CVE-2020-9094
📋 TL;DR
This CVE describes an out-of-bounds read vulnerability in Huawei CloudEngine products. Attackers can exploit it by sending malicious packets, potentially causing denial of service. Organizations using affected Huawei CloudEngine versions are at risk.
💻 Affected Systems
- Huawei CloudEngine series switches
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete system crash leading to extended service disruption and potential data corruption
Likely Case
Service instability or temporary denial of service requiring system restart
If Mitigated
Minimal impact with proper network segmentation and monitoring
🎯 Exploit Status
Exploitation requires sending crafted packets to vulnerable module
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Refer to Huawei security advisory for specific patched versions
Vendor Advisory: https://www.huawei.com/en/psirt/security-advisories/huawei-sa-20201216-01-obr-en
Restart Required: Yes
Instructions:
1. Check Huawei advisory for affected versions 2. Download appropriate patch from Huawei support 3. Apply patch following Huawei documentation 4. Restart affected devices
🔧 Temporary Workarounds
Network segmentation
allRestrict network access to CloudEngine management interfaces
Access control lists
allImplement ACLs to filter suspicious packets
🧯 If You Can't Patch
- Isolate affected devices in separate network segments
- Implement strict network monitoring for anomalous packet patterns
🔍 How to Verify
Check if Vulnerable:
Check device version against Huawei advisory list of affected versionsCheck Version:
display version (Huawei CLI command)Verify Fix Applied:
Verify patch installation and confirm version is no longer in affected range📡 Detection & Monitoring
Log Indicators:
- System crash logs
- Module failure messages
- Unexpected process termination
Network Indicators:
- Malformed packets to CloudEngine devices
- Unusual traffic patterns to switch management interfaces
SIEM Query:
source_ip=* AND dest_ip=CloudEngine_IP AND (packet_size_anomaly OR protocol_violation)