CVE-2023-3110
📋 TL;DR
An unauthenticated attacker within Z-Wave range can exploit a stack buffer overflow in SiLabs Unify Gateway versions 1.3.1 and earlier to execute arbitrary code. This affects all systems running vulnerable versions of the Unify Gateway software. The vulnerability requires physical proximity to the target device within Z-Wave wireless range.
💻 Affected Systems
- SiLabs Unify Gateway
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise allowing attacker to install persistent backdoors, steal sensitive data, or pivot to other network systems.
Likely Case
Local network compromise leading to gateway device takeover and potential disruption of Z-Wave controlled systems.
If Mitigated
Limited impact if device is physically secured and network segmented, though code execution remains possible.
🎯 Exploit Status
Exploitation requires Z-Wave radio equipment and proximity to target device.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 1.3.2 or later
Vendor Advisory: https://siliconlabs.lightning.force.com/sfc/servlet.shepherd/document/download/0698Y00000V6HZzQAN?operationContext=S1
Restart Required: Yes
Instructions:
1. Download latest firmware from Silicon Labs support portal. 2. Backup current configuration. 3. Apply firmware update via web interface or CLI. 4. Reboot device. 5. Verify version is 1.3.2 or higher.
🔧 Temporary Workarounds
Physical Access Control
allRestrict physical access to Z-Wave range of vulnerable devices
Network Segmentation
allIsolate Unify Gateway on separate VLAN with strict firewall rules
🧯 If You Can't Patch
- Physically relocate device to controlled access area
- Disable Z-Wave radio if not essential for operations
🔍 How to Verify
Check if Vulnerable:
Check firmware version via web interface or SSH: cat /etc/versionCheck Version:
cat /etc/version || unify-gateway --versionVerify Fix Applied:
Confirm version is 1.3.2 or higher and test Z-Wave functionality📡 Detection & Monitoring
Log Indicators:
- Unusual Z-Wave connection attempts
- Memory access violations in system logs
- Unexpected process execution
Network Indicators:
- Anomalous Z-Wave traffic patterns
- Unexpected outbound connections from gateway
SIEM Query:
source="unify-gateway" AND (event_type="buffer_overflow" OR severity="critical")