CVE-2023-50000
📋 TL;DR
This CVE describes a stack overflow vulnerability in Tenda W30E routers via the formResetMeshNode function. Attackers can exploit this to execute arbitrary code or cause denial of service. Users of Tenda W30E routers with vulnerable firmware are affected.
💻 Affected Systems
- Tenda W30E
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Remote code execution leading to complete device compromise, network infiltration, and persistent backdoor installation.
Likely Case
Router crash causing denial of service, requiring physical reset and temporary network disruption.
If Mitigated
Limited impact with proper network segmentation and firewall rules preventing external access to management interface.
🎯 Exploit Status
Public GitHub repository contains detailed analysis and likely exploit code. Stack overflow vulnerabilities in embedded devices are frequently weaponized.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: Not found in provided references
Restart Required: Yes
Instructions:
1. Check Tenda website for firmware updates
2. Download latest firmware for W30E
3. Access router web interface
4. Navigate to System Tools > Firmware Upgrade
5. Upload and install new firmware
6. Reboot router
🔧 Temporary Workarounds
Disable Remote Management
allPrevent external access to router web interface
Network Segmentation
allIsolate router management interface to trusted network
🧯 If You Can't Patch
- Replace vulnerable router with different model/brand
- Implement strict firewall rules blocking all external access to router management ports (typically 80/443)
🔍 How to Verify
Check if Vulnerable:
Check router firmware version in web interface under System Status or System ToolsCheck Version:
Not applicable - check via web interface at http://router_ipVerify Fix Applied:
Verify firmware version is newer than V16.01.0.12(4843) after update📡 Detection & Monitoring
Log Indicators:
- Multiple failed login attempts to router interface
- Unusual POST requests to formResetMeshNode endpoint
- Router crash/reboot logs
Network Indicators:
- Unusual traffic to router management ports from external IPs
- Large payloads sent to router web interface
SIEM Query:
source_ip=external AND dest_port IN (80,443) AND uri_path CONTAINS 'formResetMeshNode' AND http_method='POST'