easy kernel

I used the proprietary michaelsec tool to protect my secret data. Can you recover it?

https://instancer.chal.irisc.tf/challenge/o-wronly

o-wronly.tar.gz

By: lambda

medium jail

You have entered the Cobra's Den, can you find a way to escape?

nc cobras-den.chal.irisc.tf 10400

cobras-den.tar.gz

By: seal

medium

Please see the provided documents for more information on the subject. Use all lowercase letters for the flag.

files

By: nope

hard jail

from os import system as win

This challenge is heavily inspired by the challenge "Diligent Auditor" by aplet123 from DiceCTF 2024.

nc warden.chal.irisc.tf 10401

warden.tar.gz

By: sera

hard microarchitecture

My new simulated flagchecker service is free from any pesky channels outside of intended communication.

nc prime5.chal.irisc.tf 10402

prime5.tar.gz

Hint!

The challenge flushes any touched memory after performing the flag check and runs in constant time. What's the difference between that and the challenge not going through the cache at all?

Hint!

The intended solution does not exploit any specifics of gem5.

By: sera