Re: dblink connection security

From: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
To: Joe Conway <mail(at)joeconway(dot)com>
Cc: Stephen Frost <sfrost(at)snowman(dot)net>, Magnus Hagander <magnus(at)hagander(dot)net>, Robert Treat <xzilla(at)users(dot)sourceforge(dot)net>, Gregory Stark <stark(at)enterprisedb(dot)com>, pgsql-patches <pgsql-patches(at)postgresql(dot)org>
Subject: Re: dblink connection security
Date: 2007-07-07 15:19:03
Message-ID: 1836.1183821543@sss.pgh.pa.us
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Joe Conway <mail(at)joeconway(dot)com> writes:
> What about using the attached for 8.3, as well as earlier?

> It simply does not allow the local database user to become someone else
> on the libpq remote connection unless they are a superuser.

This assumes that usernames on the remote site are equivalent to those
locally. Which is helpful for the sort of local-loop scenarios we've
been thinking about, but is hardly watertight even then (consider
multiple postmasters on one machine). For remote connections it seems
counterproductive; you might as well say "you must be superuser" and
keep it simple.

regards, tom lane

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