CVE-2021-46812
📋 TL;DR
This vulnerability in Huawei Device Manager allows attackers to compromise data integrity during multi-device interactions. It affects Huawei devices running HarmonyOS. Successful exploitation could allow unauthorized data manipulation between connected devices.
💻 Affected Systems
- Huawei smartphones and tablets with Device Manager functionality
📦 What is this software?
Emui by Huawei
Harmonyos by Huawei
⚠️ Risk & Real-World Impact
Worst Case
Attackers could manipulate or corrupt data being transferred between devices, potentially leading to data loss, system instability, or unauthorized access to sensitive information.
Likely Case
Data integrity issues during device synchronization or file transfers, potentially causing corrupted files or inconsistent data across devices.
If Mitigated
With proper network segmentation and device authentication, impact would be limited to isolated incidents with minimal data loss.
🎯 Exploit Status
Requires proximity or network access to target devices, likely needs some level of device interaction
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: June 2022 security patch or later
Vendor Advisory: https://consumer.huawei.com/en/support/bulletin/2022/6/
Restart Required: Yes
Instructions:
1. Check for system updates in Settings > System & updates > Software update. 2. Install June 2022 security patch or later. 3. Restart device after installation.
🔧 Temporary Workarounds
Disable multi-device features
allTemporarily disable Device Manager multi-device interaction features
Network isolation
allIsolate vulnerable devices from untrusted networks
🧯 If You Can't Patch
- Disable all multi-device interaction features in Device Manager settings
- Implement network segmentation to isolate vulnerable devices from critical systems
🔍 How to Verify
Check if Vulnerable:
Check HarmonyOS version in Settings > About phone > HarmonyOS version. If version is before June 2022 security patch, device is vulnerable.Check Version:
Settings > About phone > HarmonyOS versionVerify Fix Applied:
Verify HarmonyOS version shows June 2022 security patch or later in Settings > About phone > HarmonyOS version📡 Detection & Monitoring
Log Indicators:
- Unexpected device pairing attempts
- Abnormal data transfer patterns between devices
- Device Manager error logs related to multi-device operations
Network Indicators:
- Unusual network traffic between Huawei devices
- Suspicious Bluetooth or Wi-Fi Direct connections
SIEM Query:
Device logs showing unexpected multi-device interaction events or failed authentication attempts in Device Manager🔗 References
- https://consumer.huawei.com/en/support/bulletin/2022/6/
- https://device.harmonyos.com/en/docs/security/update/security-bulletins-phones-202206-0000001270350482
- https://consumer.huawei.com/en/support/bulletin/2022/6/
- https://device.harmonyos.com/en/docs/security/update/security-bulletins-phones-202206-0000001270350482
