Java Broken Authentication Guide: Examples and Prevention

Authentication is a critical component for safeguarding resources within applications, yet improper implementation can lead to security vulnerabilities known as broken authentication. This occurs when attackers bypass authentication processes, potentially accessing sensitive data or systems without valid credentials. Common vulnerabilities include using weak passwords, lack of brute-force protection, and storing passwords in clear text. Exploitation methods such as brute-force attacks, password spraying, and response manipulation are prevalent. Specific coding practices in Java, such as failing to hash passwords or lacking session management, contribute to these risks. Preventive measures include enforcing strict password policies, implementing multi-factor authentication, and using rate limiting to mitigate brute-force attempts. Addressing these vulnerabilities is essential to prevent unauthorized access and protect organizational data from potential breaches.