In Blind SQLi, data is not retrieved by the web application, so the attacker cannot view the results of an attack using the same communication channel they used to launch this type of attack. Blind SQL Injection, also commonly referred to as the Inferential method, is of several types: Content-based SQLiĬontent/Boolean-based SQLi attacks force the web application to return different results depending on whether the malicious SQL query returns a TRUE or FALSE result. In a Blind SQL injection technique, the hacker sends malicious data payloads, then reconstructs the database server’s structure using the web application’s response. In this case, the malicious payload uses SQL’s UNION operator to combine the results of several SELECT statements to one output, which is returned along with the HTTP response. Sometimes the error messages can provide sufficient data to enumerate the entire database. The attacker relies on error messages relayed by the database server to learn about the database structure. There are several types of in-band SQLi, including: Error-based SQLi This code injection technique is common since it offers a simple, efficient way to access the database server. The attacker gathers their results using the communication channel they use to launch attacks. SQLi attacks are categorized based on the following methods used to gain database access: In-band SQLi SQLi is a common and well-documented attack strategy whose success has far-reaching business consequences such as unauthorized viewing of credentials and gaining administrative access to the application’s database.
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