Content Security Policy (CSP) in Cybersecurity - Cheat Sheet & Quick Revision

Recall & Review

beginner

What is Content Security Policy (CSP)?

Content Security Policy (CSP) is a security feature that helps prevent attacks like cross-site scripting (XSS) by controlling which resources a web page can load and execute.

beginner

How does CSP improve website security?

CSP restricts the sources of scripts, styles, images, and other content, so only trusted sources are allowed. This reduces the chance of malicious code running on the site.

intermediate

What is a 'directive' in CSP?

A directive is a rule in CSP that specifies what types of content can be loaded and from where. For example, 'script-src' controls which scripts can run.

beginner

What happens if a resource violates the CSP rules?

The browser blocks the resource from loading or running, protecting the user from potential attacks like malicious scripts.

intermediate

Name two common CSP directives and their purpose.

1. script-src: Controls which JavaScript sources are allowed.<br>2. img-src: Controls which image sources are allowed.

What is the main purpose of Content Security Policy (CSP)?

A To control which resources a web page can load and execute

B To speed up website loading times

C To encrypt user data on websites

D To manage user passwords securely

CSP helps improve security by controlling which resources can be loaded and run on a web page.

Which CSP directive controls which JavaScript files can run on a page?

A style-src

B img-src

C script-src

D connect-src

'script-src' directive specifies allowed sources for JavaScript.

If a script tries to load from an untrusted source not allowed by CSP, what happens?

A The script loads normally

B The browser blocks the script from running

C The browser asks the user for permission

D The script runs but with limited access

CSP blocks resources that violate its rules to protect users.

Which of these is NOT a benefit of using CSP?

A Preventing cross-site scripting attacks

B Reducing the risk of data injection

C Controlling resource loading sources

D Automatically fixing website bugs

CSP improves security but does not fix bugs automatically.

How is CSP usually delivered to the browser?

A Via HTTP response headers

B Through a special HTML tag

C By JavaScript code on the page

D Through browser extensions

CSP is commonly sent as HTTP headers from the server to the browser.

Explain what Content Security Policy (CSP) is and why it is important for web security.

Think about how websites can block harmful scripts.

Describe how CSP directives work and give examples of at least two directives.

Directives tell the browser what is allowed.