CVE-2020-9139
📋 TL;DR
This vulnerability in certain Huawei smartphones allows attackers to trigger memory access errors and denial of service through improper input validation. It affects specific Huawei smartphone models running vulnerable software versions. Successful exploitation could crash affected devices or potentially lead to more severe impacts.
💻 Affected Systems
- Huawei smartphones
📦 What is this software?
Emui by Huawei
Emui by Huawei
Emui by Huawei
Emui by Huawei
Emui by Huawei
Emui by Huawei
Magic Ui by Huawei
Magic Ui by Huawei
Magic Ui by Huawei
Magic Ui by Huawei
Magic Ui by Huawei
⚠️ Risk & Real-World Impact
Worst Case
Complete device crash requiring reboot, potential for remote code execution if combined with other vulnerabilities, or persistent denial of service.
Likely Case
Application or system crashes causing temporary denial of service, requiring device restart to restore functionality.
If Mitigated
Minimal impact with proper input validation and memory protection mechanisms in place.
🎯 Exploit Status
Exploitation requires sending specially crafted input to vulnerable components; complexity depends on specific attack vector
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Refer to Huawei security updates for December 2020
Vendor Advisory: https://consumer.huawei.com/en/support/bulletin/2020/12/
Restart Required: Yes
Instructions:
1. Check for available security updates in device settings. 2. Install the latest security patch from Huawei. 3. Restart device after installation.
🔧 Temporary Workarounds
Disable unnecessary services
allReduce attack surface by disabling unused network services and applications
Network segmentation
allIsolate affected devices from untrusted networks
🧯 If You Can't Patch
- Isolate affected devices from production networks
- Implement strict input validation at network perimeter
🔍 How to Verify
Check if Vulnerable:
Check device software version in Settings > About phone and compare with Huawei's December 2020 security bulletinCheck Version:
Settings > About phone > Build number/Software versionVerify Fix Applied:
Verify security patch level in Settings > About phone shows December 2020 or later security update📡 Detection & Monitoring
Log Indicators:
- Unexpected application crashes
- Memory access violation errors
- Abnormal process termination
Network Indicators:
- Unusual network traffic patterns to affected devices
- Suspicious input patterns
SIEM Query:
Search for: 'memory access error' OR 'segmentation fault' OR 'denial of service' on Huawei device logs