CVE-2023-44108
📋 TL;DR
This CVE describes a type confusion vulnerability in Huawei's distributed file module that could allow attackers to cause denial of service through device restarts. It affects Huawei devices running HarmonyOS with the vulnerable distributed file module. The vulnerability requires local access to exploit.
💻 Affected Systems
- Huawei devices with distributed file module
📦 What is this software?
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
Persistent denial of service through repeated device restarts, potentially disrupting critical operations and causing data loss or corruption.
Likely Case
Temporary service disruption through device restart, requiring manual intervention to restore functionality.
If Mitigated
No impact if proper access controls prevent unauthorized local access to the vulnerable module.
🎯 Exploit Status
Requires local access and understanding of the distributed file module's internal workings to trigger type confusion.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: HarmonyOS security patches from October 2023
Vendor Advisory: https://consumer.huawei.com/en/support/bulletin/2023/10/
Restart Required: Yes
Instructions:
1. Check for available updates in device settings. 2. Apply the October 2023 security patch. 3. Restart the device to complete installation.
🔧 Temporary Workarounds
Disable distributed file module
allTemporarily disable the distributed file module if not required for functionality
Check device documentation for specific disable commands as they vary by device model
🧯 If You Can't Patch
- Restrict local access to devices through proper authentication and authorization controls
- Implement monitoring for unexpected device restarts and investigate root causes
🔍 How to Verify
Check if Vulnerable:
Check HarmonyOS version in device settings and compare against patched versions from October 2023Check Version:
Settings > System & updates > Software update (exact path varies by device)Verify Fix Applied:
Verify the installed security patch level includes October 2023 updates📡 Detection & Monitoring
Log Indicators:
- Unexpected device restarts
- Distributed file module crash logs
- Kernel panic or system crash events
Network Indicators:
- None - local exploitation only
SIEM Query:
EventID: 6008 OR EventID: 41 (Windows) OR kernel: panic (Linux/HarmonyOS)🔗 References
- https://consumer.huawei.com/en/support/bulletin/2023/10/
- https://https://device.harmonyos.com/en/docs/security/update/security-bulletins-202310-0000001663676540
- https://consumer.huawei.com/en/support/bulletin/2023/10/
- https://https://device.harmonyos.com/en/docs/security/update/security-bulletins-202310-0000001663676540
