CVE-2021-22302
📋 TL;DR
This is an out-of-bounds read vulnerability in certain Huawei smartphones where a module fails to properly validate input. Attackers can exploit this by sending malicious input through a specific app, potentially causing service disruption or information disclosure. Affected devices include Huawei Taurus-AL00A smartphones running specific firmware versions.
💻 Affected Systems
- Huawei Taurus-AL00A
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Information disclosure leading to sensitive data exposure, or service disruption causing denial of service
Likely Case
Application crash or service disruption affecting normal smartphone functionality
If Mitigated
Minimal impact if input validation is implemented or vulnerable component is isolated
🎯 Exploit Status
Requires malicious app installation and specific input to trigger the vulnerability
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Later versions than 10.0.0.1(C00E1R1P1)
Vendor Advisory: https://www.huawei.com/en/psirt/security-advisories/huawei-sa-20210127-01-smartphone-en
Restart Required: Yes
Instructions:
1. Check for system updates in Settings > System & updates > Software update. 2. Install available security updates. 3. Restart device after update completes.
🔧 Temporary Workarounds
App installation restrictions
androidRestrict installation of apps from unknown sources to prevent malicious app delivery
Settings > Security > Install unknown apps > Disable for all apps
App permission review
androidReview and restrict permissions for suspicious or unnecessary apps
Settings > Apps > [App Name] > Permissions > Review and disable unnecessary permissions
🧯 If You Can't Patch
- Isolate device from sensitive networks and data
- Implement mobile device management with strict app control policies
🔍 How to Verify
Check if Vulnerable:
Check device model and firmware version in Settings > About phone > Build numberCheck Version:
Settings > About phone > Build numberVerify Fix Applied:
Verify firmware version is newer than 10.0.0.1(C00E1R1P1) and check for recent security updates📡 Detection & Monitoring
Log Indicators:
- Application crashes in system logs
- Memory access violation errors
Network Indicators:
- Unusual app network traffic patterns
SIEM Query:
device_model:Huawei_Taurus-AL00A AND firmware_version:10.0.0.1* AND (event_type:crash OR memory_violation)