Question 1

How to implement CSP headers in a web application?

Accepted Answer

Implement CSP via HTTP headers like `Content-Security-Policy` or meta tags. Start with report-only mode to monitor violations before enforcement, and use tools like CSP evaluators to test configurations against your site's resources.

Question 2

What's the difference between CSP and CORS?

Accepted Answer

CSP controls which resources can load on a page to prevent attacks like XSS, while CORS manages cross-origin requests for APIs. CSP is about content sources, whereas CORS deals with cross-origin data sharing and permissions.

Question 3

How to allow inline scripts with CSP without using 'unsafe-inline'?

Accepted Answer

Avoid 'unsafe-inline' by using hashes or nonces. Generate a unique nonce per request and include it in the CSP header and script tags, or compute SHA hashes of inline script content and specify them in the policy.

Question 4

Best practices for CSP in single-page applications?

Accepted Answer

For SPAs, use strict policies for scripts and styles, leverage nonces for dynamic content, and allowlist all third-party dependencies. Closely monitor violation reports during development and deployment to catch misconfigurations early.

Question 5

CSP vs Subresource Integrity: which should I use?

Accepted Answer

Use both for layered security. CSP restricts resource origins to prevent unauthorized loading, while SRI ensures integrity by verifying hashes to prevent tampering. They complement each other, with CSP being broader in scope.

Question 6

How to handle CSP violation reports effectively?

Accepted Answer

Set up a secure endpoint to collect reports, filter noise from browser extensions, and regularly review logs to identify misconfigurations or attacks. Services like Report-URI can automate analysis and alerting for better management.

Any protection against dynamic module import?

What is Any protection against dynamic module import??

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