この大会は2019/10/12 11:00(JST)～2019/10/14 11:00(JST)に開催されました。
今回もチームで参戦。結果は1440点で662チーム中47位でした。
Welcome問題しか解けていませんが、
自分で解けた問題をWriteupとして書いておきます。
Welcome (welcome)
sshで接続すると、viの画面になるので、抜けると、フラグが表示された。
$ ssh welcome@52.68.122.76 The authenticity of host '52.68.122.76 (52.68.122.76)' can't be established. ECDSA key fingerprint is SHA256:tyMrlKbDsFPOJTzt4NyWXaFr8s6nJmOj9hWyAyDegLA. Are you sure you want to continue connecting (yes/no)? yes Warning: Permanently added '52.68.122.76' (ECDSA) to the list of known hosts. welcome@52.68.122.76's password: Welcome to Ubuntu 18.04.3 LTS (GNU/Linux 4.15.0-1051-aws x86_64) * Documentation: https://help.ubuntu.com * Management: https://landscape.canonical.com * Support: https://ubuntu.com/advantage System information as of Sat Oct 12 02:02:16 UTC 2019 System load: 0.59 Processes: 205 Usage of /: 24.0% of 7.69GB Users logged in: 2 Memory usage: 6% IP address for eth0: 172.31.23.249 Swap usage: 0% * Kata Containers are now fully integrated in Charmed Kubernetes 1.16! Yes, charms take the Krazy out of K8s Kata Kluster Konstruction. https://ubuntu.com/kubernetes/docs/release-notes 3 packages can be updated. 0 updates are security updates. The programs included with the Ubuntu system are free software; the exact distribution terms for each program are described in the individual files in /usr/share/doc/*/copyright. Ubuntu comes with ABSOLUTELY NO WARRANTY, to the extent permitted by applicable law. The programs included with the Ubuntu system are free software; the exact distribution terms for each program are described in the individual files in /usr/share/doc/*/copyright. Ubuntu comes with ABSOLUTELY NO WARRANTY, to the extent permitted by applicable law. Last login: Sat Oct 12 02:02:13 2019 from 106.154.93.42 ~ ~ ~ ~ ~ VIM - Vi IMproved ~ ~ version 8.0.1453 ~ by Bram Moolenaar et al. ~ Modified by pkg-vim-maintainers@lists.alioth.debian.org ~ Vim is open source and freely distributable ~ ~ Help poor children in Uganda! ~ type :help iccf<Enter> for information ~ ~ type :q<Enter> to exit ~ type :help<Enter> or <F1> for on-line help ~ type :help version8<Enter> for version info ~ ~ ~ ~ ~ hitcon{Exit Vim and enter HITCON CTF 2019!} Connection to 52.68.122.76 closed.
hitcon{Exit Vim and enter HITCON CTF 2019!}
