CVE-2021-22483
📋 TL;DR
This CVE describes an IP address spoofing vulnerability in Huawei smartphones that allows attackers to send malicious network packets. Successful exploitation can cause denial of service (DoS) conditions on affected devices. The vulnerability affects Huawei smartphone users with unpatched devices.
💻 Affected Systems
- Huawei smartphones
📦 What is this software?
Emui by Huawei
Emui by Huawei
Magic Ui by Huawei
Magic Ui by Huawei
⚠️ Risk & Real-World Impact
Worst Case
Complete device unavailability due to sustained DoS attack, potentially requiring factory reset to restore functionality.
Likely Case
Temporary service disruption or device instability requiring reboot to restore normal operation.
If Mitigated
Minimal impact with proper network segmentation and updated devices.
🎯 Exploit Status
IP spoofing attacks typically require network access but no authentication to the device itself.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check Huawei security updates for July 2021 and later
Vendor Advisory: https://consumer.huawei.com/en/support/bulletin/2021/7/
Restart Required: Yes
Instructions:
1. Check for system updates in device Settings. 2. Install latest security update. 3. Restart device after installation.
🔧 Temporary Workarounds
Network segmentation
allIsolate vulnerable devices from untrusted networks
Disable unnecessary network services
allTurn off Wi-Fi, Bluetooth when not needed
🧯 If You Can't Patch
- Restrict device to trusted Wi-Fi networks only
- Use VPN when connecting to public networks
🔍 How to Verify
Check if Vulnerable:
Check device security patch level in Settings > About phone > Build numberCheck Version:
Not applicable - check through device settings UIVerify Fix Applied:
Verify security patch date is July 2021 or later📡 Detection & Monitoring
Log Indicators:
- Unusual network traffic patterns
- Multiple connection attempts from spoofed IPs
Network Indicators:
- Abnormal packet rates to mobile devices
- IP spoofing attempts in network traffic
SIEM Query:
Not specifically applicable for mobile device DoS detection