CVE-2023-2626
📋 TL;DR
This authentication bypass vulnerability in OpenThread border router implementations allows unauthenticated attackers to craft radio frames using Key ID Mode 2 to bypass security checks, enabling arbitrary IPv6 packet transmission on Thread networks. This affects OpenThread border router devices and implementations, potentially exposing connected devices to attacks that would normally be blocked by network security controls.
💻 Affected Systems
- OpenThread border router implementations
- Google Nest Wifi Pro
- Other OpenThread-based border routers
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Attackers gain full access to Thread network, intercept/manipulate traffic, exploit vulnerabilities in connected IoT devices, and pivot to other network segments.
Likely Case
Unauthorized network access leading to data interception, device enumeration, and potential exploitation of vulnerable IoT devices on the Thread network.
If Mitigated
Limited impact if devices have additional authentication layers, network segmentation, and proper security controls beyond Thread network security.
🎯 Exploit Status
Exploitation requires wireless proximity to Thread network and knowledge of Key ID Mode 2 frame crafting, but no authentication is needed.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Automatic update beyond affected range
Vendor Advisory: https://support.google.com/product-documentation/answer/13588832
Restart Required: Yes
Instructions:
1. Ensure automatic updates are enabled. 2. Verify device has received latest firmware. 3. Restart affected border router devices. 4. For Google Nest Wifi Pro, ensure automatic updates are enabled in Google Home app.
🔧 Temporary Workarounds
Disable Thread network if not needed
allTemporarily disable Thread networking functionality on border routers
Network segmentation
allIsolate Thread network from critical infrastructure using VLANs or separate network segments
🧯 If You Can't Patch
- Physically isolate Thread network from sensitive systems
- Implement additional authentication layers for devices on Thread network
🔍 How to Verify
Check if Vulnerable:
Check if OpenThread border router is using versions before automatic update. For Google Nest Wifi Pro, check firmware version in Google Home app.Check Version:
Varies by implementation. For Google Nest Wifi Pro: Google Home app > Wi-Fi > Settings > Technical informationVerify Fix Applied:
Verify automatic updates have been applied and device firmware is beyond affected version range. Check that Key ID Mode 2 authentication bypass is no longer possible.📡 Detection & Monitoring
Log Indicators:
- Unauthorized authentication attempts using Key ID Mode 2
- Unexpected radio frame patterns
- Authentication bypass events in Thread network logs
Network Indicators:
- Unusual IPv6 traffic from unauthenticated nodes
- Suspicious radio frame patterns in Thread network traffic
- Authentication bypass attempts in network captures
SIEM Query:
thread_network AND (auth_bypass OR key_id_mode_2 OR unauthorized_node)