CVE-2024-44390
📋 TL;DR
This buffer overflow vulnerability in Tenda FH1206 routers allows attackers to execute arbitrary code by sending specially crafted requests to the formWrlsafeset function. It affects all users running vulnerable firmware versions. Successful exploitation could lead to complete device compromise.
💻 Affected Systems
- Tenda FH1206
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Remote code execution leading to full router compromise, credential theft, network traffic interception, and lateral movement into connected networks.
Likely Case
Router takeover allowing attackers to modify DNS settings, intercept traffic, or use the device as a pivot point for further attacks.
If Mitigated
Limited impact if network segmentation isolates the router and proper access controls prevent external exploitation.
🎯 Exploit Status
Proof of concept code is publicly available on GitHub. Exploitation appears straightforward based on the buffer overflow nature.
🛠️ 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 FH1206
3. Access router admin interface
4. Navigate to firmware upgrade section
5. Upload and apply new firmware
6. Reboot router after update
🔧 Temporary Workarounds
Disable remote management
allPrevent external access to router management interface
Network segmentation
allIsolate router management interface to trusted network segment
🧯 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 ports
🔍 How to Verify
Check if Vulnerable:
Check router firmware version via admin interface. If version is V1.2.0.8(8155)_EN or earlier, assume vulnerable.Check Version:
Login to router admin interface and check System Status or Firmware Upgrade sectionVerify Fix Applied:
Verify firmware version has been updated to a version later than V1.2.0.8(8155)_EN📡 Detection & Monitoring
Log Indicators:
- Unusual POST requests to formWrlsafeset endpoint
- Multiple failed buffer overflow attempts
- Router reboot events
Network Indicators:
- Unusual traffic patterns to router management port (typically 80/443)
- Exploit payload patterns in HTTP requests
SIEM Query:
source="router_logs" AND (uri="/goform/formWrlsafeset" OR message="buffer overflow")