TMA-MSSQL2022-3.2

Ensure CONNECT permissions on the 'guest' user is Revoked within all SQL Server databases

中等級 1自動化mssql

說明

Remove the right of the guest user to connect to SQL Server databases, except for master, msdb, tempdb, and, on AWS RDS instances, rdsadmin. A login assumes the identity of the guest user when a login has access to SQL Server but does not have access to a database through its own account and the database has a guest user account. Revoking the CONNECT permission for the guest user will ensure that a login is not able to access database information without explicit access to do so.

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 name NOT IN ('master','tempdb','msdb'); 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 permission_name FROM sys.database_permissions WHERE grantee_principal_id = DATABASE_PRINCIPAL_ID(''guest'') AND state_desc LIKE ''GRANT%'' AND permission_name = ''CONNECT'') 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

The following code snippet revokes CONNECT permissions from the guest user in a database. Replace <database_name> as appropriate: USE <database_name>; GO REVOKE CONNECT FROM guest;

屬性

作業系統: 不限
標籤: access-controlmssqlsqlserver-2022
參考資料: CIS Microsoft SQL Server 2022 Benchmark v1.3.0 - 3.2 Ensure CONNECT permissions on the 'guest' user is Revoked within all SQL Server databases

檢查此主機

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