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I'm trying to set a Content-Security-Policy header for an html file I'm serving via s3/cloudfront. I'm using the web-based AWS console. Whenever I try to add the header:
it doesn't seem to respect it. What can I do to make sure this header is served?
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Create a custom response headers policy from AWS consoleFrom the navigation menu, choose Policies. Then, choose Response headers. Choose Create response headers policy. Under Security headers, select each of the security headers that you want to add to the policy.
To add this custom meta tag, you can go to www.yourStore.com/Admin/Setting/GeneralCommon and find Custom <head> tag and add this as shown in the image below. Content Security Policy protects against Cross Site Scripting (XSS) and other forms of attacks such as ClickJacking.
Content-Security-Policy is the name of a HTTP response header that modern browsers use to enhance the security of the document (or web page). The Content-Security-Policy header allows you to restrict how resources such as JavaScript, CSS, or pretty much anything that the browser loads.
I'm having the same problem (using S3/CloudFront) and it appears there is currently no way to set this up easily.
S3 has a whitelist of the headers permitted, and Content-Security-Policy is not on it. Whilst it is true you can use the prefixed x-amz-meta-Content-Security-Policy, this is unhelpful as there is no browser support for it.
There are two options I can see.
1) you can serve the html content from a webserver on an EC2 instance and set that up as another CloudFront origin. Not really a great solution.
2) include the CSP as a meta tag within your html document:
<!doctype html>
<html>
<head>
<meta http-equiv="Content-Security-Policy" content="default-src http://*.foobar.com 'self'">
...
This option is not as widely supported by browsers, but it appears to work with both Webkit and Firefox, so the current Chrome, Firefox, Safari (and IOS 7 Safari) seem to support it.
I chose 2 as it was the simpler/cheaper/faster solution and I hope AWS will add the CSP header in the future.
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