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← Back to MS SQL Server 2016 Instance Security Technical Implementation Guide

V-214028

CAT I (High)

The SQL Server default account [sa] must be disabled.

Rule ID

SV-214028r1137654_rule

STIG

MS SQL Server 2016 Instance Security Technical Implementation Guide

Version

V3R6

CCIs

CCI-000213

Discussion

SQL Server's [sa] account has special privileges required to administer the database. The [sa] account is a well-known SQL Server account and is likely to be targeted by attackers and thus more prone to providing unauthorized access to the database. This [sa] default account is administrative and could lead to catastrophic consequences, including the complete loss of control over SQL Server. If the [sa] default account is not disabled, an attacker might be able to gain access through the account. SQL Server by default disables the [sa] account at installation. Some applications that run on SQL Server require the [sa] account to be enabled for the application to function properly. These applications that require the [sa] account to be enabled are usually legacy systems.

Check Content

Check SQL Server settings to determine if the [sa] (system administrator) account has been disabled by executing the following query:

USE master;
GO
SELECT name, is_disabled
FROM sys.sql_logins
WHERE principal_id = 1;
GO

Verify that the "name" column contains the current name of the [sa] database server account.

If the "is_disabled" column is not set to "1", this is a finding.

Fix Text

Modify the enabled flag of SQL Server's [sa] (system administrator) account by running the following script.
USE master; 
GO 
ALTER LOGIN [sa] DISABLE; 
GO