App - Système

Hi guys I managed to exploit the fgets function, problem is that when running it the shell open and close instantly and I can’t interact with it.
I tried to breakpoint at the system() address with gdb but I can’t interact with shell only gdb cmd line.
Any help would be appreciated.

SHELL TRACE ----------------------
app-systeme-ch13@challenge02 : $ cat /tmp/tleroy/exploit.txt | ./ch13

[buf] : **********************
[check] 0xdeadbeef
Yeah dude ! You win !
Opening your shell...
Shell closed ! Bye.

read more on the forum, this issue has already been answered many times