CVE-2021-22414
📋 TL;DR
This is a memory buffer overflow vulnerability (CWE-787) affecting Huawei smartphones. Successful exploitation could allow attackers to cause system resets or potentially execute arbitrary code. The vulnerability affects specific Huawei smartphone models running vulnerable software versions.
💻 Affected Systems
- Huawei smartphones
📦 What is this software?
Emui by Huawei
Emui by Huawei
Emui by Huawei
Emui by Huawei
Magic Ui by Huawei
⚠️ Risk & Real-World Impact
Worst Case
Remote code execution leading to complete device compromise, data theft, or persistent backdoor installation
Likely Case
System crashes, denial of service, or temporary device unavailability requiring reboot
If Mitigated
Limited impact with proper patching and security controls in place
🎯 Exploit Status
CVSS 7.5 suggests attacker needs some access/privileges but exploitation details not publicly available
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Security updates from June 2021 onward
Vendor Advisory: https://consumer.huawei.com/en/support/bulletin/2021/6/
Restart Required: Yes
Instructions:
1. Check for system updates in Settings > System & updates > Software update. 2. Download and install available security updates. 3. Restart device after installation completes.
🔧 Temporary Workarounds
Disable unnecessary features
allReduce attack surface by disabling unused apps, services, and connectivity options
Network segmentation
allIsolate affected devices from critical networks and internet access
🧯 If You Can't Patch
- Isolate affected devices from corporate networks and internet
- Implement strict access controls and monitor for unusual device behavior
🔍 How to Verify
Check if Vulnerable:
Check Settings > About phone > Build number against Huawei's June 2021 security bulletinCheck Version:
Settings > About phone > Build numberVerify Fix Applied:
Verify software version is updated beyond June 2021 security patches📡 Detection & Monitoring
Log Indicators:
- Unexpected system crashes
- Memory-related errors in system logs
- Abnormal process terminations
Network Indicators:
- Unusual network traffic from affected devices
- Connection attempts to suspicious endpoints
SIEM Query:
device.vendor:"Huawei" AND event.category:"crash" OR event.category:"memory"