aterm 0.4.2 tty permission weakness
Aterm has an issue with creating a terminal.
A quick ?ls ?al? on a aterm with ?mesg y? shows:
crw--w--w- 1 alsdk users 5, 3 Jul 13 17:27 /dev/ttyp3
with ?mesg n?:
crw-----w- 1 alsdk users 5, 3 Jul 13 17:28 /dev/ttyp3
1) World (nobody) is able to ?echo? or ?cat? towards the terminal
echo ?hello? >> /dev/ttyp3
cat mkdir >> /dev/ttyp3
2) The group seems to be incorrect, a normal terminal has default group tty
A xterm with ?mesg y? shows :
crw--w---- 1 ttielu tty 5, 5 Jul 13 17:27 ttyp5
and with ?mesg n? :
crw------- 1 ttielu tty 5, 5 Jul 13 17:27 ttyp5
Advice: use xterm
Bug found by TTIelu, reverse engineered by alsdk and TTIelu