CVE-2023-46774
📋 TL;DR
This vulnerability involves uncaught exceptions in the NFC module that can be exploited to affect NFC availability on Huawei devices running HarmonyOS. Successful exploitation could cause NFC functionality to become unavailable, impacting devices that rely on NFC for contactless payments, access control, or data transfer. The vulnerability affects Huawei smartphones and tablets with specific HarmonyOS versions.
💻 Affected Systems
- Huawei smartphones
- Huawei tablets
📦 What is this software?
Emui by Huawei
Emui by Huawei
Emui by Huawei
Emui by Huawei
Harmonyos by Huawei
Harmonyos by Huawei
Harmonyos by Huawei
Harmonyos by Huawei
Harmonyos by Huawei
Harmonyos by Huawei
⚠️ Risk & Real-World Impact
Worst Case
Complete denial of NFC service on affected devices, preventing contactless payments, access control, and data transfer functionality until device restart or patch application.
Likely Case
Temporary disruption of NFC functionality requiring device restart to restore service.
If Mitigated
Minimal impact with proper patching; NFC functionality remains available with normal operation.
🎯 Exploit Status
Exploitation requires physical proximity or malicious NFC interaction; no authentication required to trigger the vulnerability.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: HarmonyOS security patch November 2023 or later
Vendor Advisory: https://consumer.huawei.com/en/support/bulletin/2023/11/
Restart Required: Yes
Instructions:
1. Navigate to Settings > System & updates > Software update. 2. Check for updates. 3. Install the November 2023 security patch or later. 4. Restart device after installation.
🔧 Temporary Workarounds
Disable NFC temporarily
allTurn off NFC functionality to prevent exploitation until patch can be applied
Settings > More connections > NFC > Toggle OFF
🧯 If You Can't Patch
- Disable NFC functionality in device settings
- Restrict physical access to devices and monitor for NFC service disruptions
🔍 How to Verify
Check if Vulnerable:
Check HarmonyOS version: Settings > About phone > HarmonyOS version. If version is prior to November 2023 security patch, device is vulnerable.Check Version:
Settings > About phone > HarmonyOS versionVerify Fix Applied:
Verify HarmonyOS version shows November 2023 security patch or later, then test NFC functionality with a contactless payment or data transfer.📡 Detection & Monitoring
Log Indicators:
- NFC service crash logs
- System logs showing NFC module exceptions
- Application logs reporting NFC failures
Network Indicators:
- Unusual NFC transaction patterns
- Multiple NFC service restart attempts
SIEM Query:
source="device_logs" AND ("NFC" AND ("crash" OR "exception" OR "unavailable"))🔗 References
- https://consumer.huawei.com/en/support/bulletin/2023/11/
- https://device.harmonyos.com/en/docs/security/update/security-bulletins-202311-0000001729189597
- https://consumer.huawei.com/en/support/bulletin/2023/11/
- https://device.harmonyos.com/en/docs/security/update/security-bulletins-202311-0000001729189597
