Information
Within the database, object ownership implies full privileges to the owned object, including the privilege to assign access to the owned objects to other subjects. Database functions and procedures can be coded using definer's rights. This allows anyone who utilizes the object to perform the actions if they were the owner. If not properly managed, this can lead to privileged actions being taken by unauthorized individuals.
Conversely, if critical tables or other objects in SQL Server rely on unauthorized owner accounts, these objects may be lost when an account is removed.
NOTE: Nessus has provided the target output to assist in reviewing the benchmark to ensure target compliance.
Solution
Add and/or update system documentation to include any accounts authorized for object ownership and remove any account not authorized.
To change the schema owning a database object in SQL Server, use this code as an example:
USE AdventureWorks2012;
GO
ALTER SCHEMA HumanResources TRANSFER Person.Address;
GO
Caution: This can break code. This Fix should be implemented in conjunction with corrections to such code. Test before deploying in production. Deploy during a scheduled maintenance window.