CVE-2021-46883
📋 TL;DR
This CVE describes a buffer overflow vulnerability in Huawei video framework caused by addition overflow. Successful exploitation could allow attackers to crash affected systems, affecting availability. This affects Huawei devices running vulnerable video framework components.
💻 Affected Systems
- Huawei smartphones and tablets with affected video framework
📦 What is this software?
Emui by Huawei
Emui by Huawei
Emui by Huawei
Emui by Huawei
Emui by Huawei
⚠️ Risk & Real-World Impact
Worst Case
Complete system crash or denial of service, potentially leading to device instability requiring reboot.
Likely Case
Application crash or system instability affecting video functionality.
If Mitigated
Minimal impact with proper memory protection mechanisms and exploit mitigations in place.
🎯 Exploit Status
Exploitation requires crafting malicious video files and getting user to process them; no public exploit code known.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check Huawei security updates for specific device models and firmware versions.
Vendor Advisory: https://consumer.huawei.com/en/support/bulletin/2023/5/
Restart Required: Yes
Instructions:
1. Check for security updates in device settings. 2. Install latest firmware update from Huawei. 3. Reboot device after update completes.
🔧 Temporary Workarounds
Disable automatic video processing
allPrevent automatic processing of video files from untrusted sources.
Use trusted video sources only
allAvoid opening video files from unknown or untrusted sources.
🧯 If You Can't Patch
- Isolate affected devices from processing untrusted video content
- Implement network segmentation to limit potential attack vectors
🔍 How to Verify
Check if Vulnerable:
Check device firmware version against Huawei security bulletins; vulnerability exists in specific video framework versions.Check Version:
Settings > About phone > Build number (on Huawei Android devices)Verify Fix Applied:
Verify device has installed latest security update from Huawei and firmware version matches patched versions.📡 Detection & Monitoring
Log Indicators:
- Application crashes in video processing apps
- Memory violation errors in system logs
Network Indicators:
- Unusual video file downloads to affected devices
SIEM Query:
Search for application crashes involving video processing components or memory violation errors on Huawei devices.