CVE-2021-22319
📋 TL;DR
CVE-2021-22319 is an integer overflow vulnerability in Huawei smartphones that occurs due to improper input validation. Successful exploitation could allow attackers to execute arbitrary code or cause denial of service. This affects Huawei smartphones running HarmonyOS or EMUI.
💻 Affected Systems
- Huawei smartphones
📦 What is this software?
Emui by Huawei
Emui by Huawei
Emui by Huawei
Emui by Huawei
Harmonyos by Huawei
Magic Ui by Huawei
Magic Ui by Huawei
Magic Ui by Huawei
⚠️ Risk & Real-World Impact
Worst Case
Remote code execution leading to complete device compromise, data theft, or persistent backdoor installation.
Likely Case
Application crash or denial of service affecting device functionality.
If Mitigated
No impact if patched or if exploit attempts are blocked by security controls.
🎯 Exploit Status
Exploitation likely requires local access or malicious app installation. No public exploit code available.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: HarmonyOS 2.0.0.230 or later, EMUI with October 2021 security patches
Vendor Advisory: https://consumer.huawei.com/en/support/bulletin/2021/10/
Restart Required: Yes
Instructions:
1. Check for system updates in Settings > System & updates > Software update. 2. Download and install available updates. 3. Restart device when prompted.
🔧 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
🧯 If You Can't Patch
- Isolate affected devices from critical networks
- Implement mobile device management with strict app control policies
🔍 How to Verify
Check if Vulnerable:
Check Settings > About phone > HarmonyOS version or EMUI version against patched versionsCheck Version:
Settings > About phone > Software informationVerify Fix Applied:
Verify version is HarmonyOS 2.0.0.230+ or EMUI with October 2021+ security patches📡 Detection & Monitoring
Log Indicators:
- Unexpected app crashes
- Memory allocation failures
- Security service anomalies
Network Indicators:
- Unusual outbound connections from mobile devices
- Suspicious app behavior patterns
SIEM Query:
device.os.name:HarmonyOS AND event.action:crash AND NOT app.name:whitelisted_apps🔗 References
- https://consumer.huawei.com/en/support/bulletin/2021/10/
- https://device.harmonyos.com/en/docs/security/update/security-bulletins-phones-202109-0000001150310956
- https://consumer.huawei.com/en/support/bulletin/2021/10/
- https://device.harmonyos.com/en/docs/security/update/security-bulletins-phones-202109-0000001150310956
