CVE-2023-51100
📋 TL;DR
This CVE describes a command injection vulnerability in Tenda W9 routers that allows attackers to execute arbitrary commands on the device. The vulnerability exists in the formGetDiagnoseInfo function and affects users running the vulnerable firmware version. Attackers can exploit this to gain full control of the router.
💻 Affected Systems
- Tenda W9
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete compromise of the router allowing attackers to intercept traffic, modify configurations, install persistent backdoors, and pivot to internal networks.
Likely Case
Remote code execution leading to router compromise, DNS hijacking, credential theft, and network surveillance.
If Mitigated
Limited impact if network segmentation isolates the router and external access is restricted.
🎯 Exploit Status
Public proof-of-concept code exists on GitHub. The vulnerability appears to be remotely exploitable without authentication.
🛠️ 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. Download the latest firmware for W9 router. 3. Access router admin interface. 4. Navigate to firmware upgrade section. 5. Upload and apply the new firmware. 6. Reboot the router.
🔧 Temporary Workarounds
Disable remote management
allPrevent external access to router administration interface
Network segmentation
allIsolate router management interface to trusted network segments only
🧯 If You Can't Patch
- Replace affected routers with different models or brands
- Implement strict firewall rules to block all external access to router management interface
🔍 How to Verify
Check if Vulnerable:
Check router firmware version in 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 Information page.Verify 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 formGetDiagnoseInfo endpoint
- Suspicious command execution in system logs
- Unexpected process creation
Network Indicators:
- Unusual outbound connections from router
- Traffic to unexpected destinations
- Port scanning originating from router
SIEM Query:
source="router_logs" AND (uri="/goform/GetDiagnoseInfo" OR process="formGetDiagnoseInfo")