CVE-2019-14708
📋 TL;DR
A buffer overflow vulnerability in MicroDigital N-series cameras allows remote attackers to execute arbitrary code by exploiting the action parameter. This affects cameras with firmware through version 6400.0.8.5, enabling remote code execution under the nobody account context.
💻 Affected Systems
- MicroDigital N-series cameras
📦 What is this software?
Mdc N2190v Firmware by Microdigital
Mdc N4090 Firmware by Microdigital
Mdc N4090w Firmware by Microdigital
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise allowing attackers to install malware, pivot to other network devices, or use cameras as botnet nodes.
Likely Case
Remote code execution leading to camera hijacking, video feed interception, or denial of service attacks.
If Mitigated
Limited impact if cameras are isolated in separate VLANs with strict network segmentation and access controls.
🎯 Exploit Status
Buffer overflow in action parameter suggests straightforward exploitation. Public PoC available on pastebin.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: http://www.microdigital.co.kr/
Restart Required: No
Instructions:
Check vendor website for firmware updates. If available, download latest firmware and follow vendor's update procedure.
🔧 Temporary Workarounds
Network Segmentation
allIsolate cameras in separate VLAN with strict firewall rules
Access Control
linuxBlock external access to camera management interfaces
iptables -A INPUT -p tcp --dport [camera_port] -j DROP
🧯 If You Can't Patch
- Remove cameras from internet-facing networks immediately
- Implement strict network segmentation and monitor for suspicious traffic
🔍 How to Verify
Check if Vulnerable:
Check firmware version via camera web interface or SSH if enabled. Compare against vulnerable versions.Check Version:
Check via web interface at http://[camera_ip]/system or similar vendor-specific pathVerify Fix Applied:
Verify firmware version is above 6400.0.8.5. Test action parameter with safe payloads.📡 Detection & Monitoring
Log Indicators:
- Unusual process execution under nobody account
- Buffer overflow attempts in web server logs
Network Indicators:
- Unusual outbound connections from cameras
- Exploit traffic to action parameter endpoints
SIEM Query:
source="camera_logs" AND ("buffer overflow" OR "action parameter exploit")