CVE-2020-24054
📋 TL;DR
This vulnerability allows remote attackers to execute arbitrary commands as root on Moog EXO Series units by exploiting a command injection flaw in the administration console's 'statusbroadcast' feature. Attackers can bypass argument restrictions using shell variables like ${IFS} to inject malicious commands. This affects Moog EXO Series EXVF5C-2 and EXVP7C2-3 units with exposed administration interfaces.
💻 Affected Systems
- Moog EXO Series EXVF5C-2
- Moog EXO Series EXVP7C2-3
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise with root-level access, allowing attackers to install persistent backdoors, exfiltrate sensitive data, disrupt industrial operations, or pivot to other network segments.
Likely Case
Unauthorized command execution leading to system manipulation, data theft, or service disruption in industrial control environments.
If Mitigated
Limited impact if administration interfaces are properly segmented and access-controlled, though the vulnerability remains present in the software.
🎯 Exploit Status
Exploit details are publicly documented by IOActive researchers. The vulnerability requires no authentication and uses simple command injection techniques.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Contact Moog for specific patched firmware versions
Vendor Advisory: https://ioactive.com/moog-exo-series-multiple-vulnerabilities/
Restart Required: Yes
Instructions:
1. Contact Moog for updated firmware. 2. Backup current configuration. 3. Apply firmware update following vendor instructions. 4. Restart the unit. 5. Verify the fix by testing the statusbroadcast command.
🔧 Temporary Workarounds
Network Segmentation
allIsolate Moog EXO units from untrusted networks and restrict access to administration interfaces
Access Control Lists
linuxImplement strict firewall rules to limit access to administration console ports
iptables -A INPUT -p tcp --dport [admin_port] -s [trusted_ip] -j ACCEPT
iptables -A INPUT -p tcp --dport [admin_port] -j DROP
🧯 If You Can't Patch
- Implement strict network segmentation to isolate affected units from untrusted networks
- Deploy intrusion detection systems to monitor for exploitation attempts and command injection patterns
🔍 How to Verify
Check if Vulnerable:
Check if administration console is accessible and test statusbroadcast command injection using ${IFS} or similar shell variablesCheck Version:
Check firmware version through administration console or contact Moog supportVerify Fix Applied:
Test that statusbroadcast command no longer accepts shell variables or arbitrary command injection after patch📡 Detection & Monitoring
Log Indicators:
- Unusual process execution via statusbroadcast
- Shell variable patterns in administration console logs
- Multiple root-level process spawns
Network Indicators:
- Unexpected connections to administration console ports
- Traffic containing shell variable patterns like ${IFS}
SIEM Query:
source="moog_admin_logs" AND ("statusbroadcast" AND ("${IFS}" OR "$" OR "|" OR ";"))