: The database executes: SELECT col1, col2, col3, col4, col5, col6 FROM products WHERE name = '' UNION ALL SELECT NULL,NULL,NULL,NULL,NULL,NULL--' .
This is likely a or "signature" used by an automated vulnerability scanner (such as Burp Suite, SQLmap, or Acunetix).
This is the "probe" part of the injection. The attacker is trying to determine the number of columns being returned by the original database query. : The database executes: SELECT col1, col2, col3,
: The database returns a row of empty data. The attacker now knows the table has 6 columns and can proceed to more dangerous injections, such as UNION SELECT username, password, NULL... to steal sensitive information.
This string is a classic example of a used by security researchers and attackers to probe a website's database for vulnerabilities. The attacker is trying to determine the number
: A website takes user input and places it directly into a SQL query without "cleaning" it first.
Scanners append strings like GoJB so that the security researcher can search the website's logs or the page's source code later to confirm that their input was successfully processed and reflected by the server. Summary of the Attack Flow to steal sensitive information
If the page loads normally, the attacker knows the database is expecting 6 columns.