GATE (Graduate Aptitude Test in Engineering) Computer Science & IT (CS) Databases-Query Languages Study Material (Page 10 of 11)

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SQL Injection

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SQL Injection

A SQL injection attack consists of insertion or “injection” of a SQL query via the input data from the client to the application. A successful SQL injection exploit can read sensitive data from the database, modify database data (Insert/Update/Delete) , execute administration operations on the database such as shutdown the DBMS, and recover the content of a given file present on the DBMS file system and in some cases issue com…

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SQL Injection: SQL in Web Pages

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SQL in Web Pages

SQL injection usually occurs when we ask a user for input, like their username/use rid, and instead of a name/id, the user gives us an SQL statement that you will unknowingly run on your database.

txtUserId = getRequestString ( “UserId) ;

txtSQL = “SELECT ⚹ FROM Users WHERE UserId =” + txtUserId;

It creates a SELECT statement by adding a variab…

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