HACKVent 2020 – Day 17

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Challenge – Santa’s Gift Factory Control

Santa has a customized remote control panel for his gift factory at the north pole. Only clients with the following fingerprint seem to be able to connect:


Mission: Connect to Santa’s super-secret control panel and circumvent its access controls.…

HACKVent 2020 – Day 16

Challenge – Naughty Rudolph

Santa loves to keep his personal secrets on a little toy cube he got from a kid called Bread. Turns out that was not a very good idea. Last night Rudolph got hold of it and frubl’d it about five times before spitting it out.…

HACKVent 2020 – Day 15

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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.Notes…

HACKVent 2020 – Day 14

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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.…

HACKVent 2020 – Day 12

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.…

HACKVent 2020 – Day 11

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?…

HACKVent 2020 – Day 10

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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.…

HACKVent 2020 – Day 9

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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 you can get the goodie, which is stored in /flag.txt

HACKVent 2020 – Day 8

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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 a tetris game.…