Damjan Cvetko

Damjan Cvetko

Developer, System Architect, Hacker.

Xmasctf2019

Xmas CTF 2019 - Day 23

2 minutes read

<p>Challenge: Since Christmas is getting close, there has been a lot of fake news and Santa is getting some strange messages.</p>

Xmas CTF 2019 - Day 21

8 minutes read

<p>Challenge: Santa trusted 3 elves with his secrets. They couldn’t agree on the encryption scheme to use, so each of them chose a different one. Can you decrypt each of the messages in the attached archive and recover the secret.</p>

Xmas CTF 2019 - Day 24

2 minutes read

<p>Challenge: Santa thanks you all for all the help, dedication and all the challenges you have completed! Thanks again and don’t forget to check BSidesLjbuljana #CFP and sponsorship offers. Now Santa is already running late to some parts of the world but anyway it’s all about perfect timing! Enjoy the last challenge and see you at #BSidesLjubljana!</p>

Xmas CTF 2019 - Day 22

1 minute read

<p>Challenge: Someone send an image to Santa but it got corrupted during the transfer or did it? Maybe someone intentionally did this and hidden a message inside?</p>

Xmas CTF 2019 - Day 17

3 minutes read

<p>Challenge: Every year Santa is using his own Weather App to check if he can deliver presents all around the globe. It’s a very secret and reliable app! Or is it? is it /xams or is it /flag</p>

Xmas CTF 2019 - Day 19

2 minutes read

<p>Challenge: In the last days of preparation to test his flying capabilities, Santa’s elves flew 47 times around the earth and then another 13 times. Then Santa’s elves inserted all good children addresses and suddenly the navigation system crashed with this error message: r~yy!cbb(twz’d"++x(y!a<em>qqt&%u{b</em>)tw%)sv$+$tyssvrr$|zalll Is it some kind of buffer overflow? Do you have any idea how to solve this issue ?</p>

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