CVE-2024-41463
📋 TL;DR
CVE-2024-41463 is a stack-based buffer overflow vulnerability in Tenda FH1201 routers that allows remote attackers to execute arbitrary code or cause denial of service by sending specially crafted requests to the entrys parameter. This affects all users running vulnerable firmware versions of the Tenda FH1201 router.
💻 Affected Systems
- Tenda FH1201
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Remote code execution leading to complete device compromise, persistence, and lateral movement to connected networks.
Likely Case
Router crash causing denial of service, requiring physical reset to restore functionality.
If Mitigated
Limited impact if device is behind firewall with restricted access to management interface.
🎯 Exploit Status
Public proof-of-concept available in GitHub repository. Exploitation requires sending HTTP POST request to vulnerable endpoint.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: Not available
Restart Required: Yes
Instructions:
1. Check Tenda website for firmware updates. 2. Download latest firmware. 3. Access router admin panel. 4. Navigate to System Tools > Firmware Upgrade. 5. Upload new firmware file. 6. Wait for automatic reboot.
🔧 Temporary Workarounds
Disable WAN Management Access
allPrevent external access to router management interface
Access router admin panel > Advanced > System Tools > Remote Management > Disable
Network Segmentation
allIsolate router management interface to trusted network segment
Configure firewall rules to restrict access to port 80/443 to trusted IPs only
🧯 If You Can't Patch
- Replace vulnerable device with supported model
- Deploy network firewall with deep packet inspection to block exploit patterns
🔍 How to Verify
Check if Vulnerable:
Check firmware version in router admin panel under System Status or System Tools > Firmware UpgradeCheck Version:
curl -s http://router-ip/goform/getStatus | grep versionVerify Fix Applied:
Verify firmware version is newer than v1.2.0.14 and test if /ip/goform/addressNat endpoint still accepts malformed entrys parameter📡 Detection & Monitoring
Log Indicators:
- Multiple POST requests to /ip/goform/addressNat with large entrys parameter
- Router crash/reboot logs
Network Indicators:
- HTTP POST requests to /ip/goform/addressNat with unusually long parameters
- Traffic patterns matching known exploit code
SIEM Query:
source="router_logs" AND (url="/ip/goform/addressNat" AND parameter_size>1000)