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First, specify the name of the trigger after the CREATE TRIGGER keywords. However, you can only create an INSTEAD OF trigger on a view. Second, insert a row with an invalid email into the leads table. SQLite Data Types · SQLite Date & Time · SQLite Create Table · SQLite Primary Key · SQLite Foreign Key · SQLite.

A customer asked that we check out his intranet site, which was used by the company’s employees and customers. This was part of a larger security review, and though we’d not actually used SQL injection to penetrate a network before, we were pretty familiar with the general concepts. We were completely successful in this engagement, and wanted to recount the steps taken as an illustration. If the application is creating SQL strings naively on the fly and then running them, it’s straightforward to create some real surprises.

We’ll note that this was a somewhat winding road with more than one wrong turn, and others with more experience will certainly have different — and better — approaches. But the fact that we were successful does suggest that we were not entirely misguided. There have been other papers on SQL injection, including some that are much more detailed, but this one shows the rationale of discovery as much as the process of exploitation.

This appeared to be an entirely custom application, and we had no prior knowledge of the application nor access to the source code: this was a “blind” attack. NET, and this suggested that the database was Microsoft’s SQL server: we believe that these techniques can apply to nearly any web application backed by any SQL server. The login page had a traditional username-and-password form, but also an email-me-my-password link; the latter proved to be the downfall of the whole system.

When entering an email address, the system presumably looked in the user database for that email address, and mailed something to that address. Since my email address is not found, it wasn’t going to send me anything. So the first test in any SQL-ish form is to enter a single quote as part of the data: the intention is to see if they construct an SQL string literally without sanitizing.