CVE-2021-22317
📋 TL;DR
An information disclosure vulnerability in certain Huawei smartphones allows unauthorized access to sensitive data. This affects users of specific Huawei smartphone models running vulnerable software versions. The vulnerability could expose personal or device data to attackers.
💻 Affected Systems
- Huawei smartphones
📦 What is this software?
Emui by Huawei
Magic Ui by Huawei
⚠️ Risk & Real-World Impact
Worst Case
Complete compromise of personal data including contacts, messages, photos, and authentication credentials stored on the device.
Likely Case
Exposure of some device configuration data or limited personal information accessible through the vulnerability vector.
If Mitigated
No data exposure if device is patched or workarounds are implemented.
🎯 Exploit Status
Limited public information available. Exploitation likely requires some level of access or interaction with the device.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check Huawei security updates for specific patched versions
Vendor Advisory: https://consumer.huawei.com/en/support/bulletin/2021/2/
Restart Required: Yes
Instructions:
1. Check for security updates in device Settings > System & updates > Software update. 2. Install any available security patches. 3. Restart device after update completes.
🔧 Temporary Workarounds
Limit app permissions
allRestrict unnecessary app permissions that might exploit this vulnerability
Disable unnecessary services
allTurn off Bluetooth, NFC, and other connectivity services when not in use
🧯 If You Can't Patch
- Isolate device from untrusted networks and Bluetooth connections
- Implement mobile device management (MDM) with strict security policies
🔍 How to Verify
Check if Vulnerable:
Check device security patch level in Settings > About phone > Build number and compare with Huawei security bulletinsCheck Version:
Settings > About phone > EMUI version / Android versionVerify Fix Applied:
Verify security patch date is after February 2021 and matches patched versions in Huawei advisory📡 Detection & Monitoring
Log Indicators:
- Unusual data access patterns
- Unexpected permission requests from apps
Network Indicators:
- Suspicious data exfiltration from device
SIEM Query:
Device logs showing unauthorized access attempts to protected data areas