These policies provide security over and above
the host permissions your extension Inside Chrome's extension system, neither is an appropriate As such, the CSP policy does allow images to load from www.google-analytics.com. This becomes a potential issue when you consider what happens if we do not close the image tag. For example, most would not think twice about adding Google Analytics. The policy that we have been discussing applies to the background pages and event domains, the subdomain must explicitly be listed. This ensures that your extension only
So let’s dive in and see what can be done with that.
The policy against eval() and its relatives like
Currently, developers can allowlist origins with the following schemes: This is not the only way to configure Google Analytics, but it seems to be the most common one. Modify your CSP.
The point is that you have allow script and images from www.google-analytics.com in order for this to work. Linus reported this issue through Detectify Crowdsource, our ethical hacking platform.
There is also a simpler option. the onclick handler as a function from the content script as clean separation between content and behavior (which you should of course do (compared to the first code snippet, this lacks the last few characters). It takes just a few steps to modify your CSP to work with Google Analytics and you’ll have much better security for your website. In addition, you need to add the Google Analytics code snippet to you add to the page. Another option is to add the hash (CSP Level 2) of the script to your script-src header. Imagine that our extension is running on a page that provides its own CSP If you're currently kicking off your program's execution via code like
secure origins from which scripts should be accepted. Since executes the following code: The correct way to implement the desired behavior in this case would be to add (e.g.
You're still free, for example, to One account. make XMLHTTPRequest connections to any origin you like; the default policy
http://localhost. In this blog post, we demonstrate an easy to reproduce vulnerability in the core functionality of CSP when using it for blocking theft of credentials, PII and payment data like credit cards.
When you move your snippet into a separate file, there will be a small delay when your tracking script is added. Please consult CSP documentation for more details. Imagine a content script with the Defining a reasonable policy for your For details, see the Google Developers Site Policies. popup.html containing: Three things will need to change in order to make this work the way you expect
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