Hack.lu CTF 2016 : redacted-200

Category: Crypto Points: 200 (-23) Solves: 80 Description:

Someone gave a nice presentation with some redacted ssh keys, I extracted them for you, the seem to belong to berlin@cthulhu.fluxfingers.net on port 1504. Good Luck

Attachment: redacted

Write-up

RSA秘密鍵読経。PEMキーの一部がマスクされているがhexに直すとe, p, qの値が読めるので秘密鍵が復元できる。作成した鍵でSSHサーバにアクセスするとフラグ。

command

Other write-ups and resources

• http://duksctf.github.io/Hack.lu2016-redacted/
• http://manylostticks.blogspot.lu/2016/10/hacklu-ctf-2016-redacted-write-up.html
• https://github.com/ctfs/write-ups-2016/tree/master/hack.lu-ctf-2016/crypto/redacted-200