CVE-2024-51007
📋 TL;DR
This vulnerability allows attackers to cause a Denial of Service (DoS) on Netgear XR300 routers by sending a specially crafted POST request to the wireless.cgi endpoint. The stack overflow in the passphrase parameter can crash the device, disrupting network services. Only Netgear XR300 routers running firmware version 1.0.3.78 are affected.
💻 Affected Systems
- Netgear XR300
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Router becomes completely unresponsive, requiring physical power cycle to restore functionality, causing extended network downtime.
Likely Case
Router crashes and reboots automatically, causing temporary network disruption (1-3 minutes) until services are restored.
If Mitigated
With proper network segmentation and access controls, impact is limited to isolated network segments with minimal business disruption.
🎯 Exploit Status
Public GitHub repository contains proof-of-concept exploit code. Exploitation requires network access to the router's web interface.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Not available
Vendor Advisory: https://www.netgear.com/about/security/
Restart Required: No
Instructions:
1. Check Netgear security advisory page for updates. 2. Monitor for firmware updates. 3. No official patch available as of current information.
🔧 Temporary Workarounds
Disable Remote Management
allPrevent external access to router web interface
Access router admin panel -> Advanced -> Remote Management -> Disable
Network Segmentation
allIsolate router management interface from untrusted networks
Configure firewall rules to restrict access to router IP on ports 80/443
🧯 If You Can't Patch
- Implement strict network access controls to limit who can reach the router's web interface
- Monitor router logs for repeated POST requests to wireless.cgi with abnormal passphrase lengths
🔍 How to Verify
Check if Vulnerable:
Check router firmware version in admin panel under Advanced -> Administration -> Router UpdateCheck Version:
curl -s http://router-ip/currentsetting.htm | grep firmwareVerify Fix Applied:
Verify firmware version is no longer 1.0.3.78 once patch becomes available📡 Detection & Monitoring
Log Indicators:
- Multiple POST requests to /wireless.cgi with long passphrase parameters
- Router reboot events following POST requests
Network Indicators:
- HTTP POST requests to router IP on port 80/443 with abnormally long passphrase parameters
SIEM Query:
source="router_logs" AND uri_path="/wireless.cgi" AND method="POST" AND content_length>1000