CVE-2023-27017
📋 TL;DR
CVE-2023-27017 is a critical stack overflow vulnerability in Tenda AC10 routers that allows attackers to cause denial of service or execute arbitrary code via crafted network requests. This affects users of Tenda AC10 routers running vulnerable firmware versions.
💻 Affected Systems
- Tenda AC10
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Remote code execution leading to complete router compromise, network traffic interception, and lateral movement to connected devices.
Likely Case
Router crash causing denial of service, requiring physical reset and temporary network disruption.
If Mitigated
Limited impact if router is behind firewall with restricted WAN access and updated firmware.
🎯 Exploit Status
Public GitHub repository contains detailed analysis and likely exploit code; stack overflow vulnerabilities are commonly weaponized.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: Not available
Restart Required: Yes
Instructions:
1. Check Tenda support for firmware updates
2. Download latest firmware from official Tenda website
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
allPlace router in isolated network segment with strict firewall rules
🧯 If You Can't Patch
- Replace vulnerable router with supported model
- Implement strict network access controls and monitor for exploitation attempts
🔍 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 firmware version in system informationVerify Fix Applied:
Verify firmware version has been updated to a version later than V16.03.10.13📡 Detection & Monitoring
Log Indicators:
- Router crash/reboot events
- Unusual traffic patterns to router management interface
- Failed login attempts
Network Indicators:
- Unusual payloads sent to router management ports
- Traffic patterns matching known exploit signatures
SIEM Query:
source="router_logs" AND (event="crash" OR event="reboot") OR dest_port=80 AND http_uri contains "sub_45DC58"