CVE-2021-34420

CVSS V2 Medium 4.3 CVSS V3 High 7.4
Description
The Zoom Client for Meetings for Windows installer before version 5.5.4 does not properly verify the signature of files with .msi, .ps1, and .bat extensions. This could lead to a malicious actor installing malicious software on a customer’s computer.
Overview
  • CVE ID
  • CVE-2021-34420
  • Assigner
  • security@zoom.us
  • Vulnerability Status
  • Analyzed
  • Published Version
  • 2021-11-11T23:15:09
  • Last Modified Date
  • 2021-12-16T18:39:28
Weakness Enumerations
CWE URL
CWE-347 http://cwe.mitre.org/data/definitions/347.html
CPE Configuration (Product)
CPE Vulnerable Operator Version Start Version End
cpe:2.3:a:zoom:zoom_client_for_meetings:*:*:*:*:*:windows:*:* 1 OR 5.4.4
CVSS Version 2
  • Version
  • 2.0
  • Vector String
  • AV:N/AC:M/Au:N/C:N/I:P/A:N
  • Access Vector
  • NETWORK
  • Access Compatibility
  • MEDIUM
  • Authentication
  • NONE
  • Confidentiality Impact
  • NONE
  • Integrity Impact
  • PARTIAL
  • Availability Impact
  • NONE
  • Base Score
  • 4.3
  • Severity
  • MEDIUM
  • Exploitability Score
  • 8.6
  • Impact Score
  • 2.9
CVSS Version 3
  • Version
  • 3.1
  • Vector String
  • CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:N/I:H/A:N
  • Attack Vector
  • NETWORK
  • Attack Compatibility
  • LOW
  • Privileges Required
  • NONE
  • User Interaction
  • REQUIRED
  • Scope
  • CHANGED
  • Confidentiality Impact
  • NONE
  • Availability Impact
  • NONE
  • Base Score
  • 7.4
  • Base Severity
  • HIGH
  • Exploitability Score
  • 2.8
  • Impact Score
  • 4
References
Reference URL Reference Tags
https://medium.com/manomano-tech/a-red-team-operation-leveraging-a-zero-day-vulnerability-in-zoom-80f57fb0822e Third Party Advisory
https://explore.zoom.us/en/trust/security/security-bulletin Vendor Advisory
Sources
Source Name Source URL
NIST https://nvd.nist.gov/vuln/detail/CVE-2021-34420
MITRE https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-34420
History
Created Old Value New Value Data Type Notes
2022-05-10 06:40:57 Added to TrackCVE
2022-12-05 14:21:42 2021-11-11T23:15Z 2021-11-11T23:15:09 CVE Published Date updated
2022-12-05 14:21:42 2021-12-16T18:39:28 CVE Modified Date updated
2022-12-05 14:21:42 Analyzed Vulnerability Status updated