CVE-2024-39373
📋 TL;DR
TELSAT marKoni FM Transmitters contain a command injection vulnerability (CWE-77) that allows attackers to execute arbitrary commands by manipulating settings. This could grant administrative access to the transmitter system. Organizations using these FM transmitters are affected.
💻 Affected Systems
- TELSAT marKoni FM Transmitters
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Attacker gains full administrative control of the transmitter, potentially disrupting broadcasts, modifying transmission parameters, or using the system as a foothold into connected networks.
Likely Case
Unauthorized access leading to configuration changes, service disruption, or data exfiltration from the transmitter system.
If Mitigated
Limited impact due to network segmentation and access controls preventing exploitation attempts.
🎯 Exploit Status
Exploitation requires access to manipulate settings, suggesting some level of access is needed, but command injection typically has low complexity once access is obtained.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Not specified in advisory; contact TELSAT for updated firmware.
Vendor Advisory: https://www.cisa.gov/news-events/ics-advisories/icsa-24-179-01
Restart Required: Yes
Instructions:
1. Contact TELSAT for the latest firmware patch. 2. Backup current configuration. 3. Apply firmware update following vendor instructions. 4. Restart the transmitter. 5. Verify functionality.
🔧 Temporary Workarounds
Network Segmentation
allIsolate transmitter network from untrusted networks to limit attack surface.
Access Control
allRestrict access to transmitter management interface to authorized IPs only.
🧯 If You Can't Patch
- Implement strict network segmentation to isolate transmitters in a dedicated VLAN.
- Apply firewall rules to block all unnecessary inbound traffic to transmitter management interfaces.
🔍 How to Verify
Check if Vulnerable:
Check firmware version against TELSAT's patched version list; if unpatched and accessible, assume vulnerable.Check Version:
Check via transmitter web interface or CLI (vendor-specific command).Verify Fix Applied:
Confirm firmware version matches or exceeds the patched version provided by TELSAT.📡 Detection & Monitoring
Log Indicators:
- Unusual configuration changes
- Failed login attempts followed by command execution patterns
- Unexpected system commands in logs
Network Indicators:
- Unusual traffic to transmitter management ports (e.g., HTTP/HTTPS)
- Outbound connections from transmitter to unexpected destinations
SIEM Query:
source="transmitter_logs" AND (event="configuration_change" OR command="*;*" OR command="*|*")