CVE-2024-56438
📋 TL;DR
This vulnerability in Huawei's HUKS (Hardware Unified Key Store) module allows improper memory address protection, potentially leading to denial of service conditions. It affects Huawei devices using vulnerable HUKS implementations. The vulnerability impacts availability but not confidentiality or integrity.
💻 Affected Systems
- Huawei devices with HUKS module
📦 What is this software?
Emui by Huawei
Harmonyos by Huawei
Harmonyos by Huawei
Harmonyos by Huawei
⚠️ Risk & Real-World Impact
Worst Case
Complete system crash or device reboot, rendering the device temporarily unusable until manual intervention.
Likely Case
Application crashes or instability in cryptographic operations when HUKS is accessed under specific conditions.
If Mitigated
Minimal impact with proper memory protection mechanisms and updated software.
🎯 Exploit Status
Exploitation likely requires local access or malicious application with specific permissions to trigger memory issues.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Refer to 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. 2. Apply the latest security update via Settings > System & updates > Software update. 3. Restart device after update installation.
🔧 Temporary Workarounds
Restrict application permissions
allLimit which applications can access cryptographic functions via HUKS to reduce attack surface.
Monitor system stability
allWatch for application crashes related to cryptographic operations and investigate suspicious behavior.
🧯 If You Can't Patch
- Isolate affected devices from critical networks to limit potential denial of service impact.
- Implement application allowlisting to prevent unauthorized applications from accessing HUKS functionality.
🔍 How to Verify
Check if Vulnerable:
Check device security patch level in Settings > About phone > Build number and compare with Huawei security bulletin.Check Version:
Settings > About phone > Build number (no CLI command available for consumer devices)Verify Fix Applied:
Verify security patch date is after the fix release date in Huawei advisory.📡 Detection & Monitoring
Log Indicators:
- Unexpected application crashes during cryptographic operations
- System logs showing memory protection violations
Network Indicators:
- None - this is a local vulnerability
SIEM Query:
Not applicable for typical consumer device monitoring