CVE-2023-31528
📋 TL;DR
Motorola CX2L Router version 1.0.1 contains a command injection vulnerability in the staticroute_list parameter that allows attackers to execute arbitrary commands on the device. This affects all users of Motorola CX2L Router 1.0.1. Successful exploitation could lead to complete device compromise.
💻 Affected Systems
- Motorola CX2L Router
📦 What is this software?
Cx2l Firmware by Motorola
⚠️ Risk & Real-World Impact
Worst Case
Complete router takeover allowing attacker to intercept all network traffic, install persistent backdoors, pivot to internal networks, and use router as attack platform.
Likely Case
Router compromise leading to network traffic interception, credential theft, and potential lateral movement to connected devices.
If Mitigated
Limited impact if router is behind firewall with restricted management interface access and proper network segmentation.
🎯 Exploit Status
Public GitHub repository contains exploit code. Exploitation requires network access to router management interface.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: Not available
Restart Required: No
Instructions:
No official patch available. Check Motorola support for firmware updates. If update available: 1. Backup current configuration 2. Download latest firmware 3. Upload via web interface 4. Apply update 5. Restore configuration if needed
🔧 Temporary Workarounds
Disable WAN Management Access
allPrevent external access to router management interface
Access router web interface > Advanced > Remote Management > Disable WAN access
Restrict Management Interface Access
allLimit management interface to specific trusted IP addresses
Access router web interface > Security > Access Control > Add allowed IP addresses
🧯 If You Can't Patch
- Replace vulnerable router with updated model or different vendor
- Place router behind dedicated firewall with strict inbound rules blocking management ports
🔍 How to Verify
Check if Vulnerable:
Check router firmware version in web interface: Login > System > Firmware Version. If version is 1.0.1, device is vulnerable.Check Version:
curl -s http://router-ip/status.cgi | grep versionVerify Fix Applied:
Verify firmware version is no longer 1.0.1. Test with known exploit payloads to confirm they no longer work.📡 Detection & Monitoring
Log Indicators:
- Unusual command execution in system logs
- Multiple failed login attempts followed by successful access
- Suspicious entries in route configuration logs
Network Indicators:
- Unusual outbound connections from router
- Traffic to known malicious IPs from router
- Port scans originating from router
SIEM Query:
source="router.log" AND ("staticroute_list" OR "command injection" OR suspicious shell commands)