CVE-2024-46628
📋 TL;DR
This vulnerability allows remote attackers to execute arbitrary code on Tenda G3 routers by exploiting improper input sanitization in the USB partition unmount function. Attackers can gain full control of affected routers without authentication. All users running the vulnerable firmware version are affected.
💻 Affected Systems
- Tenda G3 Router
📦 What is this software?
G3 Firmware by Tendacn
⚠️ Risk & Real-World Impact
Worst Case
Complete router compromise allowing attacker to intercept all network traffic, install persistent malware, pivot to internal networks, and disable security functions.
Likely Case
Router takeover leading to DNS hijacking, credential theft from network traffic, and installation of cryptocurrency miners or botnet malware.
If Mitigated
Limited impact if router is behind firewall with strict inbound rules, though internal attacks remain possible.
🎯 Exploit Status
Public GitHub repository contains exploit details; simple HTTP request with crafted parameter can trigger RCE.
🛠️ 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 for G3 model
3. Access router admin interface
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 web interface
Block USB management interface
linuxUse firewall rules to block access to USB-related endpoints
iptables -A INPUT -p tcp --dport 80 -m string --string "usbPartitionName" --algo bm -j DROP
🧯 If You Can't Patch
- Isolate router on separate VLAN with strict firewall rules
- Implement network segmentation to limit router access to management network only
🔍 How to Verify
Check if Vulnerable:
Check firmware version in router admin interface under System Status or System ToolsCheck Version:
curl -s http://router-ip/goform/getStatus | grep versionVerify Fix Applied:
Verify firmware version is no longer v15.03.05.05📡 Detection & Monitoring
Log Indicators:
- HTTP requests containing usbPartitionName parameter with shell metacharacters
- Unusual process execution from web server context
Network Indicators:
- HTTP POST requests to /goform/setUSBPartitionUmount with suspicious payloads
- Outbound connections from router to unknown IPs
SIEM Query:
source="router_logs" AND "usbPartitionName" AND ("|" OR ";" OR "`" OR "$")