Ensure no admin role membership in MSDB database

MediaNivel 1Automatizadamssql

Descripción

Based on Microsoft design an account with DB_OWNER can elevate permissions to SYSADMIN Default: Default value is that only dbo user is member of db_owner role in MSDB database 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 msdb.sys.database_role_members AS drm JOIN msdb.sys.database_principals AS r ON drm.role_principal_id = r.principal_id JOIN msdb.sys.database_principals AS m ON drm.member_principal_id = m.principal_id WHERE r.name IN ('db_owner','db_securityadmin','db_ddladmin','db_datawriter') AND m.name <> 'dbo';"

Salida esperada: 0

Cómo se corrige

Método de corrección: Guía o parche de infraestructura

USE [msdb] GO ALTER ROLE [db_owner] DROP MEMBER <username>;

Propiedades

Sistemas operativos: Cualquiera
Etiquetas: mssqldatabaseprivileges
Referencia: CIS Microsoft SQL Server 2025 Benchmark v1.0.0 - 3.13 Ensure no admin role membership in MSDB database

Verificar este host

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

shell

tmaegis scan --target mssql