Points: 150

General Skills

Sometimes you have to configure environment variables before executing a program. Can you find the flag we've hidden in an environment variable on the shell server?

unix env

We can use the printenv command to show all the environment variables running in the system. Pipe output to grep and get the flag.

# Execute this command in the web shell
$ printenv | grep picoCTF
SECRET_FLAG=picoCTF{eNv1r0nM3nT_v4r14Bl3_fL4g_3758492}

picoCTF{eNv1r0nM3nT_v4r14Bl3_fL4g_3758492}