#29490: Subresource integrity for form assets ---------------------------------------+------------------------ Reporter: Meiyer | Owner: nobody Type: New feature | Status: new Component: Forms | Version: master Severity: Normal | Keywords: Triage Stage: Unreviewed | Has patch: 0 Needs documentation: 0 | Needs tests: 0 Patch needs improvement: 0 | Easy pickings: 0 UI/UX: 0 | ---------------------------------------+------------------------ [https://developer.mozilla.org/en- US/docs/Web/Security/Subresource_Integrity SRI] gives the web site author some guarantees that an external resource (typically, a script), included within the web page, has not been altered. For example, various external libraries are loaded from a CDN or another third-party repository, implicitly trusting that repositories’ security, but these libraries can be modified or tampered with to include malicious code, with the web site author not aware that this malicious code is now running on their web site in the context of their own web application. SRI prevents the loading of such resources if they were modified.
SRI is implemented by the means of the “integrity” attribute on the `<LINK>` and `<SCRIPT>` HTML elements. It is relevant to Django, because the form assets (“Media”) may point to resources on external repositories. But Django does not allow any way to specify the [https://developer.mozilla.org/en- US/docs/Web/Security/Subresource_Integrity#Using_Subresource_Integrity “integrity“ attribute] (and the [https://developer.mozilla.org/en- US/docs/Web/HTML/CORS_settings_attributes “crossorigin” attribute]) for the assets of the forms. I suggest modifying the `Media` [https://docs.djangoproject.com/en/2.0/topics/forms/media/#assets-as-a -static-definition class definitions] such that the assets are not a simple list but a `dict` (with keys such as `src`, `integrity`, `crossorigin`), resulting in corresponding HTML elements being rendered appropriately. There can be a fallback to the simpler case when a `list` or `tuple` is provided, for backwards-compatibility. -- Ticket URL: <https://code.djangoproject.com/ticket/29490> Django <https://code.djangoproject.com/> The Web framework for perfectionists with deadlines. -- You received this message because you are subscribed to the Google Groups "Django updates" group. To unsubscribe from this group and stop receiving emails from it, send an email to django-updates+unsubscr...@googlegroups.com. To post to this group, send email to django-updates@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/django-updates/052.4acd3484d842e90614b0fd421f3f1fa6%40djangoproject.com. For more options, visit https://groups.google.com/d/optout.