CVE-2023-44023
📋 TL;DR
This vulnerability allows remote attackers to execute arbitrary code on Tenda AC10U routers by exploiting a stack overflow in the WiFi configuration function. Attackers can send specially crafted requests to the router's web interface, potentially gaining full control of the device. This affects all users running the vulnerable firmware version.
💻 Affected Systems
- Tenda AC10U
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete compromise of the router leading to persistent backdoor installation, network traffic interception, credential theft, and lateral movement to connected devices.
Likely Case
Remote code execution allowing attackers to modify router settings, intercept traffic, or use the router as part of a botnet.
If Mitigated
Limited impact if the router is behind a firewall with restricted WAN access and strong authentication requirements.
🎯 Exploit Status
Public proof-of-concept exists in GitHub repositories. Exploitation appears straightforward based on the vulnerability description.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: Not available
Restart Required: Yes
Instructions:
1. Check Tenda's official website for firmware updates. 2. Download the latest firmware for AC10U. 3. Access 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
allPrevents external attackers from accessing the vulnerable web interface
Change Default Credentials
allReduces risk of unauthorized access to router configuration
🧯 If You Can't Patch
- Isolate the router in a separate VLAN with strict firewall rules
- Implement network segmentation to limit potential lateral movement
🔍 How to Verify
Check if Vulnerable:
Check router firmware version in admin interface under System Status or System ToolsCheck Version:
Login to router web interface and check System Status pageVerify Fix Applied:
Verify firmware version has been updated to a version later than V15.03.06.49📡 Detection & Monitoring
Log Indicators:
- Unusual POST requests to /goform/fast_setting_wifi_set
- Multiple failed login attempts followed by configuration changes
- Router reboot events after configuration changes
Network Indicators:
- Unusual outbound connections from router
- Traffic patterns suggesting command and control communication
- Port scanning originating from router
SIEM Query:
source="router_logs" AND (uri="/goform/fast_setting_wifi_set" OR event="configuration_change")