TMA-MSSQL-7.1

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

中レベル 1自動mssql

説明

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.

チェック方法

監査方法: SQL クエリ

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;"

期待される出力: 0

修正方法

修正方法: ガイダンスまたは IaC パッチ

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

プロパティ

オペレーティングシステム: すべて
タグ: mssqldatabaseencryption
参照: 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

このホストをチェック

監査が許可されているマシンで実行してください。スキャンは読み取り専用です。

shell

tmaegis scan --target mssql