CVE-2023-30378
📋 TL;DR
A stack-based buffer overflow vulnerability in Tenda AC15 routers allows remote attackers to execute arbitrary code by sending specially crafted requests to the affected function. This affects all users running the vulnerable firmware version on Tenda AC15 routers.
💻 Affected Systems
- Tenda AC15
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Remote code execution leading to complete device compromise, network takeover, credential theft, and persistent backdoor installation.
Likely Case
Router compromise allowing attackers to intercept network traffic, modify DNS settings, and pivot to internal network devices.
If Mitigated
Limited impact if network segmentation isolates the router and external access is restricted.
🎯 Exploit Status
Public GitHub repository contains exploit details and proof-of-concept code.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: Unknown
Restart Required: Yes
Instructions:
1. Check Tenda website for firmware updates. 2. Download latest firmware. 3. Access router admin interface. 4. Navigate to firmware upgrade section. 5. Upload and install new firmware. 6. Reboot router.
🔧 Temporary Workarounds
Disable Remote Management
allPrevent external access to router administration interface
Network Segmentation
allIsolate router management interface to separate VLAN
🧯 If You Can't Patch
- Replace affected router with different model or vendor
- Implement strict firewall rules blocking all external access to router management interface
🔍 How to Verify
Check if Vulnerable:
Access router web interface, navigate to System Status or About page, check firmware version matches V15.03.05.19Check Version:
curl -s http://router-ip/goform/getStatus | grep versionVerify Fix Applied:
Check firmware version after update shows different version than V15.03.05.19📡 Detection & Monitoring
Log Indicators:
- Unusual HTTP requests to router management interface
- Multiple failed buffer overflow attempts in system logs
Network Indicators:
- Unusual traffic patterns to router management port
- Suspicious payloads in HTTP requests
SIEM Query:
source="router.log" AND ("sub_8EE8" OR "buffer overflow" OR "malformed request")