CVE-2019-5254
📋 TL;DR
This CVE describes an out-of-bounds read vulnerability in multiple Huawei networking products. An authenticated attacker on the internal network can send crafted messages to cause board abnormalities. Affected systems include Huawei firewalls, switches, and security modules.
💻 Affected Systems
- AP2000
- IPS Module
- NGFW Module
- NIP6300
- NIP6600
- NIP6800
- S5700
- SVN5600
- SVN5800
- SVN5800-C
- SeMG9811
- Secospace AntiDDoS8000
- Secospace USG6300
- Secospace USG6500
- Secospace USG6600
- USG6000V
- eSpace U1981
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete board failure leading to denial of service for critical network infrastructure
Likely Case
Service disruption or instability of affected networking devices
If Mitigated
Minimal impact with proper network segmentation and access controls
🎯 Exploit Status
Exploitation requires authenticated access and knowledge of inter-process messaging protocols
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check Huawei security advisory for specific fixed versions
Vendor Advisory: https://www.huawei.com/en/psirt/security-advisories/huawei-sa-20191211-01-ssp-en
Restart Required: Yes
Instructions:
1. Check Huawei security advisory for specific patch versions. 2. Download appropriate firmware updates from Huawei support portal. 3. Apply patches following Huawei's upgrade procedures. 4. Reboot affected devices as required.
🔧 Temporary Workarounds
Network Segmentation
allRestrict access to internal management interfaces
Access Control Hardening
allImplement strict authentication and authorization controls for device management
🧯 If You Can't Patch
- Implement strict network segmentation to isolate affected devices
- Enforce least privilege access controls and monitor for suspicious internal traffic
🔍 How to Verify
Check if Vulnerable:
Check device model and firmware version against Huawei security advisoryCheck Version:
display version (Huawei CLI command)Verify Fix Applied:
Verify firmware version has been updated to patched version specified in advisory📡 Detection & Monitoring
Log Indicators:
- Unexpected board restarts
- Abnormal process crashes
- Authentication logs showing suspicious internal access
Network Indicators:
- Unusual inter-process communication patterns
- Abnormal traffic from internal management interfaces
SIEM Query:
source="huawei-firewall" AND (event_type="system_reboot" OR event_type="process_crash")