the flags for him for this year's HACKvent 2020. The problem is, he can't remember how to use the program any more and the link to the documentat...