: They use "NULL" to figure out exactly how many columns your database table has without triggering a data-type error.
While this might seem like just a string of code, it’s actually a great jumping-off point for a blog post about and database protection . Beyond the Payload: Understanding SQL Injection and "DJGP"
: This is SQL shorthand to comment out the rest of the legitimate code, ensuring the injected command runs cleanly. The "DJGP" Element {KEYWORD} UNION ALL SELECT NULL,NULL,NULL-- DJGP
Instead of building strings, use prepared statements. This treats input as "data" rather than "executable code."
Seeing {KEYWORD} UNION ALL SELECT in your logs is a reminder that the internet is always "knocking on the door." By using modern coding practices, you make sure that door stays locked. : They use "NULL" to figure out exactly
Tools like Sequelize, Eloquent, or Entity Framework handle much of this protection for you by default. The Bottom Line
: The attacker is trying to append their own results to your original database query. The "DJGP" Element Instead of building strings, use
If you expect a zip code, don't accept a string that starts with UNION .