CVE-2024-27239
📋 TL;DR
A use-after-free vulnerability in Zoom Workplace Apps and SDKs allows authenticated users to cause denial of service through network access. This affects users of vulnerable Zoom applications who have network connectivity to the affected systems. The vulnerability requires authentication but could disrupt service availability.
💻 Affected Systems
- Zoom Workplace Apps
- Zoom SDKs
📦 What is this software?
Rooms by Zoom
Rooms by Zoom
Rooms by Zoom
Workplace Virtual Desktop Infrastructure by Zoom
View all CVEs affecting Workplace Virtual Desktop Infrastructure →
⚠️ Risk & Real-World Impact
Worst Case
Complete service disruption for Zoom applications, requiring restart or reinstallation of affected software.
Likely Case
Temporary application crashes or instability affecting individual users or small groups.
If Mitigated
Minimal impact with proper network segmentation and authentication controls limiting exploit scope.
🎯 Exploit Status
Requires authenticated access and network connectivity; use-after-free vulnerabilities typically require specific conditions to trigger.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check Zoom security bulletin ZSB-24018 for specific patched versions
Vendor Advisory: https://www.zoom.com/en/trust/security-bulletin/zsb-24018/
Restart Required: Yes
Instructions:
1. Visit Zoom security bulletin ZSB-24018. 2. Identify affected products and versions. 3. Update to latest patched versions. 4. Restart applications/services.
🔧 Temporary Workarounds
Network Segmentation
allRestrict network access to Zoom applications to trusted users only
Authentication Controls
allImplement strong authentication and limit user privileges
🧯 If You Can't Patch
- Implement strict network access controls to limit exposure
- Monitor for abnormal application crashes or denial of service patterns
🔍 How to Verify
Check if Vulnerable:
Check application version against Zoom security bulletin ZSB-24018Check Version:
Zoom applications: Check About or Settings menu; SDKs: Check integration documentationVerify Fix Applied:
Verify application version matches or exceeds patched versions listed in ZSB-24018📡 Detection & Monitoring
Log Indicators:
- Unexpected application crashes
- Memory access violation errors
- Denial of service events
Network Indicators:
- Unusual network patterns to Zoom applications
- Multiple authentication attempts
SIEM Query:
source="zoom" AND (event_type="crash" OR event_type="dos")