CVE-2019-20463
📋 TL;DR
This vulnerability allows remote attackers to cause a denial-of-service (DoS) by sending crafted IP traffic to Sannce Smart HD Wifi Security Cameras. The camera crashes and reboots when specific strings are sent to UDP port 20188, potentially creating extended service disruption if traffic is sent periodically. Only users of the specific Sannce camera model are affected.
💻 Affected Systems
- Sannce Smart HD Wifi Security Camera EAN 2 950004 595317
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Continuous camera reboots rendering the security system unusable for extended periods, potentially creating security blind spots.
Likely Case
Intermittent camera outages disrupting surveillance coverage and requiring manual intervention.
If Mitigated
Minimal impact with proper network segmentation and traffic filtering in place.
🎯 Exploit Status
Simple string-based exploit demonstrated by Nikto scanner. No authentication required.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Not available
Vendor Advisory: Not found in provided references
Restart Required: No
Instructions:
No official patch available. Check manufacturer website for firmware updates.
🔧 Temporary Workarounds
Network Segmentation
allIsolate cameras on separate VLAN or network segment
Firewall Block UDP 20188
linuxBlock inbound UDP traffic to port 20188 from untrusted networks
iptables -A INPUT -p udp --dport 20188 -j DROP
🧯 If You Can't Patch
- Place cameras behind NAT/firewall with strict inbound rules
- Monitor network traffic for patterns of UDP packets to port 20188
🔍 How to Verify
Check if Vulnerable:
Send '111111' string to UDP port 20188 of camera and observe if it reboots (test in controlled environment only)Check Version:
Check camera web interface or manufacturer documentation for firmware versionVerify Fix Applied:
No official fix available to verify📡 Detection & Monitoring
Log Indicators:
- Camera reboot logs
- Unexpected service restarts
Network Indicators:
- UDP packets to port 20188 containing '111111' or similar patterns
- Increased UDP traffic to camera IPs
SIEM Query:
source_port=* dest_port=20188 protocol=UDP AND (payload_contains='111111' OR payload_size=6)