Buffer overflow in Zoom Client and other products

  • ZSB-21019
  • CVE-2021-34423
  • High
  • 7.3
  • CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L

A buffer overflow vulnerability was discovered in the products listed in the “Affected Products'' section of this bulletin. This can potentially allow a malicious actor to crash the service or application, or leverage this vulnerability to execute arbitrary code.

Zoom has addressed this issue in the latest releases of the products listed in the section below. Users can help keep themselves secure by applying current updates or downloading the latest Zoom software with all current security updates.

  • Zoom Client for Meetings (for Android, iOS, Linux, macOS, and Windows) before version 5.8.4
  • Zoom Client for Meetings for Blackberry (for Android and iOS) before version 5.8.1
  • Zoom Client for Meetings for intune (for Android and iOS) before version 5.8.4
  • Zoom Client for Meetings for Chrome OS before version 5.0.1
  • Zoom Rooms for Conference Room (for Android, AndroidBali, macOS, and Windows) before version 5.8.3
  • Controllers for Zoom Rooms (for Android, iOS, and Windows) before version 5.8.3
  • Zoom VDI Windows Meeting Client before version 5.8.4
  • Zoom VDI Azure Virtual Desktop Plugins (for Windows x86 or x64, IGEL x64, Ubuntu x64, HP ThinPro OS x64) before version 5.8.4.21112
  • Zoom VDI Citrix Plugins (for Windows x86 or x64, Mac Universal Installer & Uninstaller, IGEL x64, eLux RP6 x64, HP ThinPro OS x64, Ubuntu x64, CentOS x 64, Dell ThinOS) before version 5.8.4.21112
  • Zoom VDI VMware Plugins (for Windows x86 or x64, Mac Universal Installer & Uninstaller, IGEL x64, eLux RP6 x64, HP ThinPro OS x64, Ubuntu x64, CentOS x 64, Dell ThinOS) before version 5.8.4.21112
  • Zoom Meeting SDK for Android before version 5.7.6.1922
  • Zoom Meeting SDK for iOS before version 5.7.6.1082
  • Zoom Meeting SDK for macOS before version 5.7.6.1340
  • Zoom Meeting SDK for Windows before version 5.7.6.1081
  • Zoom Video SDK (for Android, iOS, macOS, and Windows) before version 1.1.2
  • Zoom On-Premise Meeting Connector Controller before version 4.8.12.20211115
  • Zoom On-Premise Meeting Connector MMR before version 4.8.12.20211115
  • Zoom On-Premise Recording Connector before version 5.1.0.65.20211116
  • Zoom On-Premise Virtual Room Connector before version 4.4.7266.20211117
  • Zoom On-Premise Virtual Room Connector Load Balancer before version 2.5.5692.20211117
  • Zoom Hybrid Zproxy before version 1.0.1058.20211116
  • Zoom Hybrid MMR before version 4.6.20211116.131_x86-64

Reported by Natalie Silvanovich of Google Project Zero

Revision Date Description
1.0 11/24/2021

Initial Publication