关键词：Terminal devices、shell、stdio
题目入口：
（需要注册）
root@kali:~# ssh [email protected] -p 1016
[email protected]'s password:
RingZer0 Team Online CTF
BASH Jail Level 1:
Current user is uid=1000(level1) gid=1000(level1) groups=1000(level1)
Flag is located at /home/level1/flag.txt
Challenge bash code:
-----------------------------
while :
do
echo "Your input:"
read input
output=`$input`
done
-----------------------------
Your input:
先说几个关键点和概念问题，然后再分析writeup，请耐着性子看完吧