So far, we have identified and exploited a common SQL injection vulnerability, where the requested information is displayed in the server's response. There is a different type of SQL injection, however, where the server responses don't reveal the actual detailed information, irrespective of whether or not it exists. This is called blind SQL injection.
To detect a blind SQL injection, you need to form queries that get yes or no responses. This means that a query responds in a consistent way when the result is either positive or negative so that you can distinguish one from the other. This can be based on the response's contents, the response code, or the execution of certain injected commands. Within this last category, ...
