Security Experts:

Zoom for macOS Contains High-Risk Security Flaw

Video messaging technology powerhouse Zoom has rolled out a high-priority patch for macOS users alongside a warning that hackers could abuse the software flaw to connect to and control Zoom Apps.

The vulnerability, which carries a CVSS severity score of 7.3/10, is documented as a debugging port misconfiguration that is opened by the Zoom client on macOS machines.

Details from Zoom’s advisory:

Zoom Client for Meetings for macOS (Standard and for IT Admin) starting with 5.10.6 and prior to 5.12.0 contains a debugging port misconfiguration. When camera mode rendering context is enabled as part of the Zoom App Layers API by running certain Zoom Apps, a local debugging port is opened by the Zoom client. A local malicious user could use this debugging port to connect to and control the Zoom Apps running in the Zoom client.

The vulnerability, tracked as CVE-2022-28762, affects Zoom Client for Meetings for macOS (Standard and for IT Admin) starting with 5.10.6 and prior to 5.12.0. The company credited its internal security team with finding the issue.

The Zoom security response team also released a patch for a medium-severity issue affecting the Zoom On-Premise Meeting Connector Multimedia Router (MMR). 

The vulnerability (CVE-2022-28761) carries a CVSS score of 6.5 and is described as an improper access control bug.

“Zoom On-Premise Meeting Connector MMR before version 4.8.20220916.131 contains an improper access control vulnerability. As a result, a malicious actor in a meeting or webinar they are authorized to join could prevent participants from receiving audio and video causing meeting disruptions,” the company said in an advisory.

Related: Zoom Patches High-Risk Flaws in Meeting Connector, Keybase Client

Related: Fortinet Admits Many Devices Still Unprotected Against Exploited Vulnerability

Related: Project Zero Flags High-Risk Zoom Security Flaw

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Ryan Naraine is Editor-at-Large at SecurityWeek and host of the popular Security Conversations podcast series. Ryan is a veteran cybersecurity strategist who has built security engagement programs at major global brands, including Intel Corp., Bishop Fox and GReAT. He is a co-founder of Threatpost and the global SAS conference series. Ryan's past career as a security journalist included bylines at major technology publications including Ziff Davis eWEEK, CBS Interactive's ZDNet, PCMag and PC World. Ryan is a director of the Security Tinkerers non-profit, an advisor to early-stage entrepreneurs, and a regular speaker at security conferences around the world. Follow Ryan on Twitter @ryanaraine.