PT-2021-20360 · Zoom · Zoom Client For Meetings

Published 2021-09-27 · Updated 2021-10-06 · CVE-2021-33907

Positive Technologies (AI Summary)

CVSS v2.0

10

Critical

Base vector

AV:N/AC:L/Au:N/C:C/I:C/A:C

Name of the Vulnerable Software and Affected Versions: Zoom Client for Meetings for Windows versions prior to 5.3.0

Description: The issue arises from the improper validation of certificate information used to sign .msi files during client updates, potentially leading to remote code execution in an elevated privileged context.

Recommendations: For versions prior to 5.3.0, update to version 5.3.0 or later to resolve the issue. As a temporary workaround, consider restricting the update process to minimize the risk of exploitation.

Fix

Improper Certificate Validation

Weakness Enumeration

CWE-295

Related Identifiers

CVE-2021-33907

Affected Products

Zoom Client For Meetings

References · 6

• https://explore.zoom.us/en/trust/security/security-bulletin · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2021-33907 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2021-33907 · Security Note
• https://t.me/cibsecurity/29472 · Telegram Post
• https://t.me/cvenotify/21516 · Telegram Post
• https://t.me/cvenotify/21793 · Telegram Post