CVE-2019-10661
📋 TL;DR
This vulnerability allows attackers to gain root access to Grandstream GXV3611IR_HD devices because the root account has no password. This affects all users of these devices running firmware versions before 1.0.3.23.
💻 Affected Systems
- Grandstream GXV3611IR_HD
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete device compromise allowing attackers to install malware, pivot to internal networks, disable security features, or use device as botnet node.
Likely Case
Unauthorized root access leading to device configuration changes, surveillance disruption, or credential theft.
If Mitigated
Limited impact if device is isolated in secure network segment with strict access controls.
🎯 Exploit Status
Exploitation requires only SSH/Telnet access to device. Public exploit scripts available on GitHub.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 1.0.3.23 or later
Vendor Advisory: https://www.grandstream.com/support/security-advisories
Restart Required: Yes
Instructions:
1. Download firmware 1.0.3.23 or later from Grandstream support portal. 2. Log into device web interface. 3. Navigate to Maintenance > Upgrade. 4. Upload firmware file. 5. Click Upgrade and wait for reboot.
🔧 Temporary Workarounds
Set root password manually
linuxManually set a strong password for root account via SSH/Telnet
passwd root
Disable remote access
linuxDisable SSH/Telnet services if not required
service ssh stop
service telnet stop
🧯 If You Can't Patch
- Isolate device in separate VLAN with strict firewall rules
- Implement network segmentation to limit device access to authorized IPs only
🔍 How to Verify
Check if Vulnerable:
Attempt SSH/Telnet login as root with empty password. If successful, device is vulnerable.Check Version:
cat /etc/versionVerify Fix Applied:
Attempt SSH/Telnet login as root with empty password. Should fail. Check firmware version is 1.0.3.23 or higher.📡 Detection & Monitoring
Log Indicators:
- Failed SSH/Telnet authentication attempts
- Successful root login without password
- Multiple root login attempts from same source
Network Indicators:
- SSH/Telnet connections to device from unexpected sources
- Unusual outbound traffic from device
SIEM Query:
source="device_logs" (event="authentication success" AND user="root" AND password="") OR (event="ssh connection" AND user="root")