CVE-2019-20465
📋 TL;DR
This vulnerability allows unauthenticated attackers to control the pan/zoom/tilt functionality of Sannce Smart HD Wifi Security Cameras via telnet without a password. It affects users of specific Sannce camera models with the vulnerable firmware. Attackers can remotely manipulate camera positioning and potentially disrupt surveillance coverage.
💻 Affected Systems
- Sannce Smart HD Wifi Security Camera EAN 2 950004 595317
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Attackers could reposition cameras to avoid surveillance, monitor private areas, or disable security monitoring entirely, potentially facilitating physical security breaches.
Likely Case
Unauthorized users reposition cameras to avoid detection or invade privacy by pointing cameras at sensitive areas.
If Mitigated
With proper network segmentation and telnet disabled, cameras remain functional with their intended surveillance coverage intact.
🎯 Exploit Status
Simple telnet connection without credentials allows immediate control of camera functions.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: Not found in provided references
Restart Required: No
Instructions:
No official patch available. Contact Sannce support for firmware updates or replacement options.
🔧 Temporary Workarounds
Disable Telnet Service
allDisable telnet service on the camera to prevent unauthenticated access
telnet localhost 23 (to verify service)
Check camera admin interface for service management
Network Segmentation
linuxIsolate cameras on separate VLAN with strict firewall rules
iptables -A INPUT -p tcp --dport 23 -j DROP
Configure VLAN segmentation on network switch
🧯 If You Can't Patch
- Physically disconnect cameras from internet and place on isolated network
- Replace vulnerable cameras with models from vendors providing security updates
🔍 How to Verify
Check if Vulnerable:
Attempt telnet connection to camera IP on port 23 without credentials. If connection succeeds and provides shell access, device is vulnerable.Check Version:
Check camera admin interface or telnet banner for firmware version informationVerify Fix Applied:
Attempt telnet connection after remediation. Connection should be refused or require authentication.📡 Detection & Monitoring
Log Indicators:
- Failed telnet authentication attempts
- Successful telnet connections from unauthorized IPs
- Camera position change logs without user action
Network Indicators:
- Telnet traffic (port 23) to camera devices
- Unusual camera control commands over network
SIEM Query:
source_ip="*" AND destination_port=23 AND protocol="TCP" AND (event_type="connection_successful" OR bytes_transferred>0)