writeups

RC3 CTF 2017 - Write-ups

noraj (Alexandre ZANNI)
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🇬🇧

Information#

Version#

By Version Comment
noraj 1.0 Creation

CTF#

  • Name : RC3 CTF 2017
  • Website : rc3ctf.rc3.club
  • Type : Online
  • Format : Jeopardy
  • CTF Time : link

100 - This is where I'd put my Home Page.. IF I HAD ONE - Web#

This page won't seem to load.. what is happening???????? - Joker 13.59.6.98:80

Note: Flag is not in RC3-2017{} format

This seems like a loop of pages redirecting one to the next.

$ curl http://13.59.6.98/
<meta http-equiv="refresh" content="0; url=C.html" /> <p hidden>R</p>

So I made a short ruby script to collect the hidden elements.

require 'net/http'

page = ''
hidden_string = []

loop do
  uri = URI('http://13.59.6.98/' + page)
  html = Net::HTTP.get(uri)
  page, hidden = html.match(/<meta http-equiv="refresh" content="0; url=([a-zA-Z0-9]+\.html)" \/> <p hidden>(.*)<\/p>/).captures
  break if page == 'C.html' && !hidden_string.empty?
  hidden_string.push(hidden)
end

puts hidden_string.join

By running my script I got the flag: RC3W3MUS7G0D33P3RR3D1R3C777.

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