If I have a single page application index.html and wish to set the CSP header, can I get away with only sending it on the index.html page header or do i have to set it in the header of every js/htm file etc.
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If I'm loading another site in an iFrame do the Content Security Policy Headers of that site have any affect on whether the site gets blocked?
e.g. if I open www.google.com in an iFrame is there any interaction between the CSP header settings on my site and the ones on google.com? Or would Google's CSP only affect what they're trying to load in the iFrame.
Of course if google had their own iFrames they'd need CSP headers to allow any 3rd party content to load. But do my CSP headers have any affect on Google's after google.com starts to load? If Google tried to load youtube.com in an iFrame and I didn't include youtube.com in my CSP whitelist would that work?
Sorry if this is a silly question, I'm trying to wrap my head around iFrames. What I'm wondering is if I need to worry about the CSP settings on the third party, especially if I'm nesting iFrames, or if I only need to worry about my CSP policy.
I think what I'm getting at is this: Once I've said "allow this 3rd party site to load" in my CSP headers can that site load whatever it wants based on their CSP headers?
Thanks!
Let's say that you have site A framing site B. Site A must not set a framing policy that denies site B and site B must not set a policy that prevents being framed by A.
Site A can set "frame-src B" to explicitly allow site B to be framed. If frame-src is not set, child-src is used as a fallback, and if that is not set, default-src is used as a fallback. If none of them are restricted, all sites can be framed.
Site B can set "frame-ancestors A" to allow framing by A. This directive has no fallback. If it is not set, any site can frame site B. If it is set, only the sites listed as valid sources can frame it.
Apart for frame-src (child-src, default-src) for the framer and frame-ancestors for the framed, there is no impact on other sites by the CSP, they each control their own sources.
CSP Header directive corresponding to iframes ,
frame-src
frame-ancestors
lets say your site xyz.com and google's site "google.com".
Site xyz.com has its own csp which can controls,
Who can load xyz.com as iframe, decided by frame-ancestors directive
Who can be loaded inside 'xyz.com' as iframe, decided by frame-src directive
same scenario applies for google.com ( whose csp can decide, whom to be loaded as iframe inside its app & whom can load google.com as iframe )
Each html document has its own csp response header, which will not interfere with its host app (parent frame) or its iframes (child frames).
xyz.com 's CSP only decides whom should load it & whom it should load as frame, it cannot control its host frame or child frame ( they are considered as separate entities )
Apart from this another header X-FRAME-OPTIONS is also available with minimal control options to decide whether a site should load as frame or not.
For detailed reference :
CSP - https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Content-Security-Policy
X-FRAME-OPTIONS - https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/X-Frame-Options
I get a Content Security Policy violation report in my browser when I visit my webpage:
[Report Only] Refused to load the image '' because it violates
the following Content Security Policy directive: "img-src 'self'
".
When I investigate the HTTP response headers, neither the Content-Security-Policy-Report-Only header or the Content-Security-Policy header seems to be set by the origin server.
How can I find the source of this violation report? I'm not sure why it is generated considering the relevant header(s) do not seem to be set.
It's 2 opts possible:
1. You have a third-party iframe embedded into page. Violations you observed belongs to that iframe, it publishes its own CSP header. Since a browser has only one console for main page and all iframes, you can see third-party iframes errors too.
Try to use other browser, some ot these could be more verbosely and show blocked URI. Anyway you can nothing to do with third-party CSP.
2. If you visit nonexistent webpage, server's middleware can publish default CSP for pages with 4xx/5xx status code. Low probability because Report-Only mode in not used in such cases.
Publishing Content-Security-Policy-Report-Only not in HTTP header but in the meta tag is not possible, because metatag is not support Report-Only mode. Therefore I bet on opt 1.
There is the Header X-Frame-Options, which is served by the webserver when you want to forbid (or limit) other sites from embedding your page into theirs, using an iframe.
But, is there a Header which tells the browser: "Don't allow any Iframe to be loaded on this page"?
There are, of course, headers which tell the browser which scripts, from which domain, is it allowed to execute, but I want something more generic: "don't allow any iframe, or only iframes from certain origins, to be loaded on this page".
Content-Security-Policy (CSP) can be used to restrict content on pages, including iframes. Specifically, the frame-src directive. If you set the following HTTP header, no iframes will be allowed on your page.
Content-Security-Policy: frame-src 'none'
If you want to only allow iframes from specific origins you could do the following to allow iframes from example.com, and all subdomains:
Content-Security-Policy: frame-src http://*.example.com
You can also set the CSP policy via meta tag.
Trying to publish HTTPS content (login form) using iframe onto HTTP page.
Have permission, but do not have access to source code of HTTPS page.
Standard attempts to publish iframe do not work with this HTTPS page content.
Appears that HTTPS page x-frame-option set to DENY.
Is there any way to embed/frame/etc. this HTTPS content onto HTTP page despite x-frame objections?
This is a WordPress site. Not sure if that is relevant here.
No there is not, and this actually have nothing to do with HTTP or HTTPS, it's how the X-frame-Options header works.
When a resource returns the header of X-Frame-Options: DENY, it is not possible to show it in any iframe or iframe-like window, not even one on the same site.
You said you have permission though, so perhaps you can get the service you are using to use the ALLOW-FROM option for your service. Something like this could be configured to allow your site to frame it.
X-Frame-Options: ALLOW-FROM https://example.com/
I have a site hosted in IIS 6.0 (I've also tested it with IIS 7.0, same result) and I've configured my page so that it only accepts iframes hosted in the same origin domain using this: http://support.microsoft.com/kb/2694329
I have added the "X-Frame-Options" field name and "SAMEORIGIN" value in the HTTP Headers tab in IIS.
That means "The page can only be displayed in a frame on the same origin as the page itself."
Now my pages can't be hosted in any other website/domain which is fine and expected.
The problem is that I have an https page whose parent is an http page both of which within the same domain. I expected this to work but I get the bellow error:
This content cannot be displayed in a frame
To help protect the security of information you enter into this website, the publisher of this content does not allow it to be displayed in a frame.
What you can try:
Open this content in a new window
How to configure my site or what HTTP Header to add to allow an https page being iframed within an http page?
I also tried using "ALLOW-FROM" header name and adding specifically my domain names:
"http://mydomain.com" and "https://mydomain.com"
but it said
"The custom header already exists in the list".
So does "Origin" refer to both the domain and protocol? if so that seems to be a design issue? Or is there any workaround?
Thanks,