How to execute system command in MSSQL-vulnerabilities and early warning-the black bar safety net

Assume that a host opening a 1 4 3 3 ports we have bySQL injectionor empty weak password for remote connection Can have what way to add a system administrator user? or perform a system command 1. XPCMDSHELL cmd.exe /c net user aaa bbb /add Everyone knows the way,the biggest benefit is the return...