CVE-2024-3051
📋 TL;DR
This vulnerability allows attackers to send malformed Device Reset Locally command classes to temporarily deny service to end devices. When exploited, the gateway stops acknowledging frames from affected devices, causing service disruption. This affects systems using vulnerable Silicon Labs Z-Wave implementations.
💻 Affected Systems
- Silicon Labs Z-Wave SDK implementations
- Devices using Z-Wave 700/800 series chips
⚠️ Manual Verification Required
This CVE does not have specific version information in our database, so automatic vulnerability detection cannot determine if your system is affected.
Why? The CVE database entry doesn't specify which versions are vulnerable (no version ranges provided by the vendor/NVD).
🔒 Custom verification scripts are available for registered users. Sign up free to download automated test scripts.
- Review the CVE details at NVD
- Check vendor security advisories for your specific version
- Test if the vulnerability is exploitable in your environment
- Consider updating to the latest version as a precaution
⚠️ Risk & Real-World Impact
Worst Case
Prolonged denial of service affecting critical IoT devices like security sensors, medical devices, or industrial controls, potentially leading to safety risks or system failures.
Likely Case
Temporary service disruption of smart home or building automation devices, causing inconvenience but typically no permanent damage.
If Mitigated
Minimal impact with proper network segmentation and monitoring; affected devices recover after attack stops.
🎯 Exploit Status
Exploitation requires sending malformed Z-Wave frames but doesn't require authentication. Requires knowledge of Z-Wave protocol and physical/network access to the Z-Wave network.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Not specified in advisory; check vendor updates
Vendor Advisory: https://community.silabs.com/068Vm0000045w2j
Restart Required: Yes
Instructions:
1. Check Silicon Labs advisory for specific patch versions. 2. Update Z-Wave SDK or gateway firmware to patched version. 3. Restart affected devices and controllers. 4. Verify normal operation post-update.
🔧 Temporary Workarounds
Network Segmentation
allIsolate Z-Wave network from untrusted networks to prevent remote exploitation
Disable Unnecessary Features
allDisable Device Reset Locally command processing if not required
🧯 If You Can't Patch
- Implement network monitoring for abnormal Z-Wave traffic patterns
- Segment Z-Wave controllers on isolated VLANs with strict access controls
🔍 How to Verify
Check if Vulnerable:
Check if your Z-Wave gateway/controller uses Silicon Labs Z-Wave SDK and hasn't been updated per the advisoryCheck Version:
Vendor-specific commands; typically through gateway admin interface or manufacturer toolsVerify Fix Applied:
Test Device Reset Locally command functionality after patch; ensure normal acknowledgment behavior📡 Detection & Monitoring
Log Indicators:
- Unusual Device Reset Locally command frequency
- Gateway log entries showing malformed command processing
- Increased device disconnection events
Network Indicators:
- Abnormal Z-Wave frame patterns
- Repeated malformed command transmissions
- Unacknowledged device frames
SIEM Query:
source="zwave_gateway" AND (command="DeviceResetLocally" OR error="malformed")