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Cc: Yuri , Brooks Davis , Felix Palmen References: To: ports@freebsd.org From: Tatsuki Makino Message-ID: Date: Wed, 10 May 2023 06:12:38 +0900 User-Agent: Mozilla/5.0 (X11; FreeBSD amd64; rv:52.0) Gecko/20100101 Firefox/52.0 SeaMonkey/2.49.4 In-Reply-To: Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-TMN: [+Ksm2tEKF62dRYaz1VYOIOAAYX2yaIo0] X-ClientProxiedBy: SI2PR01CA0016.apcprd01.prod.exchangelabs.com (2603:1096:4:191::20) To PSAPR03MB5639.apcprd03.prod.outlook.com (2603:1096:301:66::13) X-Microsoft-Original-Message-ID: List-Id: Porting software to FreeBSD List-Archive: https://lists.freebsd.org/archives/freebsd-ports List-Help: List-Post: List-Subscribe: List-Unsubscribe: Sender: owner-freebsd-ports@freebsd.org X-BeenThere: freebsd-ports@freebsd.org MIME-Version: 1.0 X-MS-Exchange-MessageSentRepresentingType: 1 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: PSAPR03MB5639:EE_|SI2PR03MB5547:EE_ X-MS-Office365-Filtering-Correlation-Id: 87b3b11a-52af-43c1-8117-08db50d22619 X-MS-Exchange-SLBlob-MailProps: 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 X-Microsoft-Antispam: BCL:0; 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REPLY(-4.00)[]; ASN(0.00)[asn:8075, ipnet:40.80.0.0/12, country:US] X-Rspamd-Pre-Result: action=no action; module=replies; Message is reply to one we originated X-ThisMailContainsUnwantedMimeParts: N locate.database is created by /etc/periodic/weekly/310.locate, isn't it? It's behavior is run by nobody. The other thing that is often forgotten is that the group behaves as if a setgid bit has been set up in the directory. Is the idea that one daemon-specific user is sufficient, as long as setegid, seteuid, umask, fileowner, filepermission, and these settings are appropriate, out of date? :) Yuri wrote on 2023/05/09 17:19: > Brooks Davis wrote: >> On Tue, May 09, 2023 at 10:05:15AM +0200, Felix Palmen wrote: >>> * Felix Palmen [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- >> >> This seems like a bug. > > Indeed, it's even in BUGS section in locate(1) :) > > The locate database is typically built by user “nobody” and the > locate.updatedb(8) utility skips directories which are not readable for > user “nobody”, group “nobody”, or world. For example, if your HOME > directory is not world-readable, none of your files are in the > database. > >>> >>> 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? >> >> This is clearly the right choice even it's a bit of a pain. > >