2021-04-18-the-matrix-umdctf

Posted on April 18, 2021

The Matrix | Web - UMDCTF 2021

Solution

From thif CTF, we have got website’s IP > http://chals5.umdctf.io:4000

Only interesting thing on website was /the-matrix subpage that redirects to /403 where we could see this message

This page is for robots only, you are not allowed to access this content!

This message gave me a hint that with Google Bot User Agent I should be able to see the real content of /the-matrix page

curl -A 'Mozilla/5.0 (compatible; Googlebot/2.1; +http://www.google.com/bot.html)' http://chals5.umdctf.io:4000/the-matrix

Using this command ends up with a flag

Flag

UMDCTF-{r0b0t_r3b3ll!0n}

Credits

License

CC BY 4.0 WaletSec + HuntClauss