CVE-2022-31753
📋 TL;DR
This CVE describes a format string vulnerability in the voice wakeup module of Huawei/HarmonyOS devices. Attackers can exploit this by providing malicious format strings, potentially causing denial of service or arbitrary code execution. Affected users include those with Huawei smartphones and other devices running vulnerable HarmonyOS versions.
💻 Affected Systems
- Huawei smartphones
- HarmonyOS devices with voice wakeup
📦 What is this software?
Emui by Huawei
Emui by Huawei
Emui by Huawei
Emui by Huawei
Emui by Huawei
Harmonyos by Huawei
Magic Ui by Huawei
Magic Ui by Huawei
Magic Ui by Huawei
⚠️ Risk & Real-World Impact
Worst Case
Remote code execution leading to complete system compromise, data theft, or persistent backdoor installation.
Likely Case
Denial of service causing device instability, crashes, or voice wakeup feature malfunction.
If Mitigated
Limited impact with proper input validation and format string sanitization in place.
🎯 Exploit Status
Exploitation requires triggering the voice wakeup module with malicious input.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: HarmonyOS security updates from June 2022 onward
Vendor Advisory: https://consumer.huawei.com/en/support/bulletin/2022/6/
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 voice wakeup
allTemporarily disable the vulnerable voice wakeup feature
🧯 If You Can't Patch
- Restrict physical access to vulnerable devices
- Implement network segmentation to limit attack surface
🔍 How to Verify
Check if Vulnerable:
Check HarmonyOS version in Settings > About phone > HarmonyOS versionCheck Version:
Not applicable - check via device settings UIVerify Fix Applied:
Verify installed security patch level includes June 2022 or later updates📡 Detection & Monitoring
Log Indicators:
- Voice wakeup module crashes
- Unexpected format string processing errors
Network Indicators:
- Unusual voice command traffic patterns
SIEM Query:
Not applicable - device-level vulnerability🔗 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
