CVE-2019-16272
📋 TL;DR
DTEN D5 and D7 video conferencing devices have factory settings that allow attackers to reflash firmware and enable Android Debug Bridge (ADB), providing full device control. This affects all DTEN D5 and D7 devices running firmware versions before 1.3.4. Attackers can exploit this to gain persistent access to the devices.
💻 Affected Systems
- DTEN D5
- DTEN D7
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete device compromise allowing firmware replacement, persistent backdoor installation, credential theft, and use as pivot point into corporate networks
Likely Case
Unauthorized access to device, installation of malware, eavesdropping on meetings, and data exfiltration
If Mitigated
Limited impact if devices are isolated from critical networks and monitored for unusual activity
🎯 Exploit Status
Exploitation requires physical or network access to device. No authentication needed to access factory settings.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 1.3.4 and later
Vendor Advisory: https://www.dten.com/support/security-advisories
Restart Required: Yes
Instructions:
1. Access device settings menu
2. Navigate to System Update
3. Check for updates and install firmware version 1.3.4 or later
4. Reboot device after update completes
🔧 Temporary Workarounds
Network Segmentation
allIsolate DTEN devices on separate VLAN with restricted network access
Physical Security Controls
allRestrict physical access to devices and disable unused ports
🧯 If You Can't Patch
- Disconnect devices from network when not in use for meetings
- Implement strict network monitoring for unusual ADB traffic on port 5555
🔍 How to Verify
Check if Vulnerable:
Check firmware version in device settings. If version is below 1.3.4, device is vulnerableCheck Version:
Navigate to Settings > About Device > Firmware VersionVerify Fix Applied:
Confirm firmware version is 1.3.4 or higher in system settings📡 Detection & Monitoring
Log Indicators:
- Unexpected ADB connections
- Factory reset events
- Firmware update attempts from unknown sources
Network Indicators:
- ADB traffic on port 5555
- Unexpected firmware download traffic
- Unusual outbound connections from DTEN devices
SIEM Query:
source_ip="DTEN_DEVICE_IP" AND (port=5555 OR event_type="factory_reset" OR protocol="adb")