CVE-2024-42035
📋 TL;DR
A permission control vulnerability in Huawei's App Multiplier module allows unauthorized access to sensitive functionality. This affects Huawei devices running vulnerable versions of the App Multiplier software, potentially exposing user data and system functions.
💻 Affected Systems
- Huawei devices with App Multiplier module
📦 What is this software?
Emui by Huawei
Harmonyos by Huawei
Harmonyos by Huawei
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise allowing unauthorized access to all app data and functionality controlled by the App Multiplier module.
Likely Case
Unauthorized access to specific app data and functionality, potentially exposing sensitive user information.
If Mitigated
Limited impact with proper access controls and isolation in place, restricting the vulnerability's scope.
🎯 Exploit Status
Exploitation likely requires some level of app interaction or device access; no public exploit details available.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check Huawei security bulletin for specific patched versions.
Vendor Advisory: https://consumer.huawei.com/en/support/bulletin/2024/8/
Restart Required: Yes
Instructions:
1. Check Huawei security bulletin for affected devices. 2. Apply the latest security update via device settings. 3. Restart the device after update.
🔧 Temporary Workarounds
Disable App Multiplier
allTemporarily disable the App Multiplier feature to mitigate the vulnerability.
Navigate to Settings > Apps > App Multiplier > Disable
Restrict App Installations
allOnly install apps from trusted sources to reduce attack surface.
Navigate to Settings > Security > Install unknown apps > Disable for all apps
🧯 If You Can't Patch
- Isolate affected devices from sensitive networks and data.
- Implement strict app whitelisting and monitor for unusual app behavior.
🔍 How to Verify
Check if Vulnerable:
Check device settings for App Multiplier version and compare with Huawei's security bulletin.Check Version:
Settings > Apps > App Multiplier > App info > VersionVerify Fix Applied:
Verify the security patch level in Settings > About phone > Build number matches patched version.📡 Detection & Monitoring
Log Indicators:
- Unauthorized access attempts to App Multiplier APIs
- Unexpected permission requests from apps
Network Indicators:
- Unusual network traffic from App Multiplier processes
SIEM Query:
Search for events related to App Multiplier permission changes or access violations.