The Vulnerable Code
The code that is recognized as safe can have flaws in it too. So, let us check vulnerable code by starting by examining a vulnerable piece of Java code:
Java
// Java Program ( Vulnerable ) public List<BankAccount> FindAccountsByCustomerId(String Id) throws SQLException { // not secure String sql = "SELECT customerid, acc_number, balance FROM Accounts WHERE customerid = '" + Id + "'"; Connection c = dataSource.getConnection(); ResultSet rs = c.createStatement().executeQuery(sql); // Code Further } |
In this code snippet, the `Id` input is directly concatenated into the SQL query string, creating a glaring vulnerability.
Understanding and Preventing SQL Injection in Java Applications
In the world of web applications and databases, security is paramount. SQL injection is a common and dangerous vulnerability that can compromise your application’s integrity. In this article, we will delve into the fundamentals of SQL injection, understand how it works, and learn how to protect your Java applications from this menacing threat.