about permissions...

[Henriksen, Jonas F]

Hi,

how come, if you create a user with no permissions at all, having been granted nothing, he can still log into any database, list available tables, create new here, and then delete them again. Seems odd...:

medusa:~% createuser odd
Shall the new user be allowed to create databases? (y/n) n
Shall the new user be allowed to create more new users? (y/n) n
CREATE USER
medusa:~% psql -U odd cnv
Welcome to psql 7.3.7, the PostgreSQL interactive terminal.

Type: \copyright for distribution terms
\h for help with SQL commands
\? for help on internal slash commands
\g or terminate with semicolon to execute query
\q to quit

cnv=> \dt
List of relations
Schema | Name | Type | Owner
--------+---------------+-------+---------
public | theaders | table | jonasfh
public | theadervalues | table | jonasfh
(2 rows)

cnv=> create table oddtable();
CREATE TABLE
cnv=> \dt
List of relations
Schema | Name | Type | Owner
--------+---------------+-------+---------
public | oddtable | table | odd
public | theaders | table | jonasfh
public | theadervalues | table | jonasfh

(3 rows)

cnv=> drop table oddtable;
DROP TABLE

Is this right, or is there something wrong with my settings in some way?

regards Jonas:))

--
Jonas F Henriksen
Institute of Marine Research
Norsk Marint Datasenter
PO Box 1870 Nordnes
5817 Bergen
Norway

Phone: +47 55238441


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[Richard Huxton]

Re: about permissions...

Henriksen, Jonas F wrote:[color=blue]
> Hi,
>
> how come, if you create a user with no permissions at all, having
> been granted nothing, he can still log into any database, list
> available tables, create new here, and then delete them again. Seems
> odd...:[/color]
[color=blue]
> Is this right, or is there something wrong with my settings in some
> way?[/color]

Schema public has default access to group public, which your new user
has access to...

richardh=# GRANT ALL ON SCHEMA public TO richardh;
GRANT
richardh=# SELECT * FROM pg_namespace ;
nspname | nspowner | nspacl
-------------+----------+-------------------
public | 1 | {=UC,richardh=U C}
....

richardh=# REVOKE ALL ON SCHEMA public FROM GROUP public;
REVOKE
richardh=# SELECT * FROM pg_namespace ;
nspname | nspowner | nspacl
-------------+----------+-----------------
public | 1 | {=,richardh=UC}
....

*DO* make sure that one user has explict access before revoking all on
public though.

--
Richard Huxton
Archonet Ltd

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