: This is the "fingerprint." The attacker concatenates specific random strings. If the web page then displays "qbqvqCPVNpZTzSGrDPCuUjMEwGUrDiXdBUrIytTqtktxYqqbqq" on the screen, the attacker knows the site is vulnerable to SQL injection.
: This is a dummy value intended to make the original query return no results (by targeting a non-existent ID), allowing the results of the second query to take over the output. : This is the "fingerprint
: These are placeholders used to match the number of columns in the original database table. : This is the "fingerprint
Are you seeing this in your , or are you currently testing an application for security holes? : This is the "fingerprint
: This command combines the results of the original query with a new, custom query.