TMA-MSSQL-3.9

Ensure Windows BUILTIN groups are not SQL Logins

MediaNivel 1Automatizadamssql

Descripción

Prior to SQL Server 2008, the BUILTIN\Administrators group was added as a SQL Server login with sysadmin privileges during installation by default. Best practices promote creating an Active Directory level group containing approved DBA staff accounts and using this controlled AD group as the login with sysadmin privileges. The AD group should be specified during SQL Server installation and the BUILTIN\Administrators group would therefore ... On AWS RDS a lone [BUILTIN]\Administrators login is acceptable. Default: By default, no BUILTIN groups are added as SQL logins. Runs one sqlcmd query with its defaults (Windows authentication to the local default instance); set SQLCMDSERVER, SQLCMDUSER and SQLCMDPASSWORD for another instance or SQL authentication. Needs VIEW SERVER STATE / sysadmin-level read access.

Cómo se verifica

Método de auditoría: Consulta SQL

sql_query

sqlcmd -b -h -1 -W -Q "SET NOCOUNT ON; SELECT COUNT(*) FROM sys.server_principals pr JOIN sys.server_permissions pe ON pr.principal_id = pe.grantee_principal_id WHERE pr.name LIKE 'BUILTIN%';"

Salida esperada: 0

Cómo se corrige

Método de corrección: Guía o parche de infraestructura

1. For each BUILTIN login, if needed create a more restrictive AD group containing only the required user accounts. 2. Add the AD group or individual Windows accounts as a SQL Server login and grant it the permissions required. 3. Drop the BUILTIN login using the syntax below after replacing <name> in [BUILTIN\<name>]. USE [master] GO DROP LOGIN [BUILTIN\<name>] GO

Propiedades

Sistemas operativos: Cualquiera
Etiquetas: mssqldatabaseprivileges
Referencia: CIS Microsoft SQL Server 2025 Benchmark v1.0.0 - 3.9 Ensure Windows BUILTIN groups are not SQL Logins

Verificar este host

Ejecute esto en un equipo que tenga permiso para auditar. El escaneo es de solo lectura.

shell

tmaegis scan --target mssql