CVE-2023-47456
📋 TL;DR
Tenda AX1806 routers running firmware V1.0.0.1 contain a stack overflow vulnerability in the wireless repeater configuration function. This allows remote attackers to execute arbitrary code on the device, potentially gaining full control. All users of affected routers are at risk.
💻 Affected Systems
- Tenda AX1806
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete device compromise leading to persistent backdoor installation, network traffic interception, lateral movement to connected devices, and botnet recruitment.
Likely Case
Remote code execution allowing attacker to modify router settings, intercept traffic, or use device as proxy for attacks.
If Mitigated
Limited impact if device is behind firewall with restricted WAN access and strong network segmentation.
🎯 Exploit Status
Public proof-of-concept available in GitHub repository. Exploitation requires network access to router's web interface.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: Unknown
Restart Required: Yes
Instructions:
1. Check Tenda support site for firmware updates
2. Download latest firmware for AX1806
3. Log into router admin interface
4. Navigate to System Tools > Firmware Upgrade
5. Upload and install new firmware
6. Reboot router
🔧 Temporary Workarounds
Disable Wireless Repeater Function
allDisable the vulnerable wireless repeater feature to prevent exploitation
Restrict Web Interface Access
allLimit access to router admin interface to trusted IP addresses only
🧯 If You Can't Patch
- Isolate affected router in separate VLAN with strict firewall rules
- Implement network monitoring for unusual traffic patterns from router
🔍 How to Verify
Check if Vulnerable:
Check router firmware version in admin interface under System Status. If version is V1.0.0.1, device is vulnerable.Check Version:
curl -s http://router-ip/goform/getStatus | grep versionVerify Fix Applied:
Verify firmware version has been updated to a version later than V1.0.0.1📡 Detection & Monitoring
Log Indicators:
- Unusual POST requests to /goform/setWirelessRepeat
- Multiple failed authentication attempts to router admin
Network Indicators:
- Unusual outbound connections from router
- Traffic spikes from router to unknown external IPs
SIEM Query:
source="router-logs" AND (uri="/goform/setWirelessRepeat" OR method="POST" AND uri LIKE "%/goform/%")