CVE-2024-44466
📋 TL;DR
COMFAST CF-XR11 routers running firmware V2.7.2 have a command injection vulnerability in the web management interface. Attackers can send specially crafted POST requests to execute arbitrary commands with root privileges. This affects all users of these vulnerable routers.
💻 Affected Systems
- COMFAST CF-XR11
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Full device compromise allowing attackers to install persistent backdoors, intercept all network traffic, pivot to internal networks, or brick the device.
Likely Case
Remote code execution leading to botnet recruitment, credential theft, DNS hijacking, or unauthorized network access.
If Mitigated
Limited impact if device is behind strict firewall rules, not internet-facing, and network segmentation prevents lateral movement.
🎯 Exploit Status
Proof-of-concept code is available in the GitHub repository. Exploitation requires only HTTP POST requests with command injection in the 'iface' parameter.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: Not available
Restart Required: Yes
Instructions:
1. Check COMFAST website for firmware updates. 2. Download latest firmware. 3. Access router admin interface. 4. Navigate to firmware upgrade section. 5. Upload new firmware file. 6. Wait for reboot.
🔧 Temporary Workarounds
Disable web management interface
linuxTurn off the vulnerable web management service if not needed
killall webmgnt
rm /usr/bin/webmgnt
Network isolation
allPlace vulnerable routers in isolated VLAN with strict firewall rules
🧯 If You Can't Patch
- Block external access to router management interface at network perimeter
- Implement strict network segmentation to limit potential lateral movement
🔍 How to Verify
Check if Vulnerable:
Check if /usr/bin/webmgnt exists and responds to POST requests with iface parameter containing command injection payloadsCheck Version:
cat /etc/version or check web interface admin pageVerify Fix Applied:
Verify webmgnt binary has been updated or removed, and test that command injection no longer works📡 Detection & Monitoring
Log Indicators:
- Unusual POST requests to /usr/bin/webmgnt
- Suspicious command execution in system logs
- Multiple failed login attempts followed by successful command execution
Network Indicators:
- HTTP POST requests to router IP on unusual ports containing shell metacharacters in parameters
- Outbound connections from router to suspicious IPs
SIEM Query:
source="router_logs" AND (url="/usr/bin/webmgnt" OR (method="POST" AND uri CONTAINS "iface="))