CVE-2023-31762
📋 TL;DR
CVE-2023-31762 is a code replay vulnerability in the Digoo DG-HAMB Smart Home Security System transmitter that allows attackers to capture and replay wireless signals to gain full system access. This affects all users of Digoo DG-HAMB Smart Home Security System v1.0 who haven't applied security updates. Attackers can disarm alarms, bypass security controls, and take over the entire smart home security system.
💻 Affected Systems
- Digoo DG-HAMB Smart Home Security System
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Attackers gain complete control of the security system, disarm alarms, disable sensors, and potentially use the system as an entry point to other connected smart home devices.
Likely Case
Attackers disarm the security system to facilitate physical intrusion or theft while alarms remain silent.
If Mitigated
With proper network segmentation and monitoring, impact is limited to the security system itself, though attackers could still disarm alarms.
🎯 Exploit Status
Attack requires wireless signal capture equipment (like SDR devices) but the replay attack itself is straightforward once signals are captured.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: No official vendor advisory found
Restart Required: No
Instructions:
No official patch available. Contact Digoo support for firmware update information or consider replacing the device.
🔧 Temporary Workarounds
Physical Security Enhancement
allImplement additional physical security measures since the wireless protocol cannot be easily secured
Network Segmentation
allIsolate the security system from other smart home devices to prevent lateral movement
🧯 If You Can't Patch
- Replace the Digoo DG-HAMB system with a different security system that uses encrypted wireless protocols
- Implement secondary security measures (cameras, motion sensors) that operate independently of the vulnerable system
🔍 How to Verify
Check if Vulnerable:
Check device firmware version in system settings. If version is v1.0, the device is vulnerable.Check Version:
Check through device's system menu or mobile app for firmware version informationVerify Fix Applied:
No fix available to verify. Consider testing with wireless signal analyzer to check if signals can be replayed.📡 Detection & Monitoring
Log Indicators:
- Multiple disarm commands in rapid succession
- Unusual time-of-day disarm events
- System state changes without user interaction
Network Indicators:
- Wireless signal capture devices detected in proximity
- Unusual RF activity at 433MHz frequency
SIEM Query:
No standard SIEM query available as this is a physical/wireless attack