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picoCTF Writeup picoGym Practice Challenges GET aHEAD (注意<spoiler>)

CTF
picoCTF

Last updated at 2022-11-17Posted at 2022-11-17

Description

Find the flag being held on this server to get ahead of the competition http://mercury.picoctf.net:21939/

HTMLコードであったりヒントのBurpsuiteを使用してもあまり情報は取れなかった。

タイトルの通りHEADを取得しようと試みたらフラグが返ってきた。

curl -I HEAD -i http://mercury.picoctf.net:53554/

>curl -I HEAD -i http://mercury.picoctf.net:21939/
curl: (6) Could not resolve host: HEAD
HTTP/1.1 200 OK
flag: picoCTF{r3j3ct_th3_du4l1ty_6ef27873}
Content-type: text/html; charset=UTF-8

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