Protection Against Common Attacks

Node.js applications can be vulnerable to various common attacks, such as SQL Injection, Cross-Site Scripting (XSS), Cross-Site Request Forgery (CSRF), and brute force attacks. In this topic, we will discuss these threats and how to mitigate the associated risks.

SQL Injection

SQL injection occurs when an attacker inserts or manipulates SQL queries through user input. This can result in unauthorized access to the database, data extraction, or destruction of the database.

Vulnerability Example

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Mitigation

To prevent SQL injection, use parameterized queries or ORM like Sequelize.

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Cross-Site Scripting (XSS)

XSS allows an attacker to inject malicious scripts into a web application viewed by other users. This can lead to session hijacking, site defacement, or redirection to malicious sites.

Vulnerability Example

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Mitigation

Use escape libraries to sanitize input and output, such as xss or sanitize-html.

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Cross-Site Request Forgery (CSRF)

CSRF is an attack that forces a user's authenticated browser to perform unwanted actions on a web application in which they are authenticated.

Mitigation

Use CSRF tokens and verify these tokens in POST requests. The csurf package is useful for this.

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Brute Force Attacks

Brute force attacks involve trying many passwords or keys until finding the correct one.

Mitigation

Implement rate limits and use tools like express-rate-limit.

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Conclusion

Protecting your Node.js application from these common attacks is crucial for the security of your users and data. Use appropriate mitigation techniques and regularly review your code to ensure you are following best practices. In the next topic, we will explore best practices for data handling in your application.