In-kernel pfexec implementation. [PSARC/2009/377 FastTrack timeout 07/10/2009]

[Nicolas Williams]

On Sun, Jul 05, 2009 at 05:01:00PM +0200, Casper.Dik at Sun.COM wrote:
> 
> >On Fri, Jul 03, 2009 at 02:08:07PM +0100, Darren J Moffat wrote:
> >> >The pfexecd is started at boot through SMF as "svc:/system/pfexecd".
> >> 
> >> I'm assuming here that pfexecd is running as root with all privileges ?
> >> Or is it able to run with a reduced set (for example pfexecd shouldn't I 
> >> think need most of the current basic privs or file_write from the new 
> >> set in PSARC/2009/378).  Though it feels to me like it should be running 
> >> with all privs because other wise a lower privileged process is acting 
> >> as an authority to hand out privs it doesn't actually have.
> >
> >What's wrong with pfexecd dropping privs after registering its door with
> >the kernel?
> 
> Because lesser privilege processes could subvert it.

SNOCD wouldn't prevent that?