CVE-2024-37086
📋 TL;DR
This vulnerability allows a malicious actor with local administrative privileges on a virtual machine with an existing snapshot to trigger an out-of-bounds read in VMware ESXi. This can lead to a denial-of-service condition of the host, affecting ESXi hypervisor environments.
💻 Affected Systems
- VMware ESXi
📦 What is this software?
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⚠️ Risk & Real-World Impact
Worst Case
Complete host denial-of-service, disrupting all virtual machines running on the affected ESXi server.
Likely Case
Host instability or crash requiring manual intervention to restore service.
If Mitigated
Limited impact due to restricted administrative access and snapshot management controls.
🎯 Exploit Status
Requires specific preconditions (VM admin + existing snapshot) making exploitation more complex than simple attacks.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check VMware security advisory for specific patched versions
Vendor Advisory: https://support.broadcom.com/web/ecx/support-content-notification/-/external/content/SecurityAdvisories/0/24505
Restart Required: Yes
Instructions:
1. Review VMware security advisory for affected versions. 2. Download appropriate ESXi patch from VMware. 3. Place host in maintenance mode. 4. Apply patch via vSphere Client or CLI. 5. Reboot host. 6. Verify patch installation.
🔧 Temporary Workarounds
Restrict VM Administrative Access
allLimit local administrative privileges on virtual machines to trusted users only.
Manage Snapshots Carefully
allAvoid keeping unnecessary snapshots and implement snapshot lifecycle management.
🧯 If You Can't Patch
- Implement strict access controls for VM administrative privileges
- Regularly review and remove unnecessary VM snapshots
🔍 How to Verify
Check if Vulnerable:
Check ESXi version against VMware security advisory for affected versionsCheck Version:
esxcli system version getVerify Fix Applied:
Verify ESXi version matches patched version from VMware advisory📡 Detection & Monitoring
Log Indicators:
- Host crash events
- Unexpected host reboots
- VM snapshot-related errors
Network Indicators:
- Sudden loss of connectivity to VMs on affected host
SIEM Query:
Search for ESXi host crash events or unexpected reboots in virtualization logs