The Content Security Policy (CSP) Header is a security measure to prevent Cross-Site Scripting (XSS), clickjacking, and other code injection attacks by specifying allowed sources of content for a web page. When implemented, the web server sends an HTTP response header with a policy to the browser, …The Content Security Policy (CSP) Header is a security measure to prevent Cross-Site Scripting (XSS), clickjacking, and other code injection attacks by specifying allowed sources of content for a web page. When implemented, the web server sends an HTTP response header with a policy to the browser, which enforces it. The policy dictates authorized sources for resources like images, scripts, and styles, helping prevent various attacks by limiting where these resources can be loaded from. If an attacker tries to inject malicious content from an unauthorized source, the browser will not load it, protecting the user from potential security threats.
Complete Guide on Content Security Policy Header
What is Content Security Policy Header? The Content Security Policy Header (CSP) is a crucial security feature used in web development to safeguard against Cross-Site Scripting (XSS), Injection attacks, and other code injection attacks. Why is it Important? It is important because it defines the approved source list of all the resources to prevent malicious activities. This list allows only listed sources to load the resources, thereby protecting from risk associated web attacks. How Does It Work? CSP works by sending HTTP headers ('Content-Security-Policy') from the server to control resources the browser is allowed to load for the page. If policies are violated, it gets blocked and a violation report gets generated. Exam Tips: Answering Questions on Content Security Policy Header 1. Understand what it is and why it's used. Memorize the role of CSP in preventing web attacks. 2. Know how CSP works, especially its relationship with HTTP headers and the concept of an approved source list. 3. Familiarize yourself with violation reports. 4. Practice explaining it in simple terms, as well as discussing its importance and function in depth. Be able to give examples of how it can be implemented and managed.
CompTIA Security+ - Content Security Policy Header Example Questions
Test your knowledge of Content Security Policy Header
Question 1
You are helping a company improve their website's security. You need to restrict the domains that the website can load scripts from. Which Content Security Policy header directive should you use?
Question 2
A web application has a vulnerability that allows attackers to inject scripts. Which Content Security Policy header directive should be used to mitigate the risk of script injection attacks?
Question 3
A website uses Content Security Policy and needs to allow an external domain to load images on the site while maintaining security. Which directive and value should be used?
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