These can often detect and block common patterns like UNION ALL SELECT before they reach your server.
The best way to stop these attacks is to never "glue" user input directly into your database queries. Instead, use: These can often detect and block common patterns
It looks like you’ve included a SQL injection payload in your request. This specific string is designed to test for vulnerabilities in a database by attempting to "union" (combine) your query results with data from a system table—in this case, MSysAccessObjects , which is specific to [1, 2, 4]. This specific string is designed to test for
This is the gold standard. It treats user input as literal text, not executable code [6]. If you are looking to learn about this
If you are looking to learn about this for security research or to protect your own applications, here is a quick guide on what’s happening and how to prevent it. What this payload does:
Matches the number of columns in the original table. Attackers use NULL to figure out how many columns they need to match without causing a data type error [2, 3].
A system table in Access that contains information about database objects. If successful, the attacker can see if they have access to system metadata [1, 4].