CVE-2024-10661
📋 TL;DR
This critical vulnerability in Tenda AC15 routers allows remote attackers to execute arbitrary code via a stack-based buffer overflow in the DLNA configuration function. Attackers can exploit this without authentication to potentially take full control of affected devices. Users running vulnerable firmware versions are at immediate risk.
💻 Affected Systems
- Tenda AC15
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Remote code execution leading to complete device compromise, persistent backdoor installation, network pivoting, and data exfiltration.
Likely Case
Router takeover enabling traffic interception, DNS manipulation, credential theft, and botnet recruitment.
If Mitigated
Limited impact if device is behind firewall with restricted WAN access, though LAN exploitation remains possible.
🎯 Exploit Status
Public exploit code exists in GitHub repository. Attack requires sending crafted HTTP POST request to vulnerable endpoint.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: https://www.tenda.com.cn/
Restart Required: Yes
Instructions:
1. Check Tenda website for firmware updates. 2. Download latest firmware. 3. Access router admin interface. 4. Navigate to System Tools > Firmware Upgrade. 5. Upload new firmware file. 6. Wait for automatic reboot.
🔧 Temporary Workarounds
Disable Remote Management
allPrevent external exploitation by disabling WAN access to router web interface
Network Segmentation
allIsolate router management interface to separate VLAN
🧯 If You Can't Patch
- Replace vulnerable device with supported model
- Implement strict firewall rules blocking access to port 80/443 on router from untrusted networks
🔍 How to Verify
Check if Vulnerable:
Check firmware version in router web interface under System Status or via command: curl -s http://router-ip/goform/SetDlnaCfgCheck Version:
curl -s http://router-ip | grep -i firmware || ssh admin@router 'cat /etc/version'Verify Fix Applied:
Verify firmware version is updated beyond 15.03.05.19 and test exploit no longer works📡 Detection & Monitoring
Log Indicators:
- HTTP POST requests to /goform/SetDlnaCfg with long scanList parameter
- Router crash/reboot logs
- Unusual process execution
Network Indicators:
- HTTP traffic to router port 80/443 with abnormal POST data patterns
- Outbound connections from router to suspicious IPs
SIEM Query:
source="router-logs" AND (uri_path="/goform/SetDlnaCfg" AND content_length>1000)