CVE-2022-48355
📋 TL;DR
This CVE describes a heap out-of-bounds read vulnerability in Huawei Bluetooth modules. Successful exploitation can cause the Bluetooth process to crash, potentially disrupting Bluetooth functionality on affected devices. This affects Huawei devices running HarmonyOS with vulnerable Bluetooth firmware.
💻 Affected Systems
- Huawei smartphones
- Huawei tablets
- Huawei wearables with Bluetooth
📦 What is this software?
Emui by Huawei
Emui by Huawei
Harmonyos by Huawei
Harmonyos by Huawei
Harmonyos by Huawei
Harmonyos by Huawei
⚠️ Risk & Real-World Impact
Worst Case
Denial of service causing Bluetooth functionality to become unavailable, potentially requiring device restart to restore functionality.
Likely Case
Bluetooth process crash leading to temporary loss of Bluetooth connectivity until process restarts.
If Mitigated
Minimal impact with proper patching; Bluetooth functionality remains stable.
🎯 Exploit Status
Exploitation requires proximity to target device via Bluetooth and specific malformed packets.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: HarmonyOS security updates released March 2023
Vendor Advisory: https://consumer.huawei.com/en/support/bulletin/2023/3/
Restart Required: Yes
Instructions:
1. Check for system updates in device Settings. 2. Install available security updates. 3. Restart device after installation.
🔧 Temporary Workarounds
Disable Bluetooth
allTemporarily disable Bluetooth to prevent exploitation
Enable Airplane Mode
allDisable all wireless communications including Bluetooth
🧯 If You Can't Patch
- Disable Bluetooth when not in use
- Limit Bluetooth visibility to trusted devices only
🔍 How to Verify
Check if Vulnerable:
Check HarmonyOS version in Settings > About phone > HarmonyOS version. If version predates March 2023 security updates, device may be vulnerable.Check Version:
Settings > About phone > HarmonyOS versionVerify Fix Applied:
Verify HarmonyOS version includes March 2023 security updates in Settings > About phone > HarmonyOS version.📡 Detection & Monitoring
Log Indicators:
- Bluetooth service crashes
- Bluetooth process termination logs
- Bluetooth connectivity failures
Network Indicators:
- Unusual Bluetooth connection attempts
- Malformed Bluetooth packets
SIEM Query:
Not applicable - local device vulnerability🔗 References
- https://consumer.huawei.com/en/support/bulletin/2023/3/
- https://device.harmonyos.com/en/docs/security/update/security-bulletins-202303-0000001529824505
- https://consumer.huawei.com/en/support/bulletin/2023/3/
- https://device.harmonyos.com/en/docs/security/update/security-bulletins-202303-0000001529824505
