TMA-MSSQL2022-3.13

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 MSDBmust be configured with the TRUSTWORTHY flag ON to work properly. If the TRUSTWORTHY setting is set to ON, and if the owner of the database is a member of a group that has administrative credentials, such as the sysadmin group (for example the default sa login), the database owner can then be able to create and run unsafe assemblies that can compromise the instance of the SQL Server, as well as run code to elevate his privileges to SYSADMIN

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: iammssqlsqlserver-2022
Referencia: CIS Microsoft SQL Server 2022 Benchmark v1.3.0 - 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