Open terjanq opened 9 months ago
Thanks for contributing. The main maintainer of this project is temporary unavailable, but we'll definitely get back to this. The plan is to tighten some limitations on DOM usage that Snow already introduces and fixing the missing overrides where possible. Some of the work has started (see PR tab)
Meanwhile we're also working with W3C to propose a basic building block of Snow getting introduced into the browser so that all of the monkey-patching can be eliminated in the future. https://www.w3.org/2023/03/secure-the-web-forward/talks/realms.html
Feel free to update this issue with comments on how you think it should be addressed. We may reach out with questions later.
It is possible to enable access to
opener
in various ways, e.g. opening two popups and usingopener
attribute on snow to perform the following:The above attack could be mitigated by banning
opener
property from the window object, however, it's possible to use an opener on a cross-origin iframe. The following PoC achieves just that with some other trickery to establish openee-opener relationship. Seems to be working in both Chrome and Firefox.