Description
In the Zoom Client before 4.4.2 on macOS, remote attackers can cause a denial of service (continual focus grabs) via a sequence of invalid launch?action=join&confno= requests to localhost port 19421.
References
- https://medium.com/%40jonathan.leitschuh/zoom-zero-day-4-million-webcams-maybe-an-rce-just-get-them-to-visit-your-website-ac75c83f4ef5
- https://assets.zoom.us/docs/pdf/Zoom+Response+Video-On+Vulnerability.pdf
- https://blog.zoom.us/wordpress/2019/07/08/response-to-video-on-concern/
- https://twitter.com/zoom_us/status/1148710712241295361
- https://bugs.chromium.org/p/chromium/issues/detail?id=951540