No one should be installing native apps for this now that we have WebRTC.
Zoom RCE from Pwn2Own 2021
11–20 of 126 posts
Re: Zoom RCE from Pwn2Own 2021
#12No one should be installing native apps for this now that we have WebRTC.
Re: Zoom RCE from Pwn2Own 2021
#13No one should be installing native apps for this now that we have WebRTC.
Unfortunately, Zoom deliberately cripples their web app to the point of being unusable. If your employer uses Zoom, there's no way to avoid the native app.
Re: Zoom RCE from Pwn2Own 2021
#14Earlier quoted context omitted.
WebRTC has had plenty of implementation issues. https://googleprojectzero.blogspot.com/2020/08/exploiting-an...
There's a difference between Android native bugs and forgoing protection provided by browser on desktop instead of relying on Native apps.
Re: Zoom RCE from Pwn2Own 2021
#15I have setup wireshark for troubleshooting. That's about it. What's the role of proxies, modified DNS records etc. in this setup? How can I duplicate this?
Thanks.
Re: Zoom RCE from Pwn2Own 2021
#16FTA: "Using a combination of proxies, modified DNS records, sslsplit and a new CA certificate installed in Windows, we were able to inspect all traffic, including HTTP and XMPP, in our test environment." I have setup wireshark for troubleshooting. That's about it. What's the role of proxies, modified DNS records etc. in this setup? How can I duplicate this? Thanks.
Re: Zoom RCE from Pwn2Own 2021
#17FTA: "Using a combination of proxies, modified DNS records, sslsplit and a new CA certificate installed in Windows, we were able to inspect all traffic, including HTTP and XMPP, in our test environment." I have setup wireshark for troubleshooting. That's about it. What's the role of proxies, modified DNS records etc. in this setup? How can I duplicate this? Thanks.
Re: Zoom RCE from Pwn2Own 2021
#18FTA: "Using a combination of proxies, modified DNS records, sslsplit and a new CA certificate installed in Windows, we were able to inspect all traffic, including HTTP and XMPP, in our test environment." I have setup wireshark for troubleshooting. That's about it. What's the role of proxies, modified DNS records etc. in this setup? How can I duplicate this? Thanks.
The HTTP and XMPP traffic is encrypted using TLS. The proxies were used to decrypt, log and re-encrypt this traffic in real-time.
Re: Zoom RCE from Pwn2Own 2021
#19No one should be installing native apps for this now that we have WebRTC.
So browser sandboxing? Is that fundamentally different from native sandboxes like snap, flatpak, et al?
I know that at least X11 is not sandboxed with snap/flatpak/etc., and there is no sandbox for macOS/Windows Zoom client, so using web client is infinitely more isolated.
Re: Zoom RCE from Pwn2Own 2021
#20No one should be installing native apps for this now that we have WebRTC.
To be frank, if Zoom was a web only app (or maybe web plus web-in-a-electron like eg Slack and WhatsApp) there'd be a vocal HN crowd complaining that there was no proper native app.