BASH Level 2
Table of Contents
As long as you are fast enough…
Problem
#!/bin/bash
x=$RANDOM
base64 flag.txt > /tmp/$x
function finish {
rm /tmp/$x
}
trap finish EXIT
sleep 15
Solution
Terminal #1
level2@5a2276bbe718:~$ sudo -u level3 ./random_dirs.sh
Terminal #2
level2@5a2276bbe718:/tmp$ ls
12422 adri asd.sh flag.txt hax.sh lol.sh make.txt o0.sh rTest ssh-TL46fB2WXR test.sh whoops.txt woops.txt
level2@5a2276bbe718:/tmp$ cat 12422
YXVjdGZ7ZzB0dEBfbXV2X2Zhczd9Cg==
Then got the flag auctf{g0tt@_muv_fas7}
