{keyword}' Union All Select Null,null,null,null,null,null,null,null - From Msysaccessobjects-- Udhz
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].
Sources:[1] microsoft.com[2] portswigger.net[3] geeksforgeeks.org[4] sqlinjection.net[5] owasp.org[6] owasp.org
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
Are you working on or just curious about how these injection patterns work?
Breaks out of the intended data field in a SQL query. Attackers use NULL to figure out how many
This is the gold standard. It treats user input as literal text, not executable code [6].
Appends a new set of results to the original query [2, 5]. This is the gold standard
Comments out the rest of the original query so it doesn't cause a syntax error [1, 5]. How to Prevent It:
