unknown user has rights in the db's

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unknown user has rights in the db's

smthembu

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Points: 3464
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December 17, 2013 at 3:52 am

#280445

Hi All,
Help me solve this quiz. I removed individual user logins and introduced group logins of which is working well. I'm baffled by one whose account can drop and do more stuff, when i check under each db and security folder the user doesnt exist. all the groups are granted correct permission
i ran xp_logininfo nothing of that user, what more can i check?
thanks
It's better to fail while trying, rather than fail without trying!!!

Viewing 9 posts - 1 through 8 (of 8 total)

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Lowell SSC Guru Points: 323518 More actions · Answer 1

i'm thinking that your user is in a windows group that grants them permissions you didn't expect.

this query seems to get all the individual mappings for all the groups i have added on my server;

from there, i can query it and find myself, and what groups i belong to:

IF OBJECT_ID('tempdb.dbo.#tmp') IS NOT NULL

DROP TABLE #tmp

CREATE TABLE [dbo].[#TMP] (

[ACCOUNT NAME] NVARCHAR(256) NULL ,

[TYPE] VARCHAR(8) NULL ,

[PRIVILEGE] VARCHAR(8) NULL ,

[MAPPED LOGIN NAME] NVARCHAR(256) NULL ,

[PERMISSION PATH] NVARCHAR(256) NULL )

DECLARE @groupname NVARCHAR(256)

DECLARE c1 CURSOR FOR SELECT name FROM master.sys.server_principals WHERE type_desc = 'WINDOWS_GROUP' AND CHARINDEX('$',name) = 0

OPEN c1

FETCH NEXT FROM c1 INTO @groupname

WHILE @@FETCH_STATUS <> -1

BEGIN

INSERT INTO #tmp([ACCOUNT NAME],[TYPE],[PRIVILEGE],[MAPPED LOGIN NAME],[PERMISSION PATH])

EXEC master..xp_logininfo @acctname = @groupname,@option = 'members' -- show group members

FETCH NEXT FROM c1 INTO @groupname

END

CLOSE c1

DEALLOCATE c1

SELECT * FROM [#TMP]

--WHERE [MAPPED LOGIN NAME] = 'mydomain\Lowell'

Lowell

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Andreas.Wolter SSCommitted Points: 1780 More actions · Answer 2

When You impersonate that user and tun SELECT USER_NAME(), what do you get?

Next: what does sys.fn_mypermissions return?

Andreas

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Microsoft Certified Master SQL Server 2008
Microsoft Certified Solutions Master Data Platform, SQL Server 2012
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smthembu Hall of Fame Points: 3464 More actions · Answer 3

Thanks for the response will test and advise

It's better to fail while trying, rather than fail without trying!!!

smthembu Hall of Fame Points: 3464 More actions · Answer 4

I ran the command from his SSMS then return "guest" but the user guest is disabled from the user db's only active in the master and tempdb

It's better to fail while trying, rather than fail without trying!!!

Andreas.Wolter SSCommitted Points: 1780 More actions · Answer 5

what do the following DMVs return?

select * from sys.user_token

select * from sys.login_token

use impersonation, so you can copy the result

->

execute as login = 'XYZ'

Andreas

---------------------------------------------------
MVP SQL Server
Microsoft Certified Master SQL Server 2008
Microsoft Certified Solutions Master Data Platform, SQL Server 2012
www.insidesql.org/blogs/andreaswolter
www.andreas-wolter.com

smthembu Hall of Fame Points: 3464 More actions · Answer 6

Please attachement when running user_token

It's better to fail while trying, rather than fail without trying!!!

Andreas.Wolter SSCommitted Points: 1780 More actions · Answer 7

Well

as you can see, your user is member of the Windows Group "Domain\SHR_Dev"

and thereby member of the db_datareader database role inside this database

But you said that at the same time that user's user-name is "guest"? This doesn't make sense at all to me. It should show up as "Domain\SHR_Dev".

Also do a check for permissions for that individual with the function I provided..

Andreas

---------------------------------------------------
MVP SQL Server
Microsoft Certified Master SQL Server 2008
Microsoft Certified Solutions Master Data Platform, SQL Server 2012
www.insidesql.org/blogs/andreaswolter
www.andreas-wolter.com

smthembu Hall of Fame Points: 3464 More actions · Answer 8

when i ran it first time i was on the master db, then connected to the user db

It's better to fail while trying, rather than fail without trying!!!