You find a web application that uses the following query structure to authenticate users: “SELECT * FROM userstable WHERE username 5 ‘userinput1’ and password5

‘userinput2’;” You replace userinput1 with ‘OR 151’; which gives you access to the database without having to enter a user name or password, as “151” is always true and the rest of the query is ignored. What computer fraud and abuse technique is this?

a. SQL injection

b. URL hijacking attack

c. Buffer overflow attack

d. Zero-day attack

e. Web page spoofing