The archaeological team at ångstromCTF has uncovered an archive from over 100 years ago! Can you read the contents?
Access the file at /problems/2021/archaic/archive.tar.gz on the shell server.
Hint
What is a .tar.gz file?
問題サーバにarchive.tar.gzが置かれているようだ。
アクセスして解凍する。
$ ssh team7901@shell.actf.co
team7901@shell.actf.co's password:
Welcome to the
_ _ __
() | | | | / _|
__ _ _ __ __ _ ___| |_ _ __ ___ _ __ ___ ___| |_| |_
/ _` | '_ \ / _` / __| __| '__/ _ \| '_ ` _ \ / __| __| _|
| (_| | | | | (_| \__ \ |_| | | (_) | | | | | | (__| |_| |
\__,_|_| |_|\__, |___/\__|_| \___/|_| |_| |_|\___|\__|_|
__/ |
|___/
shell server!
*==============================================================================*
* Please be respectful of other users. Abuse may result in disqualification. *
*Data can be wiped at ANY TIME with NO WARNING. Keep backups of important data!*
*==============================================================================*
Last login: Tue Apr 6 09:15:06 2021 from 219.126.191.19
team7901@actf:~$ tar -zxvf /problems/2021/archaic/archive.tar.gz
flag.txt
tar: flag.txt: implausibly old time stamp 1921-04-01 22:45:12
team7901@actf:~$ cat flag.txt
cat: flag.txt: Permission denied
team7901@actf:~$ chmod 777 flag.txt
team7901@actf:~$ cat flag.txt
actf{thou_hast_uncovered_ye_ol_fleg}flag.txtの中にflagが書かれていた。