CVE-2024-40417
📋 TL;DR
A stack-based buffer overflow vulnerability exists in Tenda AX1806 routers running firmware version 1.0.0.1. Attackers can exploit this by sending specially crafted requests to the /goform/SetIpMacBind endpoint, potentially allowing remote code execution. This affects users who haven't updated their router firmware.
💻 Affected Systems
- Tenda AX1806
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Remote unauthenticated attacker gains full control of the router, enabling traffic interception, network pivoting, or persistent backdoor installation.
Likely Case
Router crashes or becomes unstable, causing denial of service for connected devices.
If Mitigated
With proper network segmentation and firewall rules, impact is limited to the router itself without lateral movement.
🎯 Exploit Status
Public proof-of-concept available in GitHub repository shows exploitation details.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: Not found
Restart Required: Yes
Instructions:
1. Check Tenda website for firmware updates
2. Download latest firmware for AX1806
3. Access router admin panel
4. Navigate to System Tools > Firmware Upgrade
5. Upload and apply new firmware
6. Reboot router
🔧 Temporary Workarounds
Disable Remote Management
allPrevent external access to router management interface
Network Segmentation
allIsolate router management interface to separate VLAN
🧯 If You Can't Patch
- Replace affected router with different model/brand
- Implement strict firewall rules blocking access to port 80/443 on router IP
🔍 How to Verify
Check if Vulnerable:
Check router firmware version in admin panel under System StatusCheck Version:
curl -s http://router-ip/goform/getStatus | grep versionVerify Fix Applied:
Verify firmware version is no longer 1.0.0.1 after update📡 Detection & Monitoring
Log Indicators:
- Multiple POST requests to /goform/SetIpMacBind with large payloads
- Router crash/reboot logs
Network Indicators:
- Unusual HTTP traffic to router management port with oversized parameters
SIEM Query:
source="router.log" AND (url="/goform/SetIpMacBind" AND content_length>1000)