If the page loads normally, the attacker knows the database is expecting 6 columns.
This string is a classic example of a used by security researchers and attackers to probe a website's database for vulnerabilities. If the page loads normally, the attacker knows
This represents the original search term or input value that a legitimate user would enter. In an attack scenario, the "payload" (the rest of the string) is appended to this keyword to trick the database into executing an additional command alongside the intended query. 2. UNION ALL In an attack scenario, the "payload" (the rest
: Any code that was supposed to follow the input (like a closing quote or a WHERE clause) is ignored by the database, preventing syntax errors that would break the injection. 5. GoJB 4. -- (The Comment) In SQL
Developers should use Parameterized Queries (Prepared Statements), which treat user input as literal data rather than executable code.
If the page returns an error (like "The used SELECT statements have a different number of columns"), the attacker will try again with five or seven NULL values until the error disappears. 4. -- (The Comment) In SQL, double-dashes signify the start of a comment.
: The database executes: SELECT col1, col2, col3, col4, col5, col6 FROM products WHERE name = '' UNION ALL SELECT NULL,NULL,NULL,NULL,NULL,NULL--' .