CVE-2023-47415
📋 TL;DR
CVE-2023-47415 is an OS command injection vulnerability in Cypress Solutions CTM-200 devices that allows attackers to execute arbitrary commands on the system. This affects CTM-200 v2.7.1.5600 and below. Attackers can exploit this via the cli_text parameter to gain unauthorized access and control.
💻 Affected Systems
- Cypress Solutions CTM-200
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Full system compromise allowing complete control of the CTM-200 device, data exfiltration, lateral movement to connected systems, and persistent backdoor installation.
Likely Case
Unauthorized command execution leading to device configuration changes, service disruption, credential theft, and potential access to connected networks.
If Mitigated
Limited impact with proper network segmentation, but still potential for device compromise and service disruption.
🎯 Exploit Status
Exploitation requires network access to the CTM-200 web interface. The vulnerability is in a parameter that accepts user input without proper sanitization.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: v2.7.1.5601 or later
Vendor Advisory: http://ctm-200.com (check for security advisories)
Restart Required: Yes
Instructions:
1. Download latest firmware from vendor site. 2. Backup current configuration. 3. Upload firmware via web interface. 4. Apply firmware update. 5. Reboot device. 6. Restore configuration if needed.
🔧 Temporary Workarounds
Network Access Restriction
linuxRestrict access to CTM-200 web interface to trusted IP addresses only
iptables -A INPUT -p tcp --dport 80 -s TRUSTED_IP -j ACCEPT
iptables -A INPUT -p tcp --dport 443 -s TRUSTED_IP -j ACCEPT
iptables -A INPUT -p tcp --dport 80 -j DROP
iptables -A INPUT -p tcp --dport 443 -j DROP
Web Interface Disable
linuxTemporarily disable web interface if not required for operations
systemctl stop httpd
systemctl disable httpd
🧯 If You Can't Patch
- Implement strict network segmentation to isolate CTM-200 devices from critical systems
- Deploy web application firewall (WAF) rules to block command injection patterns in cli_text parameter
🔍 How to Verify
Check if Vulnerable:
Check firmware version via web interface at System > About or via SSH with 'cat /etc/version'Check Version:
cat /etc/versionVerify Fix Applied:
Confirm firmware version is v2.7.1.5601 or later and test cli_text parameter with injection attempts📡 Detection & Monitoring
Log Indicators:
- Unusual command execution in system logs
- Multiple failed login attempts followed by successful access
- Suspicious CLI commands from web interface source
Network Indicators:
- Unusual outbound connections from CTM-200 device
- Traffic to known malicious IPs
- Abnormal HTTP requests to cli_text endpoint
SIEM Query:
source="ctm-200" AND (http_uri="*cli_text*" AND http_query="*;*" OR http_query="*|*" OR http_query="*`*" OR http_query="*$(*")