Which method is commonly used to exploit network vulnerabilities?

SQL injection is a well-known method used to exploit vulnerabilities in web applications, particularly those that communicate with a database. This technique takes advantage of the application's failure to properly sanitize user inputs, allowing an attacker to insert or manipulate SQL queries. Consequently, they can gain unauthorized access to sensitive data, modify or delete records, and potentially take control of the entire database system.

When an application does not validate or escape the user inputs adequately, an attacker can craft an input that is interpreted as part of a SQL query. This can lead to serious consequences, such as data breaches or corruption. SQL injection attacks are especially problematic for applications that rely heavily on databases, making it crucial for developers to implement strong filtering and sanitization practices.

While other methods like Man-in-the-Middle attacks or Denial of Service attacks are certainly concerning, they operate differently and target different vulnerabilities. Man-in-the-Middle exploits focus on intercepting and tampering with communications between two parties, and Denial of Service aims to overwhelm systems, making them unavailable to legitimate users. Data obfuscation, on the other hand, is a technique used to protect data rather than exploit vulnerabilities.