In this challenge, we can see that there’s no code for us to exploit, it’s something in the system. I log in to the system, and look in the /home/flag03 folder, as all the other challenges have started. I see there’s a writable.sh script, which I was guessing was the script …

Recently, I’ve been getting more and more back into computer security, one of my favorite topics. Part of this is research, and part is more practical, such as wargames or labs. One newer wargame that I’ve been playing is called “Nebula”, from the guys over at …