CVE-2021-34423

CVSS V2 High 7.5 CVSS V3 Critical 9.8
Description
A buffer overflow vulnerability was discovered in Zoom Client for Meetings (for Android, iOS, Linux, macOS, and Windows) before version 5.8.4, Zoom Client for Meetings for Blackberry (for Android and iOS) before version 5.8.1, Zoom Client for Meetings for intune (for Android and iOS) before version 5.8.4, Zoom Client for Meetings for Chrome OS before version 5.0.1, Zoom Rooms for Conference Room (for Android, AndroidBali, macOS, and Windows) before version 5.8.3, Controllers for Zoom Rooms (for Android, iOS, and Windows) before version 5.8.3, Zoom VDI Windows Meeting Client before version 5.8.4, Zoom VDI Azure Virtual Desktop Plugins (for Windows x86 or x64, IGEL x64, Ubuntu x64, HP ThinPro OS x64) before version 5.8.4.21112, Zoom VDI Citrix Plugins (for Windows x86 or x64, Mac Universal Installer & Uninstaller, IGEL x64, eLux RP6 x64, HP ThinPro OS x64, Ubuntu x64, CentOS x 64, Dell ThinOS) before version 5.8.4.21112, Zoom VDI VMware Plugins (for Windows x86 or x64, Mac Universal Installer & Uninstaller, IGEL x64, eLux RP6 x64, HP ThinPro OS x64, Ubuntu x64, CentOS x 64, Dell ThinOS) before version 5.8.4.21112, Zoom Meeting SDK for Android before version 5.7.6.1922, Zoom Meeting SDK for iOS before version 5.7.6.1082, Zoom Meeting SDK for macOS before version 5.7.6.1340, Zoom Meeting SDK for Windows before version 5.7.6.1081, Zoom Video SDK (for Android, iOS, macOS, and Windows) before version 1.1.2, Zoom On-Premise Meeting Connector Controller before version 4.8.12.20211115, Zoom On-Premise Meeting Connector MMR before version 4.8.12.20211115, Zoom On-Premise Recording Connector before version 5.1.0.65.20211116, Zoom On-Premise Virtual Room Connector before version 4.4.7266.20211117, Zoom On-Premise Virtual Room Connector Load Balancer before version 2.5.5692.20211117, Zoom Hybrid Zproxy before version 1.0.1058.20211116, and Zoom Hybrid MMR before version 4.6.20211116.131_x86-64. This can potentially allow a malicious actor to crash the service or application, or leverage this vulnerability to execute arbitrary code.
Overview
  • CVE ID
  • CVE-2021-34423
  • Assigner
  • security@zoom.us
  • Vulnerability Status
  • Analyzed
  • Published Version
  • 2021-11-24T17:15:07
  • Last Modified Date
  • 2022-04-29T17:57:42
Weakness Enumerations
CWE URL
CWE-120 http://cwe.mitre.org/data/definitions/120.html
CPE Configuration (Product)
CPE Vulnerable Operator Version Start Version End
AND
cpe:2.3:a:zoom:meetings:*:*:*:*:*:*:*:* 1 OR 5.8.3
cpe:2.3:o:google:android:-:*:*:*:*:*:*:* 0 OR
AND
cpe:2.3:a:zoom:meetings:*:*:*:*:*:*:*:* 1 OR 5.8.4
cpe:2.3:o:apple:macos:-:*:*:*:*:*:*:* 0 OR
AND
cpe:2.3:a:zoom:meetings:*:*:*:*:*:*:*:* 1 OR 5.8.4
cpe:2.3:o:apple:iphone_os:-:*:*:*:*:*:*:* 0 OR
AND
cpe:2.3:a:zoom:meetings:*:*:*:*:*:*:*:* 1 OR 5.8.4
cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:* 0 OR
AND
cpe:2.3:a:zoom:meetings:*:*:*:*:*:*:*:* 1 OR 5.8.4
cpe:2.3:o:microsoft:windows:-:*:*:*:*:*:*:* 0 OR
AND
cpe:2.3:a:zoom:meetings_for_blackberry:*:*:*:*:*:*:*:* 1 OR 5.8.1
cpe:2.3:o:google:android:-:*:*:*:*:*:*:* 0 OR
AND
cpe:2.3:a:zoom:meetings_for_blackberry:*:*:*:*:*:*:*:* 1 OR 5.8.1
cpe:2.3:o:apple:iphone_os:-:*:*:*:*:*:*:* 0 OR
AND
cpe:2.3:a:zoom:meetings_for_intune:*:*:*:*:*:*:*:* 1 OR 5.8.4
cpe:2.3:o:apple:iphone_os:-:*:*:*:*:*:*:* 0 OR
AND
cpe:2.3:a:zoom:meetings_for_intune:*:*:*:*:*:*:*:* 1 OR 5.8.4
cpe:2.3:o:google:android:-:*:*:*:*:*:*:* 0 OR
AND
cpe:2.3:a:zoom:meetings_for_chrome_os:*:*:*:*:*:*:*:* 1 OR 5.0.1
AND
cpe:2.3:a:zoom:rooms_for_conference_rooms:*:*:*:*:*:*:*:* 1 OR 5.8.3
cpe:2.3:o:google:android:-:*:*:*:*:*:*:* 0 OR
AND
cpe:2.3:a:zoom:rooms_for_conference_rooms:*:*:*:*:*:*:*:* 1 OR 5.8.3
cpe:2.3:o:apple:macos:-:*:*:*:*:*:*:* 0 OR
AND
cpe:2.3:a:zoom:rooms_for_conference_rooms:*:*:*:*:*:*:*:* 1 OR 5.8.3
cpe:2.3:o:microsoft:windows:-:*:*:*:*:*:*:* 0 OR
AND
cpe:2.3:a:zoom:controllers_for_zoom_rooms:*:*:*:*:*:*:*:* 1 OR 5.8.3
cpe:2.3:o:microsoft:windows:-:*:*:*:*:*:*:* 0 OR
AND
cpe:2.3:a:zoom:controllers_for_zoom_rooms:*:*:*:*:*:*:*:* 1 OR 5.8.3
cpe:2.3:o:apple:iphone_os:-:*:*:*:*:*:*:* 0 OR
AND
cpe:2.3:a:zoom:controllers_for_zoom_rooms:*:*:*:*:*:*:*:* 1 OR 5.8.3
cpe:2.3:o:google:android:-:*:*:*:*:*:*:* 0 OR
AND
cpe:2.3:a:zoom:virtual_desktop_infrastructure:*:*:*:*:*:*:*:* 1 OR 5.8.4
AND
cpe:2.3:a:zoom:android_meeting_sdk:*:*:*:*:*:*:*:* 1 OR 5.7.6.1922
cpe:2.3:a:zoom:iphone_os_meeting_sdk:*:*:*:*:*:*:*:* 1 OR 5.7.6.1082
cpe:2.3:a:zoom:macos_meeting_sdk:*:*:*:*:*:*:*:* 1 OR 5.7.6.1340
cpe:2.3:a:zoom:windows_meeting_sdk:*:*:*:*:*:*:*:* 1 OR 5.7.6.1081
AND
cpe:2.3:a:zoom:android_video_sdk:*:*:*:*:*:*:*:* 1 OR 1.1.2
cpe:2.3:a:zoom:iphone_os_video_sdk:*:*:*:*:*:*:*:* 1 OR 1.1.2
cpe:2.3:a:zoom:macos_video_sdk:*:*:*:*:*:*:*:* 1 OR 1.1.2
cpe:2.3:a:zoom:windows_video_sdk:*:*:*:*:*:*:*:* 1 OR 1.1.2
AND
cpe:2.3:a:zoom:hybrid_mmr:*:*:*:*:*:*:*:* 1 OR 4.6.20211116.131
cpe:2.3:a:zoom:hybrid_zproxy:*:*:*:*:*:*:*:* 1 OR 1.0.1058.20211116
cpe:2.3:a:zoom:zoom_on-premise_meeting_connector_controller:*:*:*:*:*:*:*:* 1 OR 4.8.12.20211115
cpe:2.3:a:zoom:zoom_on-premise_meeting_connector_mmr:*:*:*:*:*:*:*:* 1 OR 4.8.12.20211115
cpe:2.3:a:zoom:zoom_on-premise_recording_connector:*:*:*:*:*:*:*:* 1 OR 5.1.0.65.20211116
cpe:2.3:a:zoom:zoom_on-premise_virtual_room_connector:*:*:*:*:*:*:*:* 1 OR 4.4.7266.20211117
cpe:2.3:a:zoom:zoom_on-premise_virtual_room_connector_load_balancer:*:*:*:*:*:*:*:* 1 OR 2.5.5692.20211117
AND
cpe:2.3:a:zoom:vdi_azure_virtual_desktop:*:*:*:*:*:*:*:* 1 OR 5.8.4.21112
cpe:2.3:a:zoom:vdi_citrix:*:*:*:*:*:*:*:* 1 OR 5.8.4.21112
cpe:2.3:a:zoom:vdi_vmware:*:*:*:*:*:*:*:* 1 OR 5.8.4.21112
cpe:2.3:a:zoom:vdi_windows_meeting_client:*:*:*:*:*:*:*:* 1 OR 5.8.4
CVSS Version 2
  • Version
  • 2.0
  • Vector String
  • AV:N/AC:L/Au:N/C:P/I:P/A:P
  • Access Vector
  • NETWORK
  • Access Compatibility
  • LOW
  • Authentication
  • NONE
  • Confidentiality Impact
  • PARTIAL
  • Integrity Impact
  • PARTIAL
  • Availability Impact
  • PARTIAL
  • Base Score
  • 7.5
  • Severity
  • HIGH
  • Exploitability Score
  • 10
  • Impact Score
  • 6.4
CVSS Version 3
  • Version
  • 3.1
  • Vector String
  • CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
  • Attack Vector
  • NETWORK
  • Attack Compatibility
  • LOW
  • Privileges Required
  • NONE
  • User Interaction
  • NONE
  • Scope
  • UNCHANGED
  • Confidentiality Impact
  • HIGH
  • Availability Impact
  • HIGH
  • Base Score
  • 9.8
  • Base Severity
  • CRITICAL
  • Exploitability Score
  • 3.9
  • Impact Score
  • 5.9
References
Reference URL Reference Tags
https://explore.zoom.us/en/trust/security/security-bulletin Vendor Advisory
http://packetstormsecurity.com/files/165417/Zoom-Chat-Message-Processing-Buffer-Overflow.html Third Party Advisory VDB Entry
Sources
Source Name Source URL
NIST https://nvd.nist.gov/vuln/detail/CVE-2021-34423
MITRE https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-34423
History
Created Old Value New Value Data Type Notes
2022-05-08 06:20:22 Added to TrackCVE
2022-12-05 15:10:19 2021-11-24T17:15Z 2021-11-24T17:15:07 CVE Published Date updated
2022-12-05 15:10:19 2022-04-29T17:57:42 CVE Modified Date updated
2022-12-05 15:10:19 Analyzed Vulnerability Status updated