Sdctf 2021

No flag for you

Solved By : Taz

• We found out that ls, cat, echo commands were available.
• So started looking around for these.
• Found a way to list dir using echo:

echo /*

• started looking around for the flag and found it in the /home/user/run/opt dir

echo /home/user/run/opt/*

• Did some research on ways to read a file using echo, and got something.
• Reference link: https://stackoverflow.com/questions/22377792/how-to-use-echo-command-to-print-out-content-of-a-text-file

echo "$(</home/user/run/opt/flag-b01d7291b94feefa35e6.txt)"