CVE-2021-46881
📋 TL;DR
This CVE describes a buffer overflow vulnerability in Huawei video framework caused by addition overflow. Attackers could exploit this to overwrite memory and potentially crash affected systems, affecting availability. Huawei device users with vulnerable video framework versions are affected.
💻 Affected Systems
- Huawei devices with vulnerable 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 video framework malfunction causing degraded functionality
If Mitigated
Minimal impact with proper memory protection mechanisms and exploit mitigations in place
🎯 Exploit Status
Exploitation requires specific video processing conditions; no public exploit details available
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check Huawei security bulletins for specific patched versions
Vendor Advisory: https://consumer.huawei.com/en/support/bulletin/2023/5/
Restart Required: Yes
Instructions:
1. Check Huawei security bulletin for affected device models. 2. Apply latest security updates via Settings > System & updates > Software update. 3. Restart device after update completes.
🔧 Temporary Workarounds
Disable unnecessary video processing
allReduce attack surface by limiting video framework usage
Memory protection enforcement
allEnable ASLR and other memory protection features if available
🧯 If You Can't Patch
- Isolate affected devices from untrusted networks
- Monitor for abnormal video framework crashes or memory usage patterns
🔍 How to Verify
Check if Vulnerable:
Check device model and software version against Huawei security bulletinsCheck Version:
Settings > About phone > Build number / Software versionVerify Fix Applied:
Verify software version matches or exceeds patched version in Huawei advisory📡 Detection & Monitoring
Log Indicators:
- Video framework crash logs
- Abnormal memory access patterns in system logs
Network Indicators:
- Unusual video streaming patterns to vulnerable devices
SIEM Query:
Search for video framework process crashes or memory violation events