Exposure of Sensitive Information

  • ZSB-23025
  • CVE-2023-36539
  • Medium
  • 5.3
  • CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N

Exposure of information intended to be encrypted by some Zoom clients may lead to disclosure of sensitive information.

Zoom encrypts in-meeting chat messages using a per-meeting key and then transmits these encrypted messages between user devices and Zoom using TLS encryption. In the affected products, a copy of each in-meeting chat message was also sent encrypted only using TLS and not with the per-meeting key, including messages sent during End-to-End Encrypted (E2EE) meetings.

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, and avoid using the in-meeting chat while on the affected versions.

  • Zoom Desktop Client for Windows 5.15.0 and 5.15.1
  • Zoom Desktop Client for macOS version 5.15.0 only
  • Zoom Desktop Client for Linux version 5.15.0 only
  • Zoom Mobile App for iOS version 5.15.0 only
  • Zoom Mobile App for Android version 5.15.0 only
  • Zoom Rooms for Windows version 5.15.0 only
  • Zoom Rooms for macOS version 5.15.0 only
  • Zoom Rooms for iPad version 5.15.0 only
  • Zoom Phone Appliance version 5.15.0 only
  • Zoom Meeting SDK for Android version 5.15.0 only
  • Zoom Meeting SDK for iOS version 5.15.0 only
  • Zoom Meeting SDK for macOS version 5.15.0 only
  • Zoom Meeting SDK for Windows version 5.15.1 only
  • Zoom Video SDK for Windows version 1.8.0 only
  • Zoom Video SDK for macOS version 1.8.0 only
  • Zoom Video SDK for Android version 1.8.0 only
  • Zoom Video SDK for iOS version 1.8.0 only
  • Zoom Video SDK for Linux version 1.8.0 only

Reported by Zoom Offensive Security Team

Revision Date Description
1.0 06/29/2023

Initial Publication