CVE-2023-50089
📋 TL;DR
This vulnerability allows authenticated attackers to execute arbitrary commands on NETGEAR WNR2000v4 routers via HTTP SOAP authentication. Attackers who can authenticate to the router's web interface can gain full system control. Only users of this specific router model and firmware version are affected.
💻 Affected Systems
- NETGEAR WNR2000v4
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete router compromise allowing attackers to intercept all network traffic, install persistent malware, pivot to internal networks, and use the router as a botnet node.
Likely Case
Local network attackers gaining administrative access to modify router settings, intercept traffic, or launch attacks against internal devices.
If Mitigated
Limited impact if strong authentication is used and network segmentation isolates the router management interface.
🎯 Exploit Status
Exploit requires authentication but is trivial to execute once authenticated; public proof-of-concept available
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: https://www.netgear.com/about/security/
Restart Required: Yes
Instructions:
1. Check NETGEAR security advisory page for updates
2. If patch available, download firmware from NETGEAR support site
3. Log into router admin interface
4. Navigate to firmware update section
5. Upload and apply new firmware
6. Reboot router
🔧 Temporary Workarounds
Disable HTTP Management
allForce HTTPS-only access to router management interface
Change Default Credentials
allUse strong, unique passwords for router administration
🧯 If You Can't Patch
- Replace affected router with supported model
- Isolate router management interface to trusted network segments only
🔍 How to Verify
Check if Vulnerable:
Check router firmware version in admin interface under Advanced > Administration > Router StatusCheck Version:
Login to router web interface and navigate to firmware information pageVerify Fix Applied:
Verify firmware version is no longer 1.0.0.70 after update📡 Detection & Monitoring
Log Indicators:
- Unusual SOAP authentication attempts
- Unexpected command execution in router logs
- Multiple failed authentication attempts followed by successful login
Network Indicators:
- HTTP POST requests to SOAP endpoints with command injection patterns
- Unusual outbound connections from router
SIEM Query:
source="router_logs" AND ("SOAP" OR "command" OR "injection")🔗 References
- https://github.com/NoneShell/Vulnerabilities/blob/main/NETGEAR/WNR2000v4-1.0.0.70-Authorized-Command-Injection.md
- https://www.netgear.com/about/security/
- https://github.com/NoneShell/Vulnerabilities/blob/main/NETGEAR/WNR2000v4-1.0.0.70-Authorized-Command-Injection.md
- https://www.netgear.com/about/security/
