CVE-2021-22313
📋 TL;DR
This Huawei smartphone security function vulnerability allows attackers to compromise data confidentiality when exploited. The vulnerability affects Huawei smartphone users running specific software versions. Successful exploitation could lead to unauthorized access to sensitive information stored on the device.
💻 Affected Systems
- Huawei smartphones
📦 What is this software?
Emui by Huawei
Emui by Huawei
Emui by Huawei
Emui by Huawei
Magic Ui by Huawei
Magic Ui by Huawei
Magic Ui by Huawei
⚠️ Risk & Real-World Impact
Worst Case
Complete compromise of all user data including personal information, authentication credentials, and sensitive files stored on the device.
Likely Case
Targeted data exfiltration of specific sensitive information such as contacts, messages, or app data.
If Mitigated
Limited data exposure due to encryption or access controls preventing full system compromise.
🎯 Exploit Status
Exploitation likely requires some level of access or interaction with the device; no public exploit code available
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Specific patch versions detailed in Huawei security bulletins
Vendor Advisory: https://consumer.huawei.com/en/support/bulletin/2021/2/
Restart Required: Yes
Instructions:
1. Check for available updates in Settings > System & updates > Software update. 2. Download and install the latest security patch. 3. Restart device after installation completes.
🔧 Temporary Workarounds
Disable unnecessary permissions
allReview and restrict app permissions to minimize attack surface
Enable device encryption
allEnsure device encryption is active to protect data at rest
🧯 If You Can't Patch
- Isolate affected devices from sensitive networks and data
- Implement mobile device management (MDM) controls to restrict data access
🔍 How to Verify
Check if Vulnerable:
Check device software version in Settings > About phone > Build number and compare against Huawei's security bulletinCheck Version:
Settings > About phone > Build numberVerify Fix Applied:
Verify software version has been updated to a version beyond those listed in the vulnerability bulletin📡 Detection & Monitoring
Log Indicators:
- Unusual permission requests
- Security function failures
- Unexpected data access patterns
Network Indicators:
- Suspicious data exfiltration patterns from mobile devices
SIEM Query:
device_type="mobile" AND (event_category="security_violation" OR data_transfer_size>threshold)