CVE-2024-3017
📋 TL;DR
A memory corruption vulnerability in Silicon Labs multi-protocol gateways allows attackers to crash the OpenThread Border Router application by exploiting a corrupt pointer in the radio co-processor. This causes temporary denial-of-service, affecting systems using these gateways for IoT/Thread network border routing.
💻 Affected Systems
- Silicon Labs multi-protocol gateways with OpenThread Border Router functionality
⚠️ 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
Permanent device crash requiring physical reset, disrupting all Thread network connectivity and dependent IoT operations.
Likely Case
Temporary OTBR application crash causing brief network disruption until automatic restart mechanisms recover service.
If Mitigated
Minimal impact with proper network segmentation and monitoring allowing quick detection and recovery.
🎯 Exploit Status
Requires ability to send crafted packets to the OTBR service, but no authentication needed. Exploit involves triggering specific memory corruption conditions.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check latest Simplicity SDK releases (specific version not specified in provided references)
Vendor Advisory: https://community.silabs.com/069Vm000007UEhZIAW
Restart Required: Yes
Instructions:
1. Update to latest Simplicity SDK from Silicon Labs GitHub. 2. Rebuild and flash gateway firmware. 3. Restart the gateway device.
🔧 Temporary Workarounds
Network Segmentation
allIsolate OTBR services from untrusted networks to limit attack surface
Service Monitoring and Auto-restart
linuxImplement monitoring to detect OTBR crashes and automatically restart the service
# Example for Linux systems with systemd
# Create service monitor: sudo nano /etc/systemd/system/otbr-monitor.service
# Configure to restart on failure in otbr.service unit file
🧯 If You Can't Patch
- Implement strict network access controls to OTBR services
- Deploy redundant OTBR instances with failover capabilities
🔍 How to Verify
Check if Vulnerable:
Check if using Silicon Labs multi-protocol gateway with OTBR and verify SDK version against patched releasesCheck Version:
Check device firmware version via manufacturer's management interface or CLIVerify Fix Applied:
Verify SDK version is updated and test OTBR stability under normal and stress conditions📡 Detection & Monitoring
Log Indicators:
- OTBR application crash logs
- Unexpected service restarts
- RCP error messages
Network Indicators:
- Unusual packet patterns to OTBR ports
- Sudden loss of Thread network connectivity
SIEM Query:
service:"otbr" AND (event_type:"crash" OR event_type:"restart")