CVE-2023-31530
📋 TL;DR
Motorola CX2L Router version 1.0.1 contains a command injection vulnerability in the smartqos_priority_devices parameter that allows attackers to execute arbitrary commands with router privileges. This affects all users of this specific router model and firmware version. Successful exploitation could lead to complete router compromise.
💻 Affected Systems
- Motorola CX2L Router
📦 What is this software?
Cx2l Firmware by Motorola
⚠️ Risk & Real-World Impact
Worst Case
Full router takeover allowing traffic interception, credential theft, network pivoting, and persistent backdoor installation.
Likely Case
Router compromise leading to network disruption, DNS hijacking, or credential harvesting from connected devices.
If Mitigated
Limited impact with proper network segmentation and monitoring detecting anomalous router behavior.
🎯 Exploit Status
Public GitHub repository contains proof-of-concept code; exploitation requires network access to router web interface.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: Not found
Restart Required: Yes
Instructions:
1. Check Motorola support for firmware updates. 2. If update available, download from official source. 3. Backup router configuration. 4. Apply firmware update via web interface. 5. Restart router. 6. Restore configuration if needed.
🔧 Temporary Workarounds
Disable Remote Management
allPrevent external access to router web interface
Access router admin panel -> Advanced -> Remote Management -> Disable
Network Segmentation
allIsolate router management interface to trusted network
Configure firewall rules to restrict access to router IP on ports 80/443
🧯 If You Can't Patch
- Replace vulnerable router with different model/supported firmware
- Implement strict network monitoring for anomalous router traffic and command execution attempts
🔍 How to Verify
Check if Vulnerable:
Check router firmware version in admin interface: System -> Firmware Update -> Current Version should show 1.0.1Check Version:
curl -s http://router-ip/status.cgi | grep versionVerify Fix Applied:
Verify firmware version is no longer 1.0.1; test with controlled command injection attempt (not recommended in production)📡 Detection & Monitoring
Log Indicators:
- Unusual command execution in router logs
- Multiple failed login attempts to admin interface
- Unexpected configuration changes
Network Indicators:
- Anomalous outbound connections from router
- Unexpected traffic to/from router management interface
- DNS queries to suspicious domains from router
SIEM Query:
source="router.log" AND ("command injection" OR "smartqos_priority_devices" OR "unauthorized config change")