If you're performing a penetration test or higher-level security audit of your SQL Server systems, there's one test you must not miss. It seems obvious, but many people overlook it: SQL Server password testing. Given the inherent weaknesses compared with more secure Windows authentication, you should especially test for password flaws if you're using SQL Server authentication in mixed mode. Password testing will help you determine how easily others can break into your database and help you ensure SQL Server users are being responsible with their accounts.