This document discusses in detail the common "SQL injection" technique, as it applies to the popular Microsoft Internet Information Server/Active Server Pages/SQL Server platform. It discusses the various ways in which SQL can be "injected" into the application and addresses some of the data validation and database lockdown issues that are related to this class of attack.

The paper is intended to be read by both developers of Web applications which communicate with databases and by security professionals whose role includes auditing these Web applications.

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