CVE-2023-46369
📋 TL;DR
CVE-2023-46369 is a critical stack overflow vulnerability in Tenda W18E routers that allows remote attackers to execute arbitrary code by sending specially crafted requests to the vulnerable parameter. This affects all users running the vulnerable firmware version on these routers, potentially giving attackers full control over the device.
💻 Affected Systems
- Tenda W18E
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete device compromise leading to persistent backdoor installation, network traffic interception, credential theft, and lateral movement to other devices on the network.
Likely Case
Remote code execution allowing attackers to modify router settings, intercept traffic, or use the router as a pivot point for further attacks.
If Mitigated
Limited impact if network segmentation isolates the router and external access is restricted, though local network attacks remain possible.
🎯 Exploit Status
The GitHub reference contains detailed exploit code showing how to trigger the overflow and achieve code execution.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: Not available
Restart Required: Yes
Instructions:
1. Check Tenda's official website for firmware updates
2. If available, download the latest firmware
3. Access router admin interface
4. Navigate to firmware upgrade section
5. Upload and apply the new firmware
6. Wait for router to reboot
🔧 Temporary Workarounds
Disable remote management
allPrevent external access to the router's management interface
Network segmentation
allIsolate the router from critical network segments
🧯 If You Can't Patch
- Replace the vulnerable router with a different model from a vendor that provides security updates
- Implement strict network access controls to limit traffic to the router's management interface
🔍 How to Verify
Check if Vulnerable:
Check router firmware version via admin interface at 192.168.0.1 or 192.168.1.1, navigate to System Status or About pageCheck Version:
curl -s http://192.168.0.1/goform/getStatus | grep versionVerify Fix Applied:
Verify firmware version is newer than V16.01.0.8(1576) after applying any available update📡 Detection & Monitoring
Log Indicators:
- Unusual POST requests to formSetNetCheckTools endpoint
- Multiple failed login attempts followed by exploitation attempts
- Router configuration changes without authorized user action
Network Indicators:
- Unusual outbound connections from router to unknown IPs
- Traffic patterns suggesting router is being used as proxy
- Port scanning originating from router IP
SIEM Query:
source="router_logs" AND (uri="/goform/setNetCheckTools" OR uri="/goform/formSetNetCheckTools") AND method="POST"