CVE-2021-37024
📋 TL;DR
This vulnerability in Huawei smartphones allows attackers to cause kernel crashes through improper input validation. It affects Huawei devices running HarmonyOS. Successful exploitation leads to denial of service.
💻 Affected Systems
- Huawei smartphones
📦 What is this software?
Harmonyos by Huawei
⚠️ Risk & Real-World Impact
Worst Case
Persistent denial of service rendering device unusable until reboot, potentially allowing privilege escalation if combined with other vulnerabilities.
Likely Case
Temporary device crash requiring reboot, disrupting device functionality and user experience.
If Mitigated
No impact if patched or if exploit attempts are blocked by security controls.
🎯 Exploit Status
Exploitation requires local access or malicious app installation. No public exploit code identified.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: August 2021 security patch or later
Vendor Advisory: https://device.harmonyos.com/cn/docs/security/update/security-bulletins-202108-0000001180965965
Restart Required: Yes
Instructions:
1. Check for system updates in device settings. 2. Install the August 2021 security patch or later. 3. Reboot device after installation.
🔧 Temporary Workarounds
Restrict app installations
allOnly install apps from trusted sources like official app stores to reduce risk of malicious apps exploiting this vulnerability.
🧯 If You Can't Patch
- Isolate affected devices from untrusted networks and users
- Implement application allowlisting to prevent installation of untrusted apps
🔍 How to Verify
Check if Vulnerable:
Check HarmonyOS version in Settings > About phone. If version is before August 2021 security patch, device is vulnerable.Check Version:
Not applicable - check via device settings UIVerify Fix Applied:
Verify HarmonyOS version shows August 2021 security patch or later in Settings > About phone.📡 Detection & Monitoring
Log Indicators:
- Kernel panic logs
- Unexpected device reboots
- Crash reports in system logs
Network Indicators:
- No network indicators - local exploitation only
SIEM Query:
Not applicable - local kernel vulnerability