Ensure Asymmetric Key Size is set to 'greater than or equal to 2048' in non-system databases

中等級 1自動化mssql

說明

Microsoft Best Practices recommend to use at least a 2048-bit encryption algorithm for asymmetric keys. The RSA_2048 encryption algorithm for asymmetric keys in SQL Server is the highest bit-level provided and therefore the most secure available choice (other choices are RSA_512 and RSA_1024).

檢查方式

稽核方法: SQL 查詢

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.asymmetric_keys WHERE key_length < 2048) 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;"

預期輸出: 0

修補方式

修補方法: 操作指南或基礎設施修補檔

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

屬性

作業系統: 不限
標籤: cryptomssqlsqlserver-2022
參考資料: CIS Microsoft SQL Server 2022 Benchmark v1.3.0 - 7.2 Ensure Asymmetric Key Size is set to 'greater than or equal to 2048' in non-system databases

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請在您有權稽核的機器上執行此指令。掃描為唯讀操作。

shell

tmaegis scan --target mssql