CVE-2024-7614
📋 TL;DR
This critical vulnerability in Tenda FH1206 routers allows remote attackers to execute arbitrary code via a stack-based buffer overflow in the QoS configuration function. Attackers can exploit this without authentication to potentially take full control of affected devices. All users of Tenda FH1206 routers with firmware version 1.2.0.8(8155) are affected.
💻 Affected Systems
- Tenda FH1206
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete device compromise allowing persistent backdoor installation, network traffic interception, lateral movement to other devices, and participation in botnets.
Likely Case
Remote code execution leading to device takeover, credential theft, and network surveillance capabilities.
If Mitigated
Limited impact if devices are behind firewalls with strict inbound filtering and network segmentation.
🎯 Exploit Status
Public exploit code is available on GitHub, making exploitation straightforward for attackers with basic skills.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: None available
Restart Required: Yes
Instructions:
1. Check Tenda's official website for firmware updates. 2. If available, download the latest firmware. 3. Log into router admin interface. 4. Navigate to System Tools > Firmware Upgrade. 5. Upload and install the new firmware. 6. Reboot the router.
🔧 Temporary Workarounds
Disable Remote Management
allPrevent external access to the vulnerable interface by disabling remote administration features.
Network Segmentation
allIsolate affected routers in separate VLANs with strict firewall rules limiting access to management interfaces.
🧯 If You Can't Patch
- Replace affected devices with patched or alternative models
- Implement strict network access controls to limit exposure to the vulnerable interface
🔍 How to Verify
Check if Vulnerable:
Check router firmware version via web interface: System Status > Firmware Version. If version is 1.2.0.8(8155), device is vulnerable.Check Version:
No CLI command available; check via web interface at System Status > Firmware VersionVerify Fix Applied:
Verify firmware version has changed from 1.2.0.8(8155) to a newer version after applying any available update.📡 Detection & Monitoring
Log Indicators:
- Unusual POST requests to /goform/qossetting with long parameter values
- Multiple failed authentication attempts followed by QoS configuration requests
Network Indicators:
- HTTP POST requests to router IP on port 80/443 targeting /goform/qossetting with abnormal payload sizes
- Traffic patterns suggesting buffer overflow attempts
SIEM Query:
source="router_logs" AND (uri="/goform/qossetting" AND content_length>1000) OR (event_description CONTAINS "buffer overflow" AND device_model="FH1206")