environ

environ

Points: 150

Category

General Skills

Question

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?

Hint

unix env

Solution

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}

Flag

picoCTF{eNv1r0nM3nT_v4r14Bl3_fL4g_3758492}