chroot security questions

[wduric]

Dears,

I have plesk 12.0 and discovered in directory /var/www/vhosts/chroot following:
drwxr-xr-x. 3 root root 4096 Feb 1 12:57 bin
drwxr-xr-x. 2 root root 4096 Feb 1 12:57 dev
drwxr-xr-x. 2 root root 4096 Feb 1 12:57 etc
drwxr-xr-x. 2 root root 4096 Feb 1 12:57 lib
drwxr-xr-x. 2 root root 4096 Feb 1 12:57 lib64
drwxrwxrwt. 2 root root 4096 Feb 1 12:57 tmp
drwxr-xr-x. 4 root root 4096 Feb 1 12:57 usr
drwxr-xr-x. 3 root root 4096 Feb 1 12:57 var

in ./bin I can even find
-rwxr-xr-x. 1 root root 52656 Jun 22 2012 touch

knowing that touch can be use to change the date of a file, I wonder if there is not a security danger of having all these commands available on chroot.

I have been searching if I shoud not better to restrict the execution of some exe to only root userid.

Should I take some actions with these directories ? what is your point of vue ?