CVE-2024-11061
📋 TL;DR
A critical stack-based buffer overflow vulnerability in Tenda AC10 routers allows remote attackers to execute arbitrary code by manipulating the timeZone parameter. This affects Tenda AC10 routers running firmware version 16.03.10.13. Attackers can exploit this remotely without authentication to potentially take full control of affected devices.
💻 Affected Systems
- Tenda AC10
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Remote code execution leading to complete device compromise, lateral movement to internal networks, persistent backdoor installation, and botnet recruitment.
Likely Case
Remote code execution allowing attackers to modify router settings, intercept network traffic, or use the device as a pivot point for further attacks.
If Mitigated
Limited impact if devices are behind firewalls with strict inbound filtering, though internal network exposure remains a concern.
🎯 Exploit Status
Exploit details have been publicly disclosed, making weaponization highly probable. The vulnerability requires no authentication and has a straightforward exploitation path.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: https://www.tenda.com.cn/
Restart Required: Yes
Instructions:
1. Check Tenda's official website for firmware updates. 2. Download the latest firmware for AC10. 3. Access router admin interface. 4. Navigate to firmware upgrade section. 5. Upload and apply the new firmware. 6. Reboot the router.
🔧 Temporary Workarounds
Disable remote administration
allPrevent external access to the router's administration interface
Network segmentation
allIsolate the router from critical internal networks using VLANs or firewalls
🧯 If You Can't Patch
- Replace affected routers with patched or different vendor models
- Implement strict network access controls to limit exposure of vulnerable devices
🔍 How to Verify
Check if Vulnerable:
Check router firmware version via admin interface. If version is 16.03.10.13, the device is vulnerable.Check Version:
Login to router admin interface and check System Status or Firmware Upgrade section for version information.Verify Fix Applied:
After updating, verify firmware version is no longer 16.03.10.13. Test by attempting to access /goform/fast_setting_wifi_set with malformed timeZone parameter.📡 Detection & Monitoring
Log Indicators:
- Unusual requests to /goform/fast_setting_wifi_set with long timeZone parameters
- Multiple failed login attempts followed by buffer overflow patterns
- Unexpected router reboots or configuration changes
Network Indicators:
- Unusual outbound connections from router to unknown IPs
- Traffic patterns suggesting command and control communication
- Port scanning originating from router
SIEM Query:
source="router_logs" AND (uri="/goform/fast_setting_wifi_set" AND timeZone.length>100) OR (event_type="buffer_overflow" AND device_model="Tenda AC10")