CVE-2013-7487
📋 TL;DR
This vulnerability allows remote attackers to execute arbitrary code on affected Swann DVR devices via TCP port 9000. The raysharpdvr application contains a vulnerable system() call that can be exploited without authentication. This affects Swann DVR04B, DVR08B, DVR-16CIF, and DVR16B devices.
💻 Affected Systems
- Swann DVR04B
- Swann DVR08B
- Swann DVR-16CIF
- Swann DVR16B
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete device compromise allowing attackers to install malware, pivot to internal networks, disable security systems, or use devices in botnets.
Likely Case
Remote code execution leading to surveillance system compromise, data theft, or device hijacking for malicious activities.
If Mitigated
Limited impact if devices are isolated from internet and internal networks with strict firewall rules.
🎯 Exploit Status
Exploit requires sending specially crafted TCP packets to port 9000. Public exploit code exists since 2013.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: None available
Vendor Advisory: No official vendor advisory found
Restart Required: No
Instructions:
No official patch exists. Consider replacing affected devices with newer models or implementing network controls.
🔧 Temporary Workarounds
Network Segmentation
linuxIsolate DVR devices from internet and restrict internal network access
iptables -A INPUT -p tcp --dport 9000 -j DROP
iptables -A OUTPUT -p tcp --dport 9000 -j DROP
Port Blocking
windowsBlock TCP port 9000 at network perimeter and internal firewalls
netsh advfirewall firewall add rule name="Block DVR Port" dir=in action=block protocol=TCP localport=9000
🧯 If You Can't Patch
- Replace affected devices with newer models that don't contain this vulnerability
- Implement strict network segmentation and firewall rules to block all external and unnecessary internal access to port 9000
🔍 How to Verify
Check if Vulnerable:
Check if device responds to TCP connections on port 9000: nc -zv [device_ip] 9000Check Version:
Check device web interface or physical label for model numberVerify Fix Applied:
Verify port 9000 is no longer accessible: nc -zv [device_ip] 9000 should fail📡 Detection & Monitoring
Log Indicators:
- Unusual connections to port 9000
- Unexpected process execution on DVR device
- System command execution via raysharpdvr
Network Indicators:
- TCP connections to port 9000 from unexpected sources
- Malformed packets to port 9000
- Outbound connections from DVR to suspicious IPs
SIEM Query:
source_port=9000 OR dest_port=9000 | stats count by src_ip, dest_ip