CVE-2024-12248
📋 TL;DR
The Contec Health CMS8000 Patient Monitor has a critical vulnerability (CVE-2024-12248) that allows attackers to send specially crafted UDP packets to write arbitrary data beyond intended memory boundaries. This out-of-bounds write vulnerability could lead to remote code execution, potentially compromising patient monitoring systems. Healthcare organizations using these devices are affected.
💻 Affected Systems
- Contec Health CMS8000 Patient Monitor
⚠️ Manual Verification Required
This CVE does not have specific version information in our database, so automatic vulnerability detection cannot determine if your system is affected.
Why? The CVE database entry doesn't specify which versions are vulnerable (no version ranges provided by the vendor/NVD).
🔒 Custom verification scripts are available for registered users. Sign up free to download automated test scripts.
- Review the CVE details at NVD
- Check vendor security advisories for your specific version
- Test if the vulnerability is exploitable in your environment
- Consider updating to the latest version as a precaution
⚠️ Risk & Real-World Impact
Worst Case
Full system compromise allowing attacker to execute arbitrary code, manipulate patient monitoring data, disrupt critical healthcare operations, or pivot to other hospital systems.
Likely Case
Remote code execution leading to device compromise, data manipulation, or denial of service affecting patient monitoring capabilities.
If Mitigated
Limited impact if devices are properly segmented and network controls prevent unauthorized UDP traffic to vulnerable ports.
🎯 Exploit Status
Exploitation requires sending specially crafted UDP packets to vulnerable ports. No authentication required.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check with Contec Health for specific firmware version
Vendor Advisory: https://www.cisa.gov/news-events/ics-medical-advisories/icsma-25-030-01
Restart Required: Yes
Instructions:
1. Contact Contec Health for updated firmware. 2. Schedule maintenance window. 3. Backup device configuration. 4. Apply firmware update following vendor instructions. 5. Verify update success and restore configuration if needed.
🔧 Temporary Workarounds
Network Segmentation
allIsolate patient monitors on separate VLANs with strict firewall rules
UDP Port Blocking
allBlock UDP traffic to vulnerable ports on patient monitor interfaces
🧯 If You Can't Patch
- Segment devices on isolated medical device networks with strict access controls
- Implement network monitoring and intrusion detection for UDP traffic to patient monitors
🔍 How to Verify
Check if Vulnerable:
Check device firmware version against vendor advisory. Monitor for unexpected UDP traffic on patient monitor ports.Check Version:
Check device display or management interface for firmware version informationVerify Fix Applied:
Verify firmware version matches patched version from vendor. Test that specially crafted UDP packets no longer cause issues.📡 Detection & Monitoring
Log Indicators:
- Unexpected UDP traffic to patient monitor ports
- Device reboot or crash events
- Unusual network activity from medical devices
Network Indicators:
- UDP packets with unusual patterns to port 161 (SNMP) or other patient monitor ports
- Traffic from unauthorized sources to medical devices
SIEM Query:
source_ip != authorized_medical_network AND dest_port IN (161, other_monitor_ports) AND protocol=UDP