CVE-2023-51098
📋 TL;DR
This CVE describes a command injection vulnerability in Tenda W9 routers that allows attackers to execute arbitrary commands on the device. Attackers can exploit this vulnerability by sending specially crafted requests to the formSetDiagnoseInfo function. This affects users running Tenda W9 routers with vulnerable firmware.
💻 Affected Systems
- Tenda W9
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete compromise of the router leading to network takeover, credential theft, malware deployment, and persistent backdoor installation.
Likely Case
Router compromise allowing attackers to intercept network traffic, modify DNS settings, or use the router as a pivot point into the internal network.
If Mitigated
Limited impact if network segmentation isolates the router and proper access controls prevent unauthorized access to the management interface.
🎯 Exploit Status
Public proof-of-concept code exists on GitHub. The vulnerability requires no authentication and has simple exploitation vectors.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: No vendor advisory found
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 install the new firmware. 6. Reboot the router.
🔧 Temporary Workarounds
Disable Remote Management
allPrevent external access to the router's management interface
Network Segmentation
allIsolate the router from critical internal networks
🧯 If You Can't Patch
- Replace the vulnerable router with a different model or vendor
- Implement strict firewall rules to block all external access to the router's management interface
🔍 How to Verify
Check if Vulnerable:
Check router firmware version via admin interface. If version is V1.0.0.7(4456)_CN, the device is vulnerable.Check Version:
Login to router admin interface and check System Status or Firmware Version pageVerify Fix Applied:
Verify firmware version has been updated to a version later than V1.0.0.7(4456)_CN📡 Detection & Monitoring
Log Indicators:
- Unusual POST requests to formSetDiagnoseInfo endpoint
- Suspicious command execution in router logs
- Multiple failed login attempts followed by successful access
Network Indicators:
- Unusual outbound connections from router
- DNS hijacking patterns
- Traffic redirection to suspicious IPs
SIEM Query:
source="router_logs" AND (uri="/goform/setDiagnoseInfo" OR message="formSetDiagnoseInfo")