It didn't solve my problem. A good starting point for the majority of websites could be: This permits styles, images, scripts and Ajax requests from the same origin. posts:12913 I'm having trouble with the Facebook Chat plugin, it doesn't display in Safari, Firefox and Edge. Thanks, but I have tried this, was one of the posts I came across before I posted this. Thanks to Jim Boykin for taking care of our community for the last five years! Click On and specify what can be loaded on your website from where. This cannot be avoided at the time of writing and other third-party vendors will have similar challenges. Content Security Policy is a candidate recommendation of the W3C working group on web application security. The unsafe-inline keyword is available to allow inline code for all or some script sources, but the W3C recommends avoiding it where possible. Moderators: Ocean10000 & phranque, joined:Sept 26, 2001 A script loaded from another domain runs in the context of the current page and can do whatever it likes. More information in our, support all or nearly all Level 2 directives, Know Your Web Application Risks with Netsparker’s Kenna Integration, Insecure Direct Object Reference (IDOR) Vulnerabilities in Brief, Privileged Access Management and Netsparker, Netsparker Named an October 2020 Gartner Peer Insights Customers’ Choice for Application Security Testing, Using Content Security Policy to Secure Web Applications. I appreciate your help. So this is pointing to the facebook page related to the business!?!?! I think it should block in line script and in line styles. If you are running Apache, you just need to add this single line to your .htaccess configuration file: Header set Content-Security-Policy "default-src 'self'" This line will configure your website to only load scripts, images etc. Server configuration files are practical because they apply the same header to all pages within the sub-folder hierarchy. or within the server configuration such as Apache’s .htaccess file, e.g. the default fallback policy. You may end up with a convoluted policy such as: (Line breaks have been added for clarity but must not be used in real code.). Get practical advice to start your career in programming! Otherwise if the header configuration does not match your site's requirements, some resources may not load (or work) properly. Have a question about this project? How easy is it to recognize that a creature is under the Dominate Monster spell? I haven't purposely set a Referrer Policy Header. Then you can specify the hash value in the script-src directive, prefixing it with sha256-, sha384-, or sha512-, depending on the algorithm used. Adding a Content Security Policy Security Header . This is why CSP also blocks all string evaluation functionality by default, including eval(), new Function(), setTimeout([string]), and similar constructs. Keep up with the latest web security content with weekly updates. However, you can also define a policy within the HTML of any page using a meta tag: This may be necessary if you don’t have permission to configure the server or require differing policies on each page. To use this functionality, use the sandbox directive to treat the page as though it was inside a sandboxed iframe. When you set the header from htaccess, the big advantage is that it will can be added to all HTTP responses (even your static assets). The use of inline scripts/css is quite high so, I don't think it's a good idea. How can election winners of states be confirmed, although the remaining uncounted votes are more than the difference in votes? You can then specify the nonce or hash in your script-src directive to allow that piece of inline code. Or is there other ways of setting, like in my .htaccess file? The Principles of Beautiful Web Design, 4th Edition, Learn SQL (using MySQL) in One Day and Learn It Well. www.domain.com, cdn.domain.com, etc. Use the report-uri directive to tell the browser where it should post violation reports in JSON format. It’s less necessary if your site doesn’t use third-party scripts, fonts, media, widgets or analytics but can you be sure it never will? Enter Content Security Policy (CSP) – a standardized set of directives that tell the browser what content sources can be trusted and which should be blocked. How can I make a div not larger than its contents? We use optional third-party analytics cookies to understand how you use GitHub.com so we can build better products. See the Vulnerability Index for a full list of CSP checks available in Netsparker. However, we’ve not defined other types so all stylesheets, images, fonts, etc. Sign up for a free GitHub account to open an issue and contact its maintainers and the community. @adamzr I'll dig into this in the following period, but if you have any other ideas/suggestions, feel free to share them. How can I check this? Before you go live with your CSP directives, you can use the Content-Security-Policy-Report-Only header instead of Content-Security-Policy. And finally, for a practical demonstration of configuring CSP headers, watch this Security Weekly interview with Netsparker security researcher Sven Morgenroth. By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy. This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply. It’s defined using a Content-Security-Policy HTTP header set by a server-side language (PHP, Node.js, Ruby etc.) Check that the domain of the page the plugin is being rendered on has been whitelisted. I think it should block in line script and in line styles. It’s defined using a Content-Security-Policy HTTP header set by a server-side language (PHP, Node.js, Ruby etc.) Terms of Service and Privacy Policy. Because of this, there isn't one most common exampl… Please enable Javascript and press the Reload/Refresh button on your browser. By using this website you agree with our use of cookies to improve its performance and enhance your experience. Apache. Once a policy is live, you can use the same report-uri directive to get detailed reports about policy violations. GitHub is home to over 50 million developers working together to host and review code, manage projects, and build software together. If needed, you can also provide specific directives at page level using HTML meta tags. ): You then realise you’re also loading a third-party library from a CDN which can appear on various sub-domains of mycdn.com. For example, an old-style HTML and JavaScript page might contain script code both in