Removable media security in FreeBSD

Jon DeShirley jond at
Tue Jun 10 14:32:15 PDT 2003

On Tue, 9 Jun 2003 Brett Glass wrote:
> At 05:21 PM 6/9/2003, Doug Barton wrote:
>>On Mon, 9 Jun 2003, Brett Glass wrote:
>>>Allowing the user to use sudo would effectively be giving him/her root
>>>privileges, which we explicitly don't want to do.
>>No it wouldn't. You can specify the commands that you allow each user to
> Ah, but letting the user mount and unmount things effectively lets that
> person do anything he or she wants, by switching around what's mounted
> at key mountpoints.


%users  NOPASSWD:ALL=/sbin/mount /cdrom,/sbin/umount /cdrom

What does this do?  It allows users in the group 'users' to run the 
explicit commands ONLY.

Now, unless you give them sudo access to vi /etc/fstab or something, 
there's no way '/sbin/mount /cdrom' is going to change behavior.

btw, I would suggest reading the sudoers manual:



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