CVE-2020-12016
📋 TL;DR
This CVE involves hard-coded administrative credentials in Baxter ExactaMix medical devices, allowing attackers with network access to gain unauthorized system access. Successful exploitation could lead to viewing/updating sensitive files, executing software, and accessing protected health information (PHI). Affected systems include Baxter ExactaMix EM 2400 and EM 1200 devices running vulnerable firmware versions.
💻 Affected Systems
- Baxter ExactaMix EM 2400
- Baxter ExactaMix EM 1200
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise allowing unauthorized access to PHI, modification of medical device configurations, execution of arbitrary code, and potential patient safety impacts.
Likely Case
Unauthorized access to sensitive medical data, system configuration changes, and potential disruption of medical device operations.
If Mitigated
Limited impact if devices are properly segmented and access controlled, though hard-coded credentials remain a persistent threat.
🎯 Exploit Status
Hard-coded credentials make exploitation trivial once network access is obtained. No special tools or skills required beyond basic network scanning and credential testing.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Contact Baxter for updated firmware versions
Vendor Advisory: https://www.us-cert.gov/ics/advisories/icsma-20-170-01
Restart Required: Yes
Instructions:
1. Contact Baxter technical support for updated firmware. 2. Schedule maintenance window. 3. Backup device configurations. 4. Apply firmware update following Baxter's instructions. 5. Verify functionality post-update.
🔧 Temporary Workarounds
Network Segmentation
allIsolate ExactaMix devices on separate VLANs with strict firewall rules limiting access to authorized systems only.
Access Control Lists
allImplement network ACLs to restrict which IP addresses can communicate with ExactaMix devices.
🧯 If You Can't Patch
- Implement strict network segmentation and zero-trust principles for medical device network
- Deploy network monitoring and intrusion detection specifically for medical device traffic
🔍 How to Verify
Check if Vulnerable:
Check device firmware version via device interface or contact Baxter support. Devices with listed versions are vulnerable.Check Version:
Check via device interface or contact Baxter support for version verification procedure.Verify Fix Applied:
Verify firmware has been updated to version not listed in affected versions. Confirm with Baxter that updated firmware addresses CVE-2020-12016.📡 Detection & Monitoring
Log Indicators:
- Multiple failed login attempts followed by successful login
- Unauthorized access attempts to administrative interfaces
- Unusual file access patterns
Network Indicators:
- Unexpected network connections to/from ExactaMix devices
- Traffic patterns indicating credential testing
- Administrative protocol usage from unauthorized sources
SIEM Query:
source_ip IN (medical_device_subnet) AND (event_type="authentication_success" OR event_type="file_access") AND user="admin"