What technique is often used in dynamic testing to reveal vulnerabilities like SQL injection?

The technique of web application scanning is particularly effective in dynamic testing for revealing vulnerabilities such as SQL injection. This method involves testing the application while it is running, allowing the scanner to interact with the application in real-time and simulate various attack vectors that an actual adversary might use.

Web application scanners can automatically send a variety of malicious inputs to the application's endpoints and analyze the application's responses. When a scanner identifies that an input results in a database query being executed in an unintended manner, or it can manipulate the SQL commands, it highlights a potential SQL injection vulnerability. This type of testing is essential because it assesses the application’s runtime behavior, focusing specifically on how it handles inputs and processes data.

While static analysis and code review focus on examining source code and configuration without executing the program, they may not effectively uncover certain runtime vulnerabilities that web application scanning can identify during real-time interaction. Interface testing, on the other hand, emphasizes validating interactions between different components of the system but does not specifically target security vulnerabilities in the way that web application scanning does. Therefore, web application scanning stands out as the appropriate method for identifying vulnerabilities like SQL injection in a dynamic testing environment.