CVE-2023-44103
📋 TL;DR
This CVE describes an out-of-bounds read vulnerability in Huawei's Bluetooth module that could allow attackers to read sensitive information from memory. It affects Huawei devices running HarmonyOS and certain Android-based systems. Successful exploitation could compromise service confidentiality.
💻 Affected Systems
- Huawei smartphones
- Huawei tablets
- Huawei wearables with Bluetooth
📦 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
⚠️ Risk & Real-World Impact
Worst Case
Attackers could read sensitive data from device memory, potentially exposing authentication tokens, encryption keys, or other confidential information stored in Bluetooth-related processes.
Likely Case
Information disclosure of limited memory contents, potentially revealing device identifiers, connection data, or other Bluetooth-related information.
If Mitigated
With proper network segmentation and Bluetooth restrictions, impact is limited to isolated network segments with minimal sensitive data exposure.
🎯 Exploit Status
Exploitation requires proximity or network access to Bluetooth interface. No public exploit code has been identified.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: October 2023 security patches for HarmonyOS
Vendor Advisory: https://consumer.huawei.com/en/support/bulletin/2023/10/
Restart Required: Yes
Instructions:
1. Check for system updates in device settings. 2. Install October 2023 security update. 3. Restart device after installation completes.
🔧 Temporary Workarounds
Disable Bluetooth
allTurn off Bluetooth when not in use to prevent exploitation
Restrict Bluetooth visibility
allSet Bluetooth to non-discoverable mode to reduce attack surface
🧯 If You Can't Patch
- Segment network to isolate Bluetooth-enabled devices from sensitive systems
- Implement strict Bluetooth usage policies and monitoring for unusual Bluetooth activity
🔍 How to Verify
Check if Vulnerable:
Check device security patch level in Settings > About phone > Build number. If before October 2023, device is vulnerable.Check Version:
Settings > About phone > Build number (GUI only, no CLI command)Verify Fix Applied:
Verify security patch level shows October 2023 or later in device settings📡 Detection & Monitoring
Log Indicators:
- Unusual Bluetooth connection attempts
- Bluetooth service crashes or errors
- Memory access violations in Bluetooth processes
Network Indicators:
- Suspicious Bluetooth pairing requests
- Unusual Bluetooth traffic patterns
SIEM Query:
source="bluetooth" AND (event_type="error" OR event_type="crash")🔗 References
- https://consumer.huawei.com/en/support/bulletin/2023/10/
- https://device.harmonyos.com/en/docs/security/update/security-bulletins-202310-0000001663676540
- https://consumer.huawei.com/en/support/bulletin/2023/10/
- https://device.harmonyos.com/en/docs/security/update/security-bulletins-202310-0000001663676540
