PT-2021-20520 · Zoom · Zoom Plugin For Microsoft Outlook

Published 2021-09-27 · Updated 2021-10-07 · CVE-2021-34413

Positive Technologies (AI Summary)

CVSS v3.1

7.5

High

Base vector

AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

Name of the Vulnerable Software and Affected Versions: Zoom Plugin for Microsoft Outlook for MacOS versions prior to 5.3.52553.0918

Description: The issue is related to a Time-of-check Time-of-use (TOC/TOU) vulnerability that occurs during the plugin installation process. This could allow a standard user to write their own malicious application to the plugin directory, allowing the malicious application to execute in a privileged context.

Recommendations: For versions prior to 5.3.52553.0918, update to version 5.3.52553.0918 or later to resolve the issue. As a temporary workaround, consider restricting access to the plugin directory to minimize the risk of exploitation.

Fix

Time Of Check To Time Of Use

Weakness Enumeration

CWE-367

Related Identifiers

CVE-2021-34413

Affected Products

Zoom Plugin For Microsoft Outlook

References · 6

• https://nvd.nist.gov/vuln/detail/CVE-2021-34413 · Security Note
• https://osv.dev/vulnerability/CVE-2021-34413 · Vendor Advisory
• https://explore.zoom.us/en/trust/security/security-bulletin · Vendor Advisory
• https://t.me/cibsecurity/29480 · Telegram Post
• https://t.me/cvenotify/21799 · Telegram Post
• https://t.me/cvenotify/21510 · Telegram Post