TMA-MSSQL-7.1

Ensure 'Symmetric Key encryption algorithm' is set to 'AES_128' or higher in non-system databases

MediaNivel 1Automatizadamssql

Descripción

Per the Microsoft Best Practices, only the SQL Server AES algorithm options, AES_128, AES_192, and AES_256, should be used for a symmetric key encryption algorithm. Iterates user databases (database_id > 4). Default: none 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; DECLARE @n int = 0, @k int, @db sysname, @s nvarchar(max); DECLARE c CURSOR LOCAL FAST_FORWARD FOR SELECT name FROM sys.databases WHERE state = 0 AND HAS_DBACCESS(name) = 1 AND database_id > 4; OPEN c; FETCH NEXT FROM c INTO @db; WHILE @@FETCH_STATUS = 0 BEGIN SET @s = N'USE ' + QUOTENAME(@db) + N'; SELECT @k = COUNT(*) FROM (SELECT name FROM sys.symmetric_keys WHERE algorithm_desc NOT IN (''AES_128'',''AES_192'',''AES_256'')) AS x;'; EXEC sp_executesql @s, N'@k int OUTPUT', @k = @k OUTPUT; SET @n = @n + @k; FETCH NEXT FROM c INTO @db; END; CLOSE c; DEALLOCATE c; SELECT @n;"

Salida esperada: 0

Cómo se corrige

Método de corrección: Guía o parche de infraestructura

Refer to Microsoft SQL Server Books Online ALTER SYMMETRIC KEY entry: https://docs.microsoft.com/en-us/sql/t-sql/statements/alter-symmetric-key-transact-sql

Propiedades

Sistemas operativos: Cualquiera
Etiquetas: mssqldatabaseencryption
Referencia: CIS Microsoft SQL Server 2025 Benchmark v1.0.0 - 7.1 Ensure 'Symmetric Key encryption algorithm' is set to 'AES_128' or higher in non-system databases

Verificar este host

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

shell

tmaegis scan --target mssql