ImaginaryCTF 2021


CTF Archive

Welcome to ImaginaryCTF 2021

ImaginaryCTF 2021 is an all new CTF competition, with all skill levels welcome to participate. It runs from July 23 to July 27, starting and ending at 4 PM UTC. In the competition, teams of up to six players will be challenged to hack websites and servers, crack codes, and recover information through challenges in cryptography, binary exploitation, web exploitation, forensics, reversing, and more. We hope you will have fun and learn something new!

Original Date: Fri, 23 July 2021, 16:00 UTC — Tue, 27 July 2021, 16:00 UTC
Original URL: https://2021.imaginaryctf.org/
CTFtime Entry: ImaginaryCTF 2021
Organizing Team: ImaginaryCTF


Challenges

im scared of format strings

Use flagCheck to input the flag you get from the challenge to get the actual flag

Author: ImaginaryCTF

Seems that random.org limits how much entropy you can use per day. So why not reuse entropy?

Use flagCheck to input the flag you get from the challenge to get the actual flag

Author: ImaginaryCTF

People keep volunteering to be tributes. I really think they should stop doing that, I've seen the management system get messed up by this.

Use flagCheck to input the flag you get from the challenge to get the actual flag

Author: ImaginaryCTF

I've made a challenge that's not pwn! Just because it looks like a bird and sings like a bird doesn't mean it's pwn. And good thing it's not pwn, because this binary has full protections (including a canary!).

Use flagCheck to input the flag you get from the challenge to get the actual flag

Author: ImaginaryCTF

There's a beautiful solution for No Thoughts, Head Empty, to make the code just print the flag. However, there's a much easier, but much less elegant solution, that I imagine many people found instead. The elegant solution is still there - can you find it in this empty head?

Use flagCheck to input the flag you get from the challenge to get the actual flag

Author: ImaginaryCTF

Welcome to the woods. Consider yourself lost with only one way out. It's dangerous out here, take this binary

Use flagCheck to input the flag you get from the challenge to get the actual flag

Author: ImaginaryCTF


30-Day Scoreboard:

This scoreboard reflects solves for challenges in this module after the module launched in this dojo.

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