CompTIA PenTest+ Practice Test

Which method is commonly used to identify SQL injection vulnerabilities by submitting a single character?

1. Null Byte Injection

2. Single Quote Method

3. Parameter Pollution

4. Command Injection

The correct answer is: Single Quote Method

The method commonly used to identify SQL injection vulnerabilities by submitting a single character is the Single Quote Method. This technique involves taking advantage of improper input validation in SQL queries. By placing a single quote (') in the input, the attacker tests whether the application properly handles or escapes the character. If the application returns an error related to SQL syntax, it indicates that the input is being directly inserted into a SQL statement without adequate filtering. This vulnerability can be exploited to manipulate the queries and potentially access or modify database information. The other options represent different vulnerabilities or techniques. Null Byte Injection is used mainly to bypass security controls in applications that don't handle null bytes properly. Parameter Pollution refers to manipulating query parameters to alter the behavior of an application, but it doesn't specifically involve the use of a single character for testing SQL injection. Command Injection entails executing arbitrary commands on the host operating system rather than targeting SQL queries. Thus, the Single Quote Method specifically targets SQL injection vulnerabilities by testing how the application processes input that includes a single quote character.