Re: Unprivileged default user for "tiny" daemons?

From: Felix Palmen <zirias_at_FreeBSD.org>
Date: Tue, 09 May 2023 08:05:15 UTC
* Felix Palmen <zirias@FreeBSD.org> [20230508 18:39]:
> I tend to think now that 'daemon' should really be the way to go when
> you don't need a dedicated account. Am I overlooking something? Any
> other comments?

Seems I overlooked something indeed:

#v+
$ find [14-jail] \( -user daemon -or -group daemon \)
[14-jail]/usr/sbin/lpc
[14-jail]/usr/bin/lprm
[14-jail]/usr/bin/lpr
[14-jail]/usr/bin/lpq
[14-jail]/var/rwho
[14-jail]/var/spool/mqueue
[14-jail]/var/spool/lpd
[14-jail]/var/spool/output
[14-jail]/var/spool/output/lpd
[14-jail]/var/spool/opielocks
[14-jail]/var/at/jobs
[14-jail]/var/at/spool
[14-jail]/var/msgs
#v-

So, daemon owns e.g. the print spool...

Interestingly, ou even find something owned by nobody in base:

#v+
-rw-r--r--  1 nobody  wheel  0 Jul  8  2021 /var/db/locate.database
#v-

So, takeaway is: There is no safe choice other than allocating a
dedicated UID for every single daemon, even if it doesn't need to
own/access any files? Is this really correct?

Cheers, Felix

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