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CSICTF - By Computer Society of VIT is one of the finest CTFs hosted by India.
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CSICTF-Writeups/Web/Oreo
rishitsaiya 1aed7e56bf
Added Web Challenges 		4 years ago
..
README.md Added Web Challenges 4 years ago
Web1.png Added Web Challenges 4 years ago
base64_decode.png Added Web Challenges 4 years ago
base64_encode.png Added Web Challenges 4 years ago

README.md

Oreo

The main idea finding the flag is just tweaking the cookies.

Step-1:

After I visited the URL: http://chall.csivit.com:30243/, this web page was shown:

Step-2:

I tried inspecting the element, but it wasn't helpful. So I checked the cookie and got a cookie flavour with value c3RyYXdiZXJyeQ%3D%3D.

Step-3:

It was simple Base64 and I decoded it to get strawberry.

Step-4:

So I got to change the flavor to chocolate as in description. So I encoded chocolate accordingly, to get:

Step-5:

I loaded that base64 encoding Y2hvY29sYXRl as a cookie and refreshed the page to get the flag.

Step-6:

Finally the flag becomes: csictf{1ick_twi5t_dunk}