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Re: Default privileges for new databases (was Re: Can't

From: Rod Taylor <rbt(at)zort(dot)ca>
To: Bruce Momjian <pgman(at)candle(dot)pha(dot)pa(dot)us>
Cc: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, Ron Snyder <snyder(at)roguewave(dot)com>,Peter Eisentraut <peter_e(at)gmx(dot)net>,pgsql-hackers <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: Default privileges for new databases (was Re: Can't
Date: 2002-08-27 03:56:05
Message-ID: 1030420566.33213.21.camel@jester (view raw or flat)
Thread:
Lists: pgsql-hackers
On Mon, 2002-08-26 at 23:45, Bruce Momjian wrote:
> 
> Oh, so we don't modify public writeability of template1 because the
> admin may want to disable write in template1 so all future databases
> will have it disabled.  I see.
> 
> So template1 is writable (yuck) only so databases created from template1
> are writeable to world by default.  Is that accurate?

I believe thats the crux of the issue -- but those of us who don't want
newly created DBs to be world writable have no issues with that :)


Could create a template2 as the default 'copy from' template.  Make it
connectible strictly by superusers.  Template1 becomes a holding area
for those without a db to connect to and can be locked down.


Another is to enable users to connect to the server without requiring a
database.  This basically removes the secondary requirement of template1
to be the holding area for those otherwise without a home.


> ---------------------------------------------------------------------------
> 
> Rod Taylor wrote:
> > Mostly because a user may explicitly create a database with wanted
> > permissions, only to have this 'special code' remove them.
> > 
> > I personally intend to immediately revoke permissions on public in
> > template1, to allow the database owner to grant them as needed.
> > 
> > On Mon, 2002-08-26 at 22:27, Bruce Momjian wrote:
> > > 
> > > Sorry, I am confused.  Why can we modify temp's permissions on CREATE
> > > DATABASE but not public's permissions?
> > > 
> > > ---------------------------------------------------------------------------
> > > 
> > > Tom Lane wrote:
> > > > Bruce Momjian <pgman(at)candle(dot)pha(dot)pa(dot)us> writes:
> > > > > Have we addressed this?  I don't think so.
> > > > 
> > > > No, it's not done yet.  My inclination is
> > > > 
> > > > * Template1 has temp table creation and schema creation disabled
> > > > (disallowed to world) by default.
> > > > 
> > > > * CREATE DATABASE sets up new databases with temp table creation allowed
> > > > to world and schema creation allowed to DB owner only (regardless of
> > > > what the template database had).  The owner can adjust this default
> > > > afterwards if he doesn't like it.
> > > > 
> > > > It would be nice to lock down the public schema in template1 too, but I
> > > > see no good way to do that, because CREATE DATABASE can't readily fiddle
> > > > with protections *inside* the database --- the only games we can play
> > > > are with the protections stored in the pg_database row itself.  So
> > > > public's permissions are going to be inherited from the template
> > > > database, and that means template1's public has to be writable.
> > > > 
> > > > Objections anyone?
> > > > 
> > > > 			regards, tom lane
> > > > 
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> > > -- 
> > >   Bruce Momjian                        |  http://candle.pha.pa.us
> > >   pgman(at)candle(dot)pha(dot)pa(dot)us               |  (610) 359-1001
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> -- 
>   Bruce Momjian                        |  http://candle.pha.pa.us
>   pgman(at)candle(dot)pha(dot)pa(dot)us               |  (610) 359-1001
>   +  If your life is a hard drive,     |  13 Roberts Road
>   +  Christ can be your backup.        |  Newtown Square, Pennsylvania 19073
> 



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Subject: Re: Default privileges for new databases (was Re: Can't
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