CVE-2021-22352
📋 TL;DR
This configuration defect vulnerability in Huawei smartphones allows attackers to hijack devices and create fake user interfaces to trick users into executing malicious commands. The vulnerability affects Huawei smartphone users who haven't applied security patches. Successful exploitation could lead to complete device compromise.
💻 Affected Systems
- Huawei smartphones
📦 What is this software?
Emui by Huawei
Emui by Huawei
Emui by Huawei
Magic Ui by Huawei
Magic Ui by Huawei
⚠️ Risk & Real-World Impact
Worst Case
Complete device takeover allowing attackers to steal sensitive data, install persistent malware, monitor user activities, and use the device as part of a botnet.
Likely Case
Attackers create convincing fake login screens or system prompts to harvest credentials, install malicious apps, or gain unauthorized access to device functions.
If Mitigated
With proper security controls and user awareness, the risk is reduced to occasional phishing attempts that educated users can recognize and avoid.
🎯 Exploit Status
Exploitation requires user interaction with forged UI elements, making it a social engineering component attack
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Security updates released in May 2021 and later
Vendor Advisory: https://consumer.huawei.com/en/support/bulletin/2021/5/
Restart Required: Yes
Instructions:
1. Check for available updates in Settings > System & updates > Software update. 2. Download and install the latest security update. 3. Restart the device after installation completes.
🔧 Temporary Workarounds
Disable unknown sources installation
allPrevents installation of apps from sources other than official app stores
Settings > Security > Install unknown apps > Disable for all apps
Enable app verification
allTurns on Play Protect or Huawei's built-in app scanning
Settings > Security > Verify apps > Enable scanning
🧯 If You Can't Patch
- Educate users about recognizing suspicious UI prompts and never entering credentials in unexpected dialogs
- Implement mobile device management (MDM) policies to restrict app installations and monitor for suspicious activities
🔍 How to Verify
Check if Vulnerable:
Check if device has security patch level older than May 2021 in Settings > About phone > Build numberCheck Version:
Settings > About phone > Build number (no CLI command available)Verify Fix Applied:
Verify security patch level is May 2021 or newer in Settings > About phone📡 Detection & Monitoring
Log Indicators:
- Unusual permission requests from apps
- Multiple failed authentication attempts from unexpected sources
- Installation of apps from unknown sources
Network Indicators:
- Connections to suspicious domains shortly after user interacts with system prompts
- Unusual outbound traffic patterns
SIEM Query:
device.vendor:"Huawei" AND event.action:"app_install" AND source:"unknown"