Someone familiar with databases and SQL will understand that giving an attacker direct access to write a query is going to make you vulnerable, even with zero k

Someone familiar with databases and SQL will understand that giving an attacker direct access to write a query is going to make you vulnerable, even with zero knowledge of how the thing is implemented. A function for retrieving a MAC address does not have the same expectation. Without knowing how it’s inplemented, it’s quite reasonable to expect such a function to behave sanely on arbitrary input.