<Eric Rescorla>
Hmm.... Please describe the attack you have in mind. Note that content scripts
actually can talk to arbitrary local LAN addresses, they just can't read the
response. And WebRTC incorporates a consent check before it lets you send
application-controlled data somewhere. So, what is it specifically you think that
WebRTC lets you do?
<Xidorn Quan> No, it doesn't ask anything before it provides the IP addresses to the content script.
<Eric Rescorla> It provides the machine's local address, but not any addresses of other
machines on the LAN. Again, I'd encourage you to describe the attack you are concerned about.
Is it merely disclosure of the local IP addresses of the machine, or something
else?
As I said in comment #2, Firefox is conformant to the RTCWEB specification,
so you should raise this issue on the IETF RTCWEB mailing list:
https://www.ietf.org/mailman/listinfo/rtcweb'I (and others) do appreciate that this has negative impacts if you are
trying to hide your IP address and if you have a proposal for how Firefox
can determine that people want that and suppress WebRTC, that's something
we could look at.
Jesup, I propose we close this with WONTFIX.