: The attacker uses NULL values to match the number of columns in the original query without causing a data type error.
: Ensure the database user account used by your application has the minimum permissions necessary. For instance, it shouldn't be able to drop tables or access system schemas. : The attacker uses NULL values to match
: Implement strict allow-lists for user input. For example, if a field expects a number, reject any input containing characters like ' , - , or UNION . if a field expects a number
If you are developing an application and seeing these strings in your logs, your system may be under a security scan. To prevent these attacks, follow these industry standards: follow these industry standards: