CVE-2021-22384
📋 TL;DR
This CVE describes an information disclosure vulnerability in Huawei smartphones that could allow attackers to bypass authentication mechanisms. The vulnerability affects Huawei smartphone users running specific software versions, potentially exposing sensitive authentication data.
💻 Affected Systems
- Huawei smartphones
📦 What is this software?
Emui by Huawei
Magic Ui by Huawei
⚠️ Risk & Real-World Impact
Worst Case
Complete authentication bypass allowing unauthorized access to device data, applications, and potentially connected services.
Likely Case
Partial authentication bypass or unauthorized access to specific protected functions or data on the device.
If Mitigated
Limited impact with proper device security controls, but potential information leakage about authentication mechanisms.
🎯 Exploit Status
CWE-362 indicates a race condition vulnerability, suggesting exploitation requires specific timing conditions. No public exploit code was found in initial analysis.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Security updates released in June 2021
Vendor Advisory: https://consumer.huawei.com/en/support/bulletin/2021/6/
Restart Required: Yes
Instructions:
1. Check for security updates in device Settings > System & updates > Software update. 2. Download and install available security updates. 3. Restart device after installation completes.
🔧 Temporary Workarounds
Disable unnecessary authentication mechanisms
allTemporarily disable biometric or advanced authentication features that might be vulnerable
Enable enhanced security settings
allActivate all available device security features including screen lock, encryption, and app permissions
🧯 If You Can't Patch
- Isolate device from sensitive networks and data
- Implement strict access controls and monitor for unusual authentication attempts
🔍 How to Verify
Check if Vulnerable:
Check device security patch level in Settings > About phone > Build number. Devices with security patch level before June 2021 are likely vulnerable.Check Version:
Settings > About phone > Build number (no CLI command available for consumer devices)Verify Fix Applied:
Verify security patch level shows June 2021 or later in Settings > About phone > Build number📡 Detection & Monitoring
Log Indicators:
- Multiple failed authentication attempts followed by successful access
- Unusual timing patterns in authentication logs
Network Indicators:
- Unexpected authentication requests to device services
- Unusual timing in authentication protocol exchanges
SIEM Query:
Authentication events with abnormal timing patterns OR multiple rapid authentication attempts from single source