Assignment 3

Deadline: Tuesday, January 19, 2021, 11pm (EET, Romania time)

The deadline is hard. No submissions will be accepted past the deadline.

Capture the Flag Format

Assignment 3 uses a CTF (Capture the Flag) format.

Challenges are shown on the CNS CTF Platform, running Mellivora. For each challenge you will have to submit the flag to be able to get the points.

You need to create a team account on the CNS CTF Platform. Please use your full name (as in the class register) for the team name, and make sure you keep the same format (SURNAME Firstname).

Apart from the flag submission, you will create a folder for each challenge. Each challenge folder consists of scripts and a README file documenting your solution to the challenge. Then pack all folders into a .zip archive and submit it on using the Assignment 3: CTF form.

Have fun and happy hacking!


If you are really stuck or think that there is a bug in the assignment feel free to ask the CNS Team at the address You needn't subscribe or anything, just send an e-mail. It's a private discussion.

You may also join the #cns-upb IRC channel on Freenode for live support.

Keep in mind that we won't give solutions but rather hints. We will answer in less than one day and update this page accordingly.

If you need to share the source code with us, please create a private repository on GitHub, Bitbucket or CS GitLab and share it with us:


Do not attack the infrastructure. If you find a problem with one of our tasks, please report to us.

You are not allowed to intercept the traffic of other teams or attack them. Any attempt to cheat on the contest will lead immediately to getting no points for the assignment and a contact of the faculty executive staff.

cns/assignments/assignment-3.txt · Last modified: 2021/01/05 18:44 by adrian.sendroiu
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