Querying secure information from a restored master database backup _ security content from sql server pro

At this point this confirms that I successfully took an existing backup of master and restored it as a copy of the master database on another instance with a login that only had db_creator permissions on the instance. Qmobile data recovery software This also highlights that when you restore a database it will be owned by the login it was restored under by default. Tally erp 9 data recovery software It’s interesting to note here as well tha your query results against system tables you are granted implicit rights to as a member of a system role (in this case just db_creator) are filtered to just those databases/permissions therein that you’ve rights.

The original question was whether it was possible to restore a copy of master and then query for login information.


7 databases in 7 weeks I’ll address that first with the following query:

At this point I’m executing this query as the lower privileged “NotIt” login. 3 database models Let’s look at the results of this query with that understanding:

It “appears” as though we’re seeing results from a query against the sys.server_prinicpals system table in the restored copy of master from the other SQL Server instance. Database programmer salary However something isn’t right here. Database developer salary Do you see it? The NotIt login didn’t exist on the other instance – the one from which the backup of master is sourced. Since I’m curious I’ll re-run this same query logged into this second instance with sysadmin permissions which grant me access to all the metadata hosted in any user and system database. Data recovery agent When doing so these are the results we receive:

This is interesting isn’t it? The NotIt login owns the restored copy of the master database and therefore should be able to gain access to all data stored within the database. Data recovery usb flash drive However it’s quite obvious something is not quite right because the results returned not only don’t show all results stored in the database but also include the NotIt login that clearly didn’t exist on the instance where the master database backup is derived.

This goes back a few years: to 2005 matter of fact. Data recovery windows That was when the master database ceased being the source-of-truth for much of the instance metadata and was replaced in that role by the resource database which end users, not even sysadmin role members, can query directly. Database definition What you’re seeing in these results is the behavior that now exists within the master database: that what appear to be listed as system tables are in fact views that are sourced from the resource database. Data recovery definition This means that even though you restored master from another instance when you query the “tables” we did above: sys.databases, sys.server_principals, sys.server_role_members you’re in fact querying system views that source back to the current instance’s resource database. Database or database That is why you only see results you’re rights allow you to see which in this case are just the always-exitsing sa and the current login: NotIt. Data recovery software windows It also explains the existence of the login that didn’t exist on the original instance as well as why a more privileged account can see more results with the same query.

This covers the behavior with any and all metadata sourced from the resource database. Cost of data recovery But what about those violations of Best Practice when database administrators create objects in the master database such as user tables and stored procedures?

Before I took a backup of the master database I created some tables for my son Trevor’s marching band’s uniform database I’m building as a hobby. Database first entity framework Consider the list below when I run it against the original master database as a sysadmin:

Even though the login is owner of the database it has not been granted implicit permissions on the user tables. Data recovery iphone 5 This does not prevent a login with rights to grant permissions from doing so on this new instance however. Raid 0 data recovery If the user who has restored the copy of master to the new instance has rights to do so they could easily see all the user-created objects just as they could with any non-system database.

So the answer is “No”. 7 data recovery serial key Even though you can restore a copy of master and query against it. Database modeling You not only can’t see complete login information since it’s a system view populated from the current instance’s resource database but you’re also precluded from seeing user-created objects and querying against them until you’re granted the proper rights to them through the regular means on the new instance by a login with the rights to do so. A database record is an entry that contains You should always take precautions to properly secure any and all backups for your databases because as you can see here anyone with the ability to get to your databases can restore them elsewhere and eventually gain access to the secrets they contain if given proper rights.

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