SQL Server must enforce access control policies to restrict the Alter any connection permission to only authorized roles.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-41297	SQL2-00-002900	SV-53779r1_rule		Medium

Description
The concept of least privilege must be applied to SQL Server processes, ensuring that the processes operate at privilege levels no higher than necessary to accomplish required organizational missions and/or functions. Organizations consider the creation of additional processes, roles, and SQL Server accounts as necessary to achieve least privilege. Organizations also apply least privilege concepts to the design, development, implementation, and operations of SQL Server and the OS. Unauthorized access to sensitive data or SQL Server control may compromise the confidentiality of personnel privacy, threaten national security, compromise a variety of other sensitive operations, or lead to a loss of system control. Access controls are best managed by defining requirements based on distinct job functions and assigning access based on the job function assigned to the individual user. SQL Server's 'Alter any connection' permission is a high server-level privilege that must only be granted to individual administration accounts through roles. If the 'Alter any connection' permission is granted to roles that are unauthorized to have this privilege, then this access must be removed.

Description

The concept of least privilege must be applied to SQL Server processes, ensuring that the processes operate at privilege levels no higher than necessary to accomplish required organizational missions and/or functions. Organizations consider the creation of additional processes, roles, and SQL Server accounts as necessary to achieve least privilege. Organizations also apply least privilege concepts to the design, development, implementation, and operations of SQL Server and the OS. Unauthorized access to sensitive data or SQL Server control may compromise the confidentiality of personnel privacy, threaten national security, compromise a variety of other sensitive operations, or lead to a loss of system control. Access controls are best managed by defining requirements based on distinct job functions and assigning access based on the job function assigned to the individual user. SQL Server's 'Alter any connection' permission is a high server-level privilege that must only be granted to individual administration accounts through roles. If the 'Alter any connection' permission is granted to roles that are unauthorized to have this privilege, then this access must be removed.

STIG	Date
Microsoft SQL Server 2012 Database Instance Security Technical Implementation Guide	2014-01-17

Details

Check Text ( C-47865r2_chk )
Obtain the list of roles that are authorized for the SQL Server 'Alter any connection' permission and what 'Grant', 'Grant With', and/or 'Deny' privilege is authorized. Obtain the list of roles with that permission by running the following query: Select * from sys.server_permissions where permission_name = 'Alter any connection' If any rows are returned, run the following query, substituting the with those returned in the previous query. Select * from sys.server_principals where type = 'R' and principal_id = If any role has 'Grant', 'With Grant', or 'Deny' privileges to the 'Alter any connection' permission and the user is not authorized to have the permission, this is a finding.

Check Text ( C-47865r2_chk )

Obtain the list of roles that are authorized for the SQL Server 'Alter any connection' permission and what 'Grant', 'Grant With', and/or 'Deny' privilege is authorized. Obtain the list of roles with that permission by running the following query:

Select * from sys.server_permissions where permission_name = 'Alter any connection'

If any rows are returned, run the following query, substituting the with those returned in the previous query.

Select * from sys.server_principals where type = 'R' and principal_id =

If any role has 'Grant', 'With Grant', or 'Deny' privileges to the 'Alter any connection' permission and the user is not authorized to have the permission, this is a finding.

Fix Text (F-46688r1_fix)
Remove the 'Alter any connection' permission access from the role that is not authorized by executing the following query: REVOKE Alter any connection TO <'role name'>