10 Days Of Cybersecurity-4

Day 4: Introduction to Web Application Security

Welcome to Day 4 of our 10-day cybersecurity challenge! Today, we'll explore web application security, covering web technologies and common vulnerabilities. We'll also demonstrate Cross-Site Scripting (XSS) on a vulnerable site.

Basics of Web Technologies

• HTTP: The protocol for transferring data on the web.

• HTML: The language for creating web pages.

• JavaScript: Used for making web pages interactive.

Common Vulnerabilities (OWASP Top 10):

1. Injection: Injecting malicious code, like SQL injection.

2. Broken Authentication: Flaws in authentication.

3. Sensitive Data Exposure: Exposing sensitive data.

4. XML External Entities (XXE): Attacking through XML.

5. Broken Access Control: Exploiting access control flaws.

6. Security Misconfiguration: Misconfigured settings.

7. Cross-Site Scripting (XSS): Injecting malicious scripts.

8. Insecure Deserialization: Exploiting deserialization.

9. Using Vulnerable Components: Using known vulnerable components.

10. Insufficient Logging & Monitoring: Lack of logging and monitoring.

Demonstration: Cross-Site Scripting (XSS)

Use the XSS Game by Google for demonstration.

1. Identify a Vulnerable Input Field:

   • Go to the XSS Game Level 1.

2. Inject a Malicious Script:

   e.g:

   • <script>alert('XSS');</script>

3. Observe the Result:

   • An alert box should appear, indicating a successful XSS attack.

Conclusion

We covered web basics, common vulnerabilities, and demonstrated XSS. Practice these concepts and understand how to secure web applications. Tomorrow, we’ll dive into reconnaissance techniques. Stay safe and happy hacking!