Title: What are CSPs? and How to Use it For You. Get More Information from our site @iwanrj.com free.
When you already have a website, of course you will think about how to increase security on the website. Do not let the data on the website be taken and misused by hackers. In this guide, you will learn one way to increase website security. You will learn how to prevent XSS attacks by providing CSP features on websites through cPanel hosting.
What is Content Security Policy?
Content Security Policy (CSP) is a feature that aims to increase the security of a website. CSP features can prevent your website from XSS attacks or other code injection attacks. Usually hackers carry out XSS attacks by entering scripts into websites. These attacks are used for everything from data theft to destruction of websites to distribution of malware.
CSPs are designed to be fully backwards compatible (except CSP version 2 where there were some inconsistencies explicitly mentioned in backwards compatibility). Browsers that don’t support it still work with servers that do implement it, and vice versa. Browsers that don’t support CSP ignore it, work as usual, defaulting to the standard same-origin policy for web content. If a site doesn’t offer a CSP header, the browser will also use the default same-origin policy.
To enable CSP, you need to configure your web server to return the CSP HTTP header. (Occasionally you may see mention of the header
X-Content-Security-Policybut it’s an old version and you don’t need to specify it anymore).
Alternatively,elements can be used to configure policies, for example:
<meta http-equiv="Content-Security-Policy" content="default-src 'self'; img-src https://*; child-src 'none';" />
Notes : Some features, such as submitting CSP violation reports, are only available when using HTTP headers.
The following are some of the CSP threats, namely:
1. Reducing cross site scripts
The main goal of CSP is to mitigate and report XSS attacks. XSS attacks exploit the browser’s trust in content received from the server. Malicious scripts are executed by the victim’s browser because the browser trusts the source of the content, even if it does not originate from it.
CSP allows server administrators to reduce or eliminate the vectors in which XSS can occur by specifying a domain that the browser should consider a valid source of executable scripts. CSP-compatible browsers will then only run scripts contained in source files received from that whitelisted domain, ignoring all other scripts (including inline scripts and event handler HTML attributes).
As the highest form of protection, sites that do not wish to allow scripts to be executed can choose to disallow script execution globally.
2. Reduce packet sniffing attacks
In addition to limiting the domain from which content can be loaded, the server can determine which protocols are allowed to be used; for example (and ideally, from a security perspective), the server could specify that all content should be loaded using HTTPS. A complete data transmission security strategy includes not only implementing HTTPS for data transfer, but also marking all cookies with the secure attribute and providing automatic redirection from HTTP pages to their HTTPS counterparts. Sites can also use the Strict-Transport-Security HTTP header to ensure that browsers connect only through encrypted channels.
How to Use CSPs
Configuring Content Security Policy involves adding a Content Security Policy HTTP header to a web page and assigning it a value to control what resources user agents are allowed to load for that page. For example, a page that uploads and displays an image could allow images from anywhere, but limit form actions to a specific endpoint. A well-designed Content Security Policy helps protect pages from cross-site scripting attacks. This article explains how to properly create such a header, and provides examples.
1. Define your policy
You can use the Content Security Policy HTTP header to define your policy, like this :
Policy is a string that contains policy directives that describe your Content Security Policy.
2. Write a policy
Policies are described using a series of policy directives, each of which describes policies for a specific type of resource or policy area. Your policy should include a default-src policy directive, which is a fallback for other types of resources when they don’t have their own policies (for a full list, see the default-src directive description). The policy should include a default-src or script-src directive to prevent inline scripts from running, as well as block usage
eval(). A policy needs to include a default-src or script-src directive to restrict inline styling of