What does sql injection mean?

This article mainly introduces what sql injection means. It has certain reference value. Interested friends can refer to it. I hope you will gain a lot after reading this article. The editor will take everyone to find out together. Sql injection can generally be entered directly through a web form. SQL injection means that the web application does not judge the legality of the data input by the user or the filtering is not strict, and the attacker can add additional SQL statements to achieve illegal operations. SQL injection means that the web application does not judge the legality of user input data or filter it laxly. Add additional SQL statements to implement illegal operations without the administrator’s knowledge, so as to deceive the database server into performing unauthorized arbitrary queries, and further obtain corresponding data information. Features: 1. Extensive Any database based on SQL language may be attacked. Normative validation and detection of values ​​received from input parameters, web forms, cookies, etc., often presents SQL injection vulnerabilities. 2. Concealment SQL injection statements are generally embedded in ordinary HTTP requests, which are difficult to distinguish from normal statements, so many current firewalls cannot recognize and warn, and There are many…