CVE-2024-8230
📋 TL;DR
This critical vulnerability in Tenda O6 routers allows remote attackers to execute arbitrary code via a stack-based buffer overflow in the fromSafeSetMacFilter function. Attackers can exploit this by sending specially crafted requests to the /goform/setMacFilterList endpoint. All users of affected Tenda O6 router versions are at risk.
💻 Affected Systems
- Tenda O6 router
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Remote code execution leading to complete device compromise, persistent backdoor installation, and lateral movement into connected networks.
Likely Case
Router takeover enabling traffic interception, DNS manipulation, credential theft, and denial of service.
If Mitigated
Limited impact if device is behind strict network segmentation with no internet exposure.
🎯 Exploit Status
Exploit details are publicly available on GitHub. The vulnerability requires no authentication and has straightforward exploitation.
🛠️ 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 panel. 4. Navigate to firmware upgrade section. 5. Upload and apply new firmware. 6. Reboot router.
🔧 Temporary Workarounds
Disable remote administration
allPrevent external access to router administration interface
Access router admin panel -> Advanced Settings -> Remote Management -> Disable
Network segmentation
allIsolate router management interface to separate VLAN
🧯 If You Can't Patch
- Replace affected router with different model/brand
- Implement strict network access controls to limit access to router management interface
🔍 How to Verify
Check if Vulnerable:
Check router firmware version in admin panel. If version is 1.0.0.7(2054), device is vulnerable.Check Version:
Access router web interface at http://[router-ip] and check firmware version in System Status or About section.Verify Fix Applied:
Verify firmware version has been updated to a version later than 1.0.0.7(2054).📡 Detection & Monitoring
Log Indicators:
- Multiple POST requests to /goform/setMacFilterList with long parameter values
- Unusual traffic patterns to router management interface
Network Indicators:
- HTTP POST requests to /goform/setMacFilterList with oversized remark/type/time parameters
- Unusual outbound connections from router
SIEM Query:
source="router_logs" AND (url="/goform/setMacFilterList" AND (param_length>1000 OR contains(param,"\x90")))