CVE-2024-56436
📋 TL;DR
This CVE describes a cross-process screen stack vulnerability in Huawei's UIExtension module that could allow unauthorized access to screen content across application boundaries. It affects Huawei devices running vulnerable versions of their software. The vulnerability primarily impacts service confidentiality by potentially exposing sensitive screen information.
💻 Affected Systems
- Huawei devices with UIExtension module
📦 What is this software?
Harmonyos by Huawei
⚠️ Risk & Real-World Impact
Worst Case
Attackers could capture sensitive screen content from other applications, potentially exposing authentication credentials, personal data, or confidential business information displayed on screen.
Likely Case
Limited information leakage from background applications or system UI elements, potentially exposing some user interface elements or partial screen content.
If Mitigated
With proper application sandboxing and process isolation controls, exploitation would be limited to specific contexts with minimal data exposure.
🎯 Exploit Status
Exploitation requires local application execution or malware presence on the device. No public exploit code is mentioned in the provided information.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check Huawei security bulletin for specific patched versions
Vendor Advisory: https://consumer.huawei.com/en/support/bulletin/2025/1/
Restart Required: Yes
Instructions:
1. Check Huawei security bulletin for affected device models and versions. 2. Apply the latest security update from Huawei's official update channels. 3. Restart device after update installation. 4. Verify update was successful through device settings.
🔧 Temporary Workarounds
Application permission restrictions
allRestrict unnecessary application permissions and review app security settings to limit potential attack surface
Disable unnecessary UI extensions
allReview and disable non-essential UI extension features in device settings
🧯 If You Can't Patch
- Implement strict application vetting and only install apps from trusted sources
- Use device management solutions to restrict application permissions and monitor for suspicious behavior
🔍 How to Verify
Check if Vulnerable:
Check device software version against Huawei's security bulletin for affected versionsCheck Version:
Settings > About phone > Software information (exact path may vary by device)Verify Fix Applied:
Verify device is running a version later than those listed in Huawei's security advisory📡 Detection & Monitoring
Log Indicators:
- Unusual cross-process UI access attempts
- Abnormal screen capture or content access patterns
Network Indicators:
- Not applicable - local vulnerability
SIEM Query:
Not applicable for typical SIEM deployments as this is a local device vulnerability