CVE-2021-22416
📋 TL;DR
This CVE describes a data processing error vulnerability in HarmonyOS that allows local attackers to execute arbitrary kernel code. The vulnerability affects Huawei devices running vulnerable versions of HarmonyOS. Successful exploitation could lead to complete system compromise.
💻 Affected Systems
- Huawei HarmonyOS
📦 What is this software?
Harmonyos by Huawei
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise with kernel-level code execution, allowing attackers to bypass all security controls, install persistent malware, and access all system resources.
Likely Case
Local privilege escalation allowing attackers to gain elevated privileges and potentially access sensitive data or install malicious software.
If Mitigated
Limited impact with proper patch management and security controls in place, though local attackers could still attempt exploitation.
🎯 Exploit Status
Requires local access to the device. Kernel code execution vulnerabilities typically require some technical sophistication to exploit reliably.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Security update June 2021
Vendor Advisory: https://device.harmonyos.com/cn/docs/security/update/oem_security_update_phone_202106-0000001165452077
Restart Required: Yes
Instructions:
1. Check for available system updates in device settings. 2. Apply the June 2021 security update. 3. Restart the device after installation completes.
🔧 Temporary Workarounds
Restrict local access
allLimit physical and local access to vulnerable devices to reduce attack surface
🧯 If You Can't Patch
- Isolate affected devices from critical networks and sensitive data
- Implement strict access controls and monitoring for local device access
🔍 How to Verify
Check if Vulnerable:
Check HarmonyOS version in device settings > About phone > HarmonyOS versionCheck Version:
Settings > About phone > HarmonyOS versionVerify Fix Applied:
Verify HarmonyOS version is updated to include June 2021 security patches📡 Detection & Monitoring
Log Indicators:
- Unusual kernel module loading
- Unexpected privilege escalation attempts
- Suspicious local process execution
Network Indicators:
- Not applicable - local vulnerability
SIEM Query:
Not applicable for local kernel vulnerabilities without specific exploit signatures