Windows Zoom Installer Digital Signature Bypass

  • ZSB-21003
  • CVE-2021-33907
  • High
  • 7
  • CVSS:3.0/AV:L/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:H/CR:H/IR:H/AR:H/MAV:L/MAC:H/MPR:N/MUI:R/MS:U/MC:H/MI:H/MA:H

The Zoom Client for Meetings for Windows in all versions before 5.3.0 fails to properly validate the certificate information used to sign .msi files when performing an update of the client. This could lead to remote code execution in an elevated privileged context.

Users can help keep themselves secure by applying current updates or downloading the latest Zoom software with all current security updates from https://zoom.us/download.

  • All versions of the Zoom Client for Meetings for Windows before version 5.3.0

Reported by the Lockheed Martin Red Team

Revision Date Description
1.0 09/30/2021

Initial Publication