A classification of SQL injection attacking vector as of 2010. SQL injection must exploit a security vulnerability in an application’s software, for example, when user input is either incorrectly filtered for string literal escape characters embedded in SQL statements or user input is sql injection pdf book strongly typed and unexpectedly executed.
SQL injection is mostly known as an attack vector for websites but can be used to attack any type of SQL database. In a 2012 study, it was observed that the average web application received 4 attack campaigns per month, and retailers received twice as many attacks as other industries.
1998 article in Phrack Magazine. 10 web application vulnerabilities of 2007 and 2010 by the Open Web Application Security Project. In 2013, SQLI was rated the number one attack on the OWASP top ten. The Storm Worm is one representation of Compounded SQLI.
This classification represents the state of SQLI, respecting its evolution until 2010—further refinement is underway. This form of SQL injection occurs when user input is not filtered for escape characters and is then passed into an SQL statement. This results in the potential manipulation of the statements performed on the database by the end-user of the application.
This SQL code is designed to pull up the records of the specified username from its table of users. This prevents attackers from injecting entirely separate queries, but doesn’t stop them from modifying queries. This form of SQL injection occurs when a user-supplied field is not strongly typed or is not checked for type constraints.