By audience
Small and midsize businessEnterprise
Information TechnologyCustomer ExperienceSales and RevenueFacilitiesMarketing and EventsSelect a language
A vulnerability in the macOS Zoom and RingCentral clients could allow a remote, unauthenticated attacker to force a user to join a video call with the video camera active.
The vulnerability is due to insufficient authorization controls to check which systems may communicate with the local Zoom Web server running on port 19421. An attacker could exploit this vulnerability by creating a malicious website that causes the Zoom client to automatically join a meeting set up by the attacker.
Zoom implemented a new Video Preview dialog that is presented to the user before joining a meeting in Client version 4.4.5 published July 14, 2019. This dialog enables the user to join the meeting with or without video enabled and requires the user to set their desired default behavior for video. Zoom urges customers to install the latest Zoom Client release available at https://zoom.us/download.
Discovered by Jonathan Leitschuh.
| Revision | Date | Description |
|---|---|---|
| 1.0 | 07/09/2019 | Initial Publication |