CVE-2021-4469
📋 TL;DR
Denver SHO-110 IP cameras expose an unauthenticated HTTP endpoint on port 8001 that allows remote attackers to retrieve image snapshots. This backdoor service bypasses the authentication required on the primary web interface, enabling unauthorized surveillance of monitored environments. All users of affected Denver SHO-110 cameras are impacted.
💻 Affected Systems
- Denver SHO-110 IP Camera
⚠️ Manual Verification Required
This CVE does not have specific version information in our database, so automatic vulnerability detection cannot determine if your system is affected.
Why? The CVE database entry doesn't specify which versions are vulnerable (no version ranges provided by the vendor/NVD).
🔒 Custom verification scripts are available for registered users. Sign up free to download automated test scripts.
- Review the CVE details at NVD
- Check vendor security advisories for your specific version
- Test if the vulnerability is exploitable in your environment
- Consider updating to the latest version as a precaution
⚠️ Risk & Real-World Impact
Worst Case
Complete compromise of camera surveillance feed, allowing continuous monitoring of private spaces, potential blackmail material collection, or reconnaissance for physical security breaches.
Likely Case
Unauthorized access to camera snapshots enabling privacy violations, monitoring of sensitive areas, and potential data leakage of visual information.
If Mitigated
Limited to authenticated users only, maintaining proper access controls and privacy protections.
🎯 Exploit Status
Exploitation requires only HTTP GET requests to the vulnerable endpoint. Public exploit code is available on Exploit-DB.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: Not available
Restart Required: No
Instructions:
No official patch available from vendor. Check Denver's website for firmware updates or contact vendor support.
🔧 Temporary Workarounds
Block Port 8001
linuxConfigure firewall rules to block external access to TCP port 8001 on affected cameras
iptables -A INPUT -p tcp --dport 8001 -j DROP
Network Segmentation
allIsolate IP cameras on separate VLAN or network segment with restricted access
🧯 If You Can't Patch
- Disable or block the secondary HTTP service on port 8001 using firewall rules
- Place cameras behind VPN or restrict access to trusted IP addresses only
🔍 How to Verify
Check if Vulnerable:
Use curl or web browser to access http://[camera-ip]:8001/snapshot - if it returns an image without authentication, the device is vulnerable.Check Version:
Check camera web interface on port 80 for firmware version information (requires authentication)Verify Fix Applied:
Attempt to access http://[camera-ip]:8001/snapshot - should return authentication error or connection refused after implementing workarounds.📡 Detection & Monitoring
Log Indicators:
- Multiple HTTP GET requests to /snapshot endpoint
- Access attempts to port 8001 from unauthorized sources
Network Indicators:
- Unusual traffic to port 8001
- Image data transfers from camera to unexpected destinations
SIEM Query:
source_ip="camera_ip" AND dest_port=8001 AND http_method=GET AND uri_path="/snapshot"