CVE-2023-51628
📋 TL;DR
This vulnerability allows network-adjacent attackers to execute arbitrary code as root on D-Link DCS-8300LHV2 IP cameras by exploiting a stack-based buffer overflow in the ONVIF SetHostName function. Although authentication is required, the existing authentication mechanism can be bypassed. Only D-Link DCS-8300LHV2 IP camera users are affected.
💻 Affected Systems
- D-Link DCS-8300LHV2 IP Camera
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Full system compromise with root-level remote code execution, allowing attackers to take complete control of the camera, pivot to other network devices, or establish persistent access.
Likely Case
Camera compromise leading to video surveillance disruption, data exfiltration, or use as a foothold for lateral movement within the network.
If Mitigated
Limited impact if cameras are isolated in dedicated VLANs with strict network segmentation and access controls.
🎯 Exploit Status
Authentication bypass required but documented. Exploit requires crafting specific ONVIF packets.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Firmware version 1.08.01
Vendor Advisory: https://supportannouncement.us.dlink.com/announcement/publication.aspx?name=SAP10370
Restart Required: Yes
Instructions:
1. Download firmware version 1.08.01 from D-Link support site. 2. Log into camera web interface. 3. Navigate to Maintenance > Firmware Upgrade. 4. Upload the firmware file. 5. Wait for automatic reboot.
🔧 Temporary Workarounds
Disable ONVIF Service
allDisable the ONVIF protocol if not required for camera functionality.
Navigate to Setup > Network > ONVIF and disable the service
Network Segmentation
linuxIsolate cameras in dedicated VLAN with strict firewall rules.
iptables -A INPUT -s <camera_subnet> -p tcp --dport 80,443,554,2020 -j DROP
🧯 If You Can't Patch
- Segment cameras into isolated network VLAN with no internet access
- Implement strict firewall rules to block all unnecessary ports to cameras
🔍 How to Verify
Check if Vulnerable:
Check firmware version in camera web interface under Maintenance > Firmware Version. If version is below 1.08.01, device is vulnerable.Check Version:
curl -s http://<camera_ip>/cgi-bin/version.cgi | grep FirmwareVerify Fix Applied:
Confirm firmware version shows 1.08.01 or higher after upgrade.📡 Detection & Monitoring
Log Indicators:
- Multiple failed authentication attempts followed by ONVIF SetHostName requests
- Unusual ONVIF protocol traffic patterns
Network Indicators:
- ONVIF SOAP requests with abnormally long hostname parameters
- Traffic to camera ports 80, 443, 554, 2020 from unexpected sources
SIEM Query:
source_ip="*" AND dest_port IN (80, 443, 554, 2020) AND http_user_agent CONTAINS "ONVIF" AND http_uri CONTAINS "SetHostName"