CVE-2023-51707
📋 TL;DR
CVE-2023-51707 is a critical command injection vulnerability in Array Networks' MotionPro VPN client on AG and vxAG appliances. It allows remote attackers to execute arbitrary commands via specially crafted packets, potentially leading to full system compromise. Affected systems are ArrayOS AG versions before 9.4.0.505, with 9.3.0.259.x versions being unaffected.
💻 Affected Systems
- Array Networks AG Series
- Array Networks vxAG Series
📦 What is this software?
Arrayos Ag by Arraynetworks
⚠️ Risk & Real-World Impact
Worst Case
Complete system takeover, lateral movement through network, data exfiltration, and persistent backdoor installation.
Likely Case
Unauthorized access to VPN-connected systems, credential theft, and network reconnaissance.
If Mitigated
Limited impact with proper network segmentation, but still potential VPN client compromise.
🎯 Exploit Status
Remote exploitation via crafted packets suggests relatively straightforward attack vectors.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 9.4.0.505 or later
Restart Required: Yes
Instructions:
1. Download ArrayOS 9.4.0.505 or later from Array Networks support portal. 2. Backup current configuration. 3. Apply firmware update via web interface or CLI. 4. Reboot appliance. 5. Verify successful update.
🔧 Temporary Workarounds
Disable MotionPro VPN
allTemporarily disable MotionPro VPN service if not essential
# Via CLI: configure terminal
# no vpn motionpro enable
Restrict VPN Access
allLimit VPN access to specific IP ranges using firewall rules
# Configure firewall policies to restrict MotionPro port access
🧯 If You Can't Patch
- Implement strict network segmentation to isolate VPN appliances
- Deploy intrusion detection/prevention systems to monitor for exploit attempts
🔍 How to Verify
Check if Vulnerable:
Check ArrayOS version via web interface or CLI command: show versionCheck Version:
show versionVerify Fix Applied:
Confirm version is 9.4.0.505 or higher using: show version📡 Detection & Monitoring
Log Indicators:
- Unusual MotionPro connection attempts
- Unexpected command execution in system logs
- Failed authentication attempts followed by successful connections
Network Indicators:
- Anomalous traffic patterns to MotionPro ports (typically TCP 443, 992)
- Suspicious packet structures in VPN traffic
SIEM Query:
source="arrayos" AND (event_type="vpn" OR process="motionpro") AND (command_execution OR abnormal_connection)🔗 References
- https://support.arraynetworks.net/prx/001/http/supportportal.arraynetworks.net/documentation/FieldNotice/Array_Networks_Security_Advisory_Command_Injection_Attacks.pdf
- https://support.arraynetworks.net/prx/001/http/supportportal.arraynetworks.net/documentation/FieldNotice/Array_Networks_Security_Advisory_Command_Injection_Attacks.pdf
