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

中级别 1自动化mssql

说明

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).

检查方式

审计方法: SQL 查询

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;"

预期输出: 0

修复方式

修复方法: 操作指南或基础设施补丁

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

属性

操作系统: 任意
标签: cryptomssqlsqlserver-2022
参考: 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

检查本机

请在您有权审计的机器上运行此命令。扫描为只读操作。

shell

tmaegis scan --target mssql