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This article mainly introduces the meaning of sql injection, has a certain reference value, interested friends can refer to, I hope you can learn a lot after reading this article, the following let the editor take you to understand it.

Sql injection can generally be entered directly through a web form. Sql injection means that web applications do not judge or filter the validity of user input data, and attackers can add additional sql statements to achieve illegal operations.

SQL injection means that web applications do not judge or filter laxly the validity of user input data. Attackers can add additional SQL statements to the end of query statements defined in advance in web applications and implement illegal operations without the administrator's knowledge, so as to deceive the database server into executing unauthorized arbitrary queries and further get the corresponding data information.

Features:

1. Extensiveness

Any database based on SQL language may be attacked. Many developers write Web applications without normative verification and detection of values received from input parameters, Web forms, cookie, etc., and there are usually SQL injection vulnerabilities.

2. Concealment

SQL injection statements are generally embedded in ordinary HTTP requests, so it is difficult to distinguish them from normal statements, so many firewalls can not recognize the warning, and there are so many variants of SQL injection that attackers can adjust the parameters of the attack, so the effect of using traditional methods to defend SQL injection is not ideal.

3. Great harm

The attacker obtains the database name, table name and field name of the server through SQL injection, thus obtaining the data in the whole server, which is a great threat to the data security of website users. Attackers can also obtain the password of the background administrator through the obtained data, and then maliciously tamper with the web page. This not only poses a serious threat to the database information security, but also has a great impact on the security of the whole database system.

4. Easy to operate

There are many SQL injection tools on the Internet, which are easy to learn, simple to attack, and can be easily used without professional knowledge.

Thank you for reading this article carefully. I hope the article "what does sql injection mean?" shared by the editor is helpful to everyone. At the same time, I also hope that you will support us and pay attention to the industry information channel. More related knowledge is waiting for you to learn!

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