CVE-2021-37018
📋 TL;DR
This CVE describes a data processing error vulnerability in Huawei smartphones that can cause kernel crashes when exploited. The vulnerability affects Huawei devices running HarmonyOS, potentially allowing denial of service attacks. Users of affected Huawei smartphones are at risk.
💻 Affected Systems
- Huawei smartphones
📦 What is this software?
Harmonyos by Huawei
⚠️ Risk & Real-World Impact
Worst Case
Complete device instability requiring reboot, potential data loss, and denial of service
Likely Case
Device crash requiring reboot, temporary loss of device functionality
If Mitigated
No impact if patched or if exploit attempts are blocked
🎯 Exploit Status
Exploitation likely requires local access or malicious app installation
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: August 2021 security updates for HarmonyOS
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 August 2021 or later security updates. 3. Restart device after installation.
🔧 Temporary Workarounds
Restrict app installations
allOnly install apps from trusted sources like official app stores
Disable unknown sources
allPrevent installation of apps from unknown sources in device settings
🧯 If You Can't Patch
- Isolate device from untrusted networks
- Monitor for unusual device behavior or crashes
🔍 How to Verify
Check if Vulnerable:
Check HarmonyOS version in Settings > About phone > HarmonyOS versionCheck Version:
Not applicable - check through device settings interfaceVerify Fix Applied:
Verify HarmonyOS version is August 2021 or later security update📡 Detection & Monitoring
Log Indicators:
- Kernel panic logs
- Unexpected device reboots
- System crash reports
Network Indicators:
- Not network exploitable
SIEM Query:
Not applicable - local device vulnerability