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Re: Non-superuser subscription owners

Jeff Davis <pgsql@j-davis.com>

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From: Jeff Davis <pgsql@j-davis.com>
To: Andres Freund <andres@anarazel.de>, Robert Haas <robertmhaas@gmail.com>
Cc: Mark Dilger <mark.dilger@enterprisedb.com>, Amit Kapila <amit.kapila16@gmail.com>, Andrew Dunstan <andrew@dunslane.net>, PostgreSQL-development <pgsql-hackers@postgresql.org>
Date: 2023-01-22T17:05:27Z
Lists: pgsql-hackers 
On Sat, 2023-01-21 at 14:01 -0800, Andres Freund wrote:
> There are good reasons to have 'peer' authentication set up for the
> user
> running postgres, so admin scripts can connect without issues. Which
> unfortunately then also means that postgres_fdw etc can connect to
> the current
> database as superuser, without that check. Which imo clearly is an
> issue.

Perhaps we should have a way to directly turn on/off authentication
methods in libpq through API functions and/or options?

This reminds me of the "channel_binding=required" option. We considered
some similar alternatives for that feature.

> Why is this only about local files, rather than e.g. also using the
> local
> user?

It's not, but we happen to already have pg_read_server_files, and it
makes sense to use that at least for files referenced directly in the
connection string. You're right that it's incomplete, and also that it
doesn't make a lot of sense for files accessed indirectly.


-- 
Jeff Davis
PostgreSQL Contributor Team - AWS

Commits

Same data as JSON: GET /api/v1/messages/:b64id/commits the thread's linked commits as JSON, with link sources. API reference →

  1. Fix possible crash in tablesync worker.

  2. Display 'password_required' option for \dRs+ command.

  3. Restart the apply worker if the 'password_required' option is changed.

  4. Fix possible logical replication crash.

  5. Add new predefined role pg_create_subscription.

  6. Expand AclMode to 64 bits

  7. More cleanup of a2ab9c06ea.

  8. Respect permissions within logical replication.

  9. Improve table locking behavior in the face of current DDL.