CVE-2024-27895
📋 TL;DR
This CVE describes a permission control vulnerability in the window module of Huawei/HarmonyOS systems. Successful exploitation could allow unauthorized access to sensitive information, affecting confidentiality. The vulnerability impacts Huawei devices running affected HarmonyOS versions.
💻 Affected Systems
- Huawei smartphones
- Huawei tablets
- HarmonyOS devices
📦 What is this software?
Harmonyos by Huawei
⚠️ Risk & Real-World Impact
Worst Case
An attacker could bypass permission controls to access sensitive application data, system information, or user data stored in window contexts, potentially leading to data leakage or privilege escalation.
Likely Case
Malicious applications could exploit this vulnerability to access data from other applications without proper authorization, violating sandbox boundaries and compromising user privacy.
If Mitigated
With proper application sandboxing and security updates, the impact is limited to specific edge cases where applications request excessive permissions.
🎯 Exploit Status
Exploitation requires a malicious application to be installed on the target device. The vulnerability involves bypassing permission checks in the window module.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: March 2024 security updates for HarmonyOS
Vendor Advisory: https://consumer.huawei.com/en/support/bulletin/2024/3/
Restart Required: Yes
Instructions:
1. Go to Settings > System & updates > Software update. 2. Check for updates. 3. Download and install the March 2024 security update. 4. Restart the device when prompted.
🔧 Temporary Workarounds
Restrict application installations
allOnly install applications from trusted sources like Huawei AppGallery
Review application permissions
allRegularly review and restrict unnecessary application permissions in device settings
🧯 If You Can't Patch
- Isolate affected devices from sensitive networks and data
- Implement strict application whitelisting policies
🔍 How to Verify
Check if Vulnerable:
Check if device has applied March 2024 security updates in Settings > System & updates > Software updateCheck Version:
Settings > About phone > HarmonyOS versionVerify Fix Applied:
Verify the security patch level includes March 2024 updates in Settings > About phone > HarmonyOS version📡 Detection & Monitoring
Log Indicators:
- Unusual permission requests in system logs
- Multiple failed permission checks from same application
Network Indicators:
- Not applicable - local vulnerability
SIEM Query:
Not applicable for typical mobile device deployments🔗 References
- https://consumer.huawei.com/en/support/bulletin/2024/3/
- https://device.harmonyos.com/en/docs/security/update/security-bulletins-202403-0000001667644725
- https://consumer.huawei.com/en/support/bulletin/2024/3/
- https://device.harmonyos.com/en/docs/security/update/security-bulletins-202403-0000001667644725
