CVE-2024-3043
📋 TL;DR
An unauthenticated attacker can send a specific IEEE 802.15.4 'co-ordinator realignment' packet to Zigbee nodes, forcing them to change their network identifier (PAN ID). This causes a denial of service by disrupting network communication. This affects Zigbee devices using Silicon Labs Gecko SDK implementations.
💻 Affected Systems
- Silicon Labs Gecko SDK implementations
- Zigbee devices using affected SDK
⚠️ 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
Complete disruption of Zigbee network communication, rendering smart home/industrial IoT devices inoperable until manually reconfigured.
Likely Case
Temporary network disruption affecting device connectivity and automation functions in smart environments.
If Mitigated
Minimal impact with proper network segmentation and monitoring; affected devices can be manually reconnected.
🎯 Exploit Status
Exploitation requires wireless proximity to target Zigbee network and knowledge of packet crafting.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check Silicon Labs advisory for specific patched SDK versions
Vendor Advisory: https://community.silabs.com/069Vm000005UCH0IAO
Restart Required: Yes
Instructions:
1. Check Silicon Labs advisory for affected SDK versions. 2. Update to patched Gecko SDK version. 3. Recompile and redeploy firmware to Zigbee devices. 4. Restart affected devices.
🔧 Temporary Workarounds
Disable coordinator realignment packets
allConfigure Zigbee stack to ignore or reject coordinator realignment packets since they're not needed in production.
Specific configuration depends on device firmware; consult manufacturer documentation
Network segmentation
allIsolate Zigbee networks from untrusted wireless environments using physical separation or RF shielding.
🧯 If You Can't Patch
- Implement network monitoring for unusual Zigbee packet patterns
- Physically secure Zigbee network areas to limit wireless access
🔍 How to Verify
Check if Vulnerable:
Check if Zigbee devices use Silicon Labs Gecko SDK and if coordinator realignment packet handling is enabled.Check Version:
Device-specific; typically requires checking firmware version through manufacturer tools or device interfacesVerify Fix Applied:
Verify firmware version matches patched SDK version from Silicon Labs advisory.📡 Detection & Monitoring
Log Indicators:
- Unexpected network identifier changes
- Zigbee coordinator realignment packet logs
Network Indicators:
- Unusual IEEE 802.15.4 packets with coordinator realignment commands
- Sudden PAN ID changes in network traffic
SIEM Query:
Not typically applicable for Zigbee protocols in standard SIEM systems