Gojb: {keyword} Union All Select Null,null,null,null,null,null--
: 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
: NULL is used because it is compatible with almost any data type (integers, strings, dates, etc.). : Any code that was supposed to follow
: By using six NULL values, the attacker is testing if the original query has exactly six columns. : By using six NULL values, the attacker
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 Comment) In SQL, double-dashes signify the
Developers should use Parameterized Queries (Prepared Statements), which treat user input as literal data rather than executable code.
Here is a detailed breakdown of what each component of this specific string does: 1. {KEYWORD}
: The database executes: SELECT col1, col2, col3, col4, col5, col6 FROM products WHERE name = '' UNION ALL SELECT NULL,NULL,NULL,NULL,NULL,NULL--' .