CVE-2021-4468
📋 TL;DR
PLANEX CS-QP50F-ING2 smart cameras expose an unauthenticated HTTP configuration backup interface. Remote attackers can download backup files containing sensitive credentials, enabling administrative access to the camera and compromising monitored environments. All users of affected cameras are vulnerable.
💻 Affected Systems
- PLANEX CS-QP50F-ING2 Smart 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
Attacker gains full administrative control of camera, accesses live video feeds, modifies settings, uses camera as pivot point into network, and potentially accesses other connected devices.
Likely Case
Attacker obtains camera credentials, accesses video feeds, disables security features, and uses camera for surveillance or as part of botnet.
If Mitigated
Limited to network reconnaissance if camera is isolated and credentials are rotated, but device remains vulnerable to takeover.
🎯 Exploit Status
Simple HTTP GET request to backup endpoint. Exploit code available in public repositories.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Not available
Vendor Advisory: Not available
Restart Required: No
Instructions:
No official patch available. Contact PLANEX support for firmware updates or replacement options.
🔧 Temporary Workarounds
Network Segmentation
allIsolate cameras on separate VLAN with strict firewall rules blocking all inbound HTTP access
HTTP Access Restriction
linuxConfigure firewall to block HTTP access to camera backup endpoints (typically port 80)
iptables -A INPUT -p tcp --dport 80 -j DROP
🧯 If You Can't Patch
- Remove cameras from internet-facing networks immediately
- Change all camera credentials and monitor for unauthorized access
🔍 How to Verify
Check if Vulnerable:
Attempt HTTP GET request to camera IP at /backup.cgi or similar backup endpoints. If configuration file downloads without authentication, device is vulnerable.Check Version:
Check camera web interface or use nmap scanning: nmap -sV -p 80 [camera_ip]Verify Fix Applied:
Test same endpoint after implementing workarounds - should return authentication error or connection refused.📡 Detection & Monitoring
Log Indicators:
- HTTP GET requests to /backup.cgi or similar backup endpoints
- Unauthenticated access to configuration endpoints
- Large file downloads from camera HTTP service
Network Indicators:
- HTTP traffic to camera port 80 from unauthorized sources
- Pattern of backup file downloads
- Unusual outbound traffic from camera after compromise
SIEM Query:
source="camera_logs" AND (uri="/backup.cgi" OR uri CONTAINS "backup") AND status=200