SQL Injection Prevention

Identify Vulnerable SQL Code

Review a sample SQL query that concatenates user input and identify the injection vulnerability.

Expected output: A description of the vulnerability and how it can be exploited.

Hint: Look for string concatenation involving user inputs.

Rewrite Query Using Parameterized Statements

Convert a vulnerable SQL query into a safe parameterized query.

Expected output: A secure SQL query that prevents injection.

Hint: Use placeholders and pass user inputs as parameters.

SQL injection is a security vulnerability where attackers insert malicious SQL code into input fields to manipulate database queries, potentially leading to unauthorized data access or corruption.

Parameterized queries separate SQL code from user input by using placeholders, ensuring inputs are treated as data only, which prevents attackers from injecting executable SQL code.

Input validation ensures that user inputs conform to expected formats and types, reducing the chance that malicious input can alter SQL commands.