CVE-2021-34423
published 2021-11-24CVE-2021-34423: 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…
PriorityP354critical9.8CVSS 3.1
AVNACLPRNUINSUCHIHAH
EPSS
3.21%
86.6th percentile
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 l
Affected
42 ranges· showing 25
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| zoom | android_meeting_sdk | < 5.7.6.1922 | 5.7.6.1922 |
| zoom | android_video_sdk | < 1.1.2 | 1.1.2 |
| zoom | controllers_for_zoom_rooms | < 5.8.3 | 5.8.3 |
| zoom | hybrid_mmr | < 4.6.20211116.131 | 4.6.20211116.131 |
| zoom | hybrid_zproxy | < 1.0.1058.20211116 | 1.0.1058.20211116 |
| zoom | iphone_os_meeting_sdk | < 5.7.6.1082 | 5.7.6.1082 |
| zoom | iphone_os_video_sdk | < 1.1.2 | 1.1.2 |
| zoom | macos_meeting_sdk | < 5.7.6.1340 | 5.7.6.1340 |
| zoom | macos_video_sdk | < 1.1.2 | 1.1.2 |
| zoom | meetings | < 5.8.3 | 5.8.3 |
| zoom | meetings | < 5.8.4 | 5.8.4 |
| zoom | meetings_for_blackberry | < 5.8.1 | 5.8.1 |
| zoom | meetings_for_chrome_os | < 5.0.1 | 5.0.1 |
| zoom | meetings_for_intune | < 5.8.4 | 5.8.4 |
| zoom | rooms_for_conference_rooms | < 5.8.3 | 5.8.3 |
| zoom | vdi_azure_virtual_desktop | < 5.8.4.21112 | 5.8.4.21112 |
| zoom | vdi_citrix | < 5.8.4.21112 | 5.8.4.21112 |
| zoom | vdi_vmware | < 5.8.4.21112 | 5.8.4.21112 |
| zoom | vdi_windows_meeting_client | < 5.8.4 | 5.8.4 |
| zoom | virtual_desktop_infrastructure | < 5.8.4 | 5.8.4 |
| zoom | windows_meeting_sdk | < 5.7.6.1081 | 5.7.6.1081 |
| zoom | windows_video_sdk | < 1.1.2 | 1.1.2 |
| zoom | zoom_on-premise_meeting_connector_controller | < 4.8.12.20211115 | 4.8.12.20211115 |
| zoom | zoom_on-premise_meeting_connector_mmr | < 4.8.12.20211115 | 4.8.12.20211115 |
| zoom | zoom_on-premise_recording_connector | < 5.1.0.65.20211116 | 5.1.0.65.20211116 |
CVSS provenance
nvdv3.19.8CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
nvdv3.07.3HIGHCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
nvdv2.07.5HIGHAV:N/AC:L/Au:N/C:P/I:P/A:P
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GHSA
GHSA-m7cq-vpfp-92jw: A buffer overflow vulnerability was discovered in Zoom Client for Meetings (for Android, iOS, Linux, macOS, and Windows) before version 5
ghsa_unreviewed·2022-05-24
CVE-2021-34423 [CRITICAL] CWE-120 GHSA-m7cq-vpfp-92jw: A buffer overflow vulnerability was discovered in Zoom Client for Meetings (for Android, iOS, Linux, macOS, and Windows) before version 5
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 before version 5.8.4, 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, Zo
Project0
Zooming in on Zero-click Exploits - Project Zero
project_zero·2022-01-01
CVE-2021-34423 Zooming in on Zero-click Exploits - Project Zero
Posted by Natalie Silvanovich, Project Zero
Zoom is a video conferencing platform that has gained popularity throughout the pandemic. Unlike other video conferencing systems that I have investigated, where one user initiates a call that other users must immediately accept or reject, Zoom calls are typically scheduled in advance and joined via an email invitation. In the past, I hadn’t prioritized reviewing Zoom because I believed that any attack against a Zoom client would require multiple clicks from a user. However, a zero-click attack against the Windows Zoom client was recently revealed at Pwn2Own, showing that it does indeed have a fully remote attack surface. The following post details my investigation into Zoom.
This analysis resulted in two vulnerabilities being reported to
Citrix
CVE-2021-34423: A buffer overflow vulnerability was discovered in Zoom Client for Meetings (for Android, iOS, Linux, macOS, and Windows) before version 5.8.4, Zoom Cl
vendor_citrix·2021-11-24·CVSS 9.8
CVE-2021-34423 [CRITICAL] CWE-120 CVE-2021-34423: A buffer overflow vulnerability was discovered in Zoom Client for Meetings (for Android, iOS, Linux, macOS, and Windows) before version 5.8.4, Zoom Cl
CVE-2021-34423: 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,
No detection rules found.
No public exploits indexed.
No writeups or analysis indexed.
http://packetstormsecurity.com/files/165417/Zoom-Chat-Message-Processing-Buffer-Overflow.htmlhttps://explore.zoom.us/en/trust/security/security-bulletinhttp://packetstormsecurity.com/files/165417/Zoom-Chat-Message-Processing-Buffer-Overflow.htmlhttps://explore.zoom.us/en/trust/security/security-bulletin
2021-11-24
Published