Hello there, I am Simon, a 24 year-old cybersecurity student at Saarland University. I have started my masters and wrote my bachelor thesis on side-channel attacks. Parts of my freetime are dedicated to playing Capture-The-Flag competitions (usually with my local team saarsec). Thus, I will be looking forward to showing some cool challenge solutions in the WriteUps section. Apart from that, I am a Kubernetes enjoyer and have my own homelab running a little k3s cluster.
A writeup on the misc/bctf-infra challenge from b01lersctf. My solution races shutil.copytree, which first copies files and only applies file permissions afterwards — all triggered from within a Pyjail.