CVE-2021-22442
📋 TL;DR
This vulnerability in Huawei smartphones allows attackers to bypass integrity checks, potentially causing system resets. It affects Huawei smartphone users who haven't applied security patches. The flaw stems from improper validation of integrity check values in the system.
💻 Affected Systems
- Huawei smartphones
📦 What is this software?
Emui by Huawei
Emui by Huawei
Emui by Huawei
Emui by Huawei
Emui by Huawei
Emui by Huawei
Magic Ui by Huawei
Magic Ui by Huawei
Magic Ui by Huawei
Magic Ui by Huawei
Magic Ui by Huawei
⚠️ Risk & Real-World Impact
Worst Case
Persistent denial of service through repeated system resets, potentially leading to data loss or device instability.
Likely Case
Temporary denial of service causing device reboots and disruption of user activities.
If Mitigated
No impact if patched; unpatched devices remain vulnerable to system resets.
🎯 Exploit Status
Exploitation requires triggering the improper validation, but specific exploit details aren't publicly documented in the provided references.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Patches included in Huawei's June 2021 security updates
Vendor Advisory: https://consumer.huawei.com/en/support/bulletin/2021/6/
Restart Required: Yes
Instructions:
1. Check for available system updates in device settings. 2. Install the June 2021 security update from Huawei. 3. Reboot the device after installation.
🧯 If You Can't Patch
- Limit device exposure to untrusted networks or inputs that could trigger the vulnerability.
- Monitor device behavior for unexpected resets and consider temporary replacement if critical.
🔍 How to Verify
Check if Vulnerable:
Check if device has received the June 2021 security update via Settings > System & updates > Software update.Check Version:
Not applicable for typical users; check via device settings as above.Verify Fix Applied:
Confirm installation of June 2021 security patch in Settings > About phone > Build number or security patch level.📡 Detection & Monitoring
Log Indicators:
- Unexpected system reboots or resets in device logs
- Integrity check failures in system logs
Network Indicators:
- Unusual network traffic patterns preceding device resets
SIEM Query:
Not specifically provided; monitor for device reboot events correlated with potential exploit attempts.