CVE-2023-34566
📋 TL;DR
This vulnerability is a stack overflow in Tenda AC10 routers that allows remote attackers to execute arbitrary code by sending specially crafted requests to the /goform/saveParentControlInfo endpoint. It affects Tenda AC10 v4 routers running firmware version US_AC10V4.0si_V16.03.10.13_cn. Attackers can potentially gain full control of affected devices.
💻 Affected Systems
- Tenda AC10 v4
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete device compromise leading to persistent backdoor installation, network traffic interception, lateral movement to other devices, and botnet recruitment.
Likely Case
Remote code execution allowing attacker to modify router settings, intercept traffic, or use device as proxy for further attacks.
If Mitigated
Limited impact if device is behind firewall with restricted WAN access and proper network segmentation.
🎯 Exploit Status
Public exploit details available in referenced research. Attack requires network access to router's web interface.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: Not available
Restart Required: Yes
Instructions:
1. Check Tenda website for firmware updates
2. If update available, download and flash via web interface
3. Factory reset after update
4. Reconfigure with secure settings
🔧 Temporary Workarounds
Disable remote management
allPrevent external access to router web interface
Network segmentation
allIsolate router management interface to trusted network
🧯 If You Can't Patch
- Replace affected device with supported model
- Deploy network firewall to block access to router management interface
🔍 How to Verify
Check if Vulnerable:
Check router firmware version in web interface under System Status or similar sectionCheck Version:
curl -s http://router-ip/goform/getStatus | grep versionVerify Fix Applied:
Verify firmware version is different from vulnerable version after update📡 Detection & Monitoring
Log Indicators:
- Multiple POST requests to /goform/saveParentControlInfo with long time parameter
- Unusual process execution in router logs
Network Indicators:
- HTTP requests with abnormally long time parameter values to router IP
- Unexpected outbound connections from router
SIEM Query:
source="router_logs" AND uri="/goform/saveParentControlInfo" AND parameter_length>100