Re:Reading privileged memory with a side-channel
by flukus on Wednesday January 03, 2018 @06:14PM
(#16066390)
And we can't even read TFA with javascript disabled, you have to be less secure just to read the google security blog.
Edit - mixing it up with this other article (https://security.googleblog.com/2018/01/todays-cpu-vulnerabi...)
> In addition to violating process isolation boundaries using native code, Spectre attacks can also be used to violate browser sandboxing, by mounting them via portable JavaScript code. We wrote a JavaScript program that successfully reads data from the address space of the browser process running it.
(granted I think site isolation, if enabled, mitigates crossing domain boundaries)
It goes on to show a sample JS impl that JITs into the expected insns using V8.