where-are-the-robots

Point: 100

Category

Web Exploitation

Question

Can you find the robots? https://2019shell1.picoctf.com/problem/45102/ (link) or http://2019shell1.picoctf.com:45102

Hint

What part of the website could tell you where the creator doesn't want you to look?

Solution

From hints, we'll search some information about robots.txt file. We can read more here. Then we link to url: https://2019shell1.picoctf.com/problem/47235/robots.txt, we will see something like below

User-agent: *
Disallow: /54e98.html

Try to link to url: https://2019shell1.picoctf.com/problem/47235/54e98.html. We've got the flag

If this flag is incorrect, we can try it out with this link to find another flag: https://2019shell1.picoctf.com/problem/47235/54e98.html

Flag

picoCTF{ca1cu1at1ng_Mach1n3s_54e98} or picoCTF{ca1cu1at1ng_Mach1n3s_8e32f}