CVE-2024-50374
📋 TL;DR
This vulnerability allows remote unauthenticated attackers to execute arbitrary operating system commands with root privileges on affected Advantech wireless access points. The exploit targets the default 'edgserver' service's 'capture_packages' operation, requiring no authentication. Organizations using vulnerable Advantech EKI-6333 series access points are affected.
💻 Affected Systems
- Advantech EKI-6333AC-2G
- Advantech EKI-6333AC-2GD
- Advantech EKI-6333AC-1GPO
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise allowing attackers to install persistent backdoors, pivot to internal networks, exfiltrate data, or render devices inoperable.
Likely Case
Attackers gain full control of affected access points to intercept network traffic, modify configurations, or use as footholds for lateral movement.
If Mitigated
If properly segmented and monitored, impact limited to isolated network segments with potential for traffic interception but no lateral movement.
🎯 Exploit Status
The vulnerability is straightforward to exploit as it requires no authentication and has a clear attack vector through the capture_packages operation.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check Advantech security advisory for specific patched versions
Vendor Advisory: https://www.advantech.com/support
Restart Required: Yes
Instructions:
1. Check current firmware version on affected devices
2. Download latest firmware from Advantech support portal
3. Backup current configuration
4. Apply firmware update following vendor instructions
5. Verify update successful and service functionality
🔧 Temporary Workarounds
Disable edgserver service
linuxTemporarily disable the vulnerable service until patching can be completed
ssh admin@device-ip
service edgserver stop
chkconfig edgserver off
Network segmentation and firewall rules
linuxIsolate affected devices and restrict access to edgserver service
iptables -A INPUT -p tcp --dport [edgserver-port] -j DROP
iptables -A INPUT -s trusted-network -p tcp --dport [edgserver-port] -j ACCEPT
🧯 If You Can't Patch
- Immediately isolate affected devices from internet and critical internal networks
- Implement strict network access controls to limit who can communicate with the edgserver service
🔍 How to Verify
Check if Vulnerable:
Check device firmware version via web interface or SSH and compare against affected versionsCheck Version:
ssh admin@device-ip 'cat /etc/version' or check via web interfaceVerify Fix Applied:
Verify firmware version is above vulnerable versions and test that capture_packages operation no longer accepts arbitrary commands📡 Detection & Monitoring
Log Indicators:
- Unusual command execution in system logs
- Multiple failed or successful connections to edgserver service
- Unexpected process creation with root privileges
Network Indicators:
- Unusual traffic patterns to/from affected devices on edgserver port
- Unexpected outbound connections from access points
- Traffic containing shell metacharacters or command injection patterns
SIEM Query:
source="device-logs" AND (process="edgserver" OR command="capture_packages") AND (user="root" OR command="*;*" OR command="*|*")