CVE-2023-46706
📋 TL;DR
Multiple MachineSense devices have hardcoded credentials that cannot be changed by users or administrators. This vulnerability allows attackers to gain unauthorized access to affected devices, potentially compromising industrial control systems and operational technology networks.
💻 Affected Systems
- MachineSense devices (specific models not detailed in CVE)
📦 What is this software?
Feverwarn Firmware by Machinesense
⚠️ Risk & Real-World Impact
Worst Case
Complete compromise of industrial control systems leading to operational disruption, safety hazards, data theft, or ransomware deployment across critical infrastructure.
Likely Case
Unauthorized access to device management interfaces allowing configuration changes, data exfiltration, or lateral movement within industrial networks.
If Mitigated
Limited impact if devices are isolated in air-gapped networks with strict access controls and monitoring.
🎯 Exploit Status
Simple credential-based authentication bypass. Attackers only need to discover or guess the hardcoded credentials.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Not applicable - design flaw
Vendor Advisory: https://www.cisa.gov/news-events/ics-advisories/icsa-24-025-01
Restart Required: No
Instructions:
Contact MachineSense for firmware updates or hardware replacement options. No direct patch exists for hardcoded credential issues.
🔧 Temporary Workarounds
Network Segmentation
allIsolate MachineSense devices in separate network segments with strict firewall rules.
Access Control Lists
allImplement network ACLs to restrict access to device management interfaces.
🧯 If You Can't Patch
- Deploy network monitoring and intrusion detection systems to detect credential-based attacks
- Implement multi-factor authentication for all adjacent systems and network jump hosts
🔍 How to Verify
Check if Vulnerable:
Attempt to authenticate to device management interfaces using default credentials. Check if credential change functionality is disabled in device settings.Check Version:
Check device web interface or serial console for firmware version information.Verify Fix Applied:
Verify with vendor if hardware/firmware replacement provides proper credential management. Test authentication with new credentials.📡 Detection & Monitoring
Log Indicators:
- Failed authentication attempts followed by successful logins
- Configuration changes from unexpected sources
- Multiple login attempts from single IP
Network Indicators:
- Unusual traffic to device management ports (HTTP/HTTPS/SSH)
- Traffic patterns indicating credential stuffing
SIEM Query:
source_ip="device_ip" AND (event_type="authentication" OR event_type="configuration_change")