CVE-2023-44017
📋 TL;DR
This vulnerability allows remote attackers to execute arbitrary code on Tenda AC10U routers by exploiting a stack overflow in the timeZone parameter. Attackers can gain full control of affected devices without authentication. Only Tenda AC10U v1.0 routers with specific firmware versions are affected.
💻 Affected Systems
- Tenda AC10U
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete device takeover leading to persistent backdoor installation, network traffic interception, lateral movement to other devices, and participation in botnets.
Likely Case
Router compromise allowing attackers to modify DNS settings, intercept traffic, steal credentials, and use the device for further attacks.
If Mitigated
Limited impact if device is behind firewall with restricted WAN access and proper network segmentation.
🎯 Exploit Status
Public GitHub repository contains exploit details and proof-of-concept code. No authentication required for exploitation.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: Unknown
Restart Required: Yes
Instructions:
1. Check Tenda official website for firmware updates. 2. Download latest firmware for AC10U v1.0. 3. Access router admin interface. 4. Navigate to System Tools > Firmware Upgrade. 5. Upload and install new firmware. 6. Reboot router.
🔧 Temporary Workarounds
Disable Remote Management
allPrevent external access to router administration interface
Network Segmentation
allIsolate router management interface from untrusted networks
🧯 If You Can't Patch
- Replace affected router with different model/brand
- Place router behind firewall with strict inbound rules blocking all WAN access to management interface
🔍 How to Verify
Check if Vulnerable:
Check router firmware version in admin interface under System Status or System Tools > Firmware UpgradeCheck Version:
Login to router admin interface and check firmware version displayedVerify Fix Applied:
Verify firmware version has changed from vulnerable version to newer version📡 Detection & Monitoring
Log Indicators:
- Unusual POST requests to /goform/SetSysTime
- Multiple failed login attempts followed by successful access
- Unexpected firmware modification timestamps
Network Indicators:
- Unusual outbound connections from router
- DNS hijacking patterns
- Traffic redirection to unknown IPs
SIEM Query:
source="router_logs" AND (uri="/goform/SetSysTime" OR message="timeZone")