Vulnerability CVE-2019-13450
Published: 2019-07-09

Description:
In the Zoom Client through 4.4.4 and RingCentral 7.0.136380.0312 on macOS, remote attackers can force a user to join a video call with the video camera active. This occurs because any web site can interact with the Zoom web server on localhost port 19421 or 19424. NOTE: a machine remains vulnerable if the Zoom Client was installed in the past and then uninstalled. Blocking exploitation requires additional steps, such as the ZDisableVideo preference and/or killing the web server, deleting the ~/.zoomus directory, and creating a ~/.zoomus plain file.

Type:

CWE-284

 (Improper Access Control)

CVSS2 => (AV:N/AC:M/Au:N/C:P/I:N/A:N)

CVSS Base Score
Impact Subscore
Exploitability Subscore
4.3/10
2.9/10
8.6/10
Exploit range
Attack complexity
Authentication
Remote
Medium
No required
Confidentiality impact
Integrity impact
Availability impact
Partial
None
None
Affected software
ZOOM -> ZOOM 
Ringcentral -> Ringcentral 

 References:
http://www.securityfocus.com/bid/109082
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://bugs.chromium.org/p/chromium/issues/detail?id=951540
https://medium.com/@jonathan.leitschuh/zoom-zero-day-4-million-webcams-maybe-an-rce-just-get-them-to-visit-your-website-ac75c83f4ef5
https://news.ycombinator.com/item?id=20387298
https://twitter.com/moreati/status/1148548799813640193
https://twitter.com/zoom_us/status/1148710712241295361
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