CVE-2021-40043
📋 TL;DR
This CVE describes a laser command injection vulnerability in Huawei AIS-BW80H-00 devices that allows attackers to execute voice commands on the device. Attackers need visual access to the device to exploit it. Affected are Huawei AIS-BW80H-00 devices running versions earlier than 9.0.3.4(H100SP13C00).
💻 Affected Systems
- Huawei AIS-BW80H-00
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Attackers with visual access could execute arbitrary voice commands on the device, potentially enabling unauthorized control, information disclosure, or further system compromise.
Likely Case
Attackers with physical or visual proximity could trigger unintended voice commands, potentially disrupting device functionality or accessing limited information.
If Mitigated
With proper physical security controls and updated firmware, the risk is significantly reduced to minimal impact.
🎯 Exploit Status
Exploitation requires visual access to the device and specific laser injection techniques.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: AIS-BW80H-00 9.0.3.4(H100SP13C00) or later
Vendor Advisory: https://www.huawei.com/en/psirt/security-advisories/huawei-sa-20220126-01-df75863e-en
Restart Required: Yes
Instructions:
1. Download firmware version 9.0.3.4(H100SP13C00) or later from Huawei support. 2. Follow Huawei's firmware update procedure for AIS-BW80H-00 devices. 3. Reboot the device after update completion.
🔧 Temporary Workarounds
Physical Security Controls
allRestrict physical and visual access to vulnerable devices
Disable Voice Commands
allIf supported, disable voice command functionality on the device
🧯 If You Can't Patch
- Implement strict physical security controls to prevent visual access to devices
- Place devices in secure locations with limited line-of-sight access
🔍 How to Verify
Check if Vulnerable:
Check device firmware version via device management interface or consoleCheck Version:
Check via device web interface or console (specific command varies by device configuration)Verify Fix Applied:
Verify firmware version is 9.0.3.4(H100SP13C00) or later📡 Detection & Monitoring
Log Indicators:
- Unexpected voice command activations
- Firmware version changes
- Device reboot events
Network Indicators:
- Unusual device communication patterns
SIEM Query:
Device logs showing voice command execution without user interaction