CVE-2020-25156
📋 TL;DR
This vulnerability allows attackers with cryptographic material to gain root access to B. Braun medical devices due to active debug code left in production systems. Affected devices include SpaceCom Version L8/U61 and Data module compactplus Versions A10 and A11 and earlier. This impacts healthcare organizations using these medical devices for patient monitoring and data management.
💻 Affected Systems
- B. Braun SpaceCom
- B. Braun Data module compactplus
📦 What is this software?
Spacecom by Bbraun
⚠️ Risk & Real-World Impact
Worst Case
Attackers gain full root control of medical devices, potentially manipulating patient data, disrupting medical monitoring, or compromising patient safety through unauthorized device modifications.
Likely Case
Unauthorized access to medical device systems, data exfiltration, and potential disruption of medical monitoring functions in healthcare environments.
If Mitigated
Limited impact if devices are properly segmented, cryptographic material is secured, and network access controls prevent unauthorized connections.
🎯 Exploit Status
Exploitation requires possession of cryptographic material; debug code enables root access when combined with this material.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Contact B. Braun for specific patched versions
Vendor Advisory: https://www.bbraun.com/en/products-and-therapies/services/b-braun-vulnerability-disclosure-policy/security-advisory.html
Restart Required: Yes
Instructions:
1. Contact B. Braun technical support for patched firmware versions. 2. Schedule maintenance window for medical device updates. 3. Backup device configurations. 4. Apply firmware updates following B. Braun's medical device update procedures. 5. Verify device functionality post-update.
🔧 Temporary Workarounds
Network Segmentation
allIsolate affected medical devices on separate network segments with strict access controls
Cryptographic Material Protection
allSecure all cryptographic material and implement strict access controls to prevent unauthorized access
🧯 If You Can't Patch
- Implement strict network segmentation to isolate affected devices from untrusted networks
- Enhance monitoring and logging of device access attempts and cryptographic material usage
🔍 How to Verify
Check if Vulnerable:
Check device firmware versions against affected versions list; contact B. Braun for vulnerability assessment toolsCheck Version:
Check device display or management interface for firmware version informationVerify Fix Applied:
Verify firmware version has been updated to patched version provided by B. Braun; test device functionality📡 Detection & Monitoring
Log Indicators:
- Unauthorized access attempts to medical devices
- Unexpected root-level access events
- Changes to device configurations
Network Indicators:
- Unusual network traffic to/from medical devices
- Attempts to access debug interfaces
SIEM Query:
source="medical_device" AND (event_type="authentication_failure" OR user="root")🔗 References
- https://www.bbraun.com/en/products-and-therapies/services/b-braun-vulnerability-disclosure-policy/security-advisory.html
- https://www.cisa.gov/uscert/ics/advisories/icsma-20-296-02
- https://www.bbraun.com/en/products-and-therapies/services/b-braun-vulnerability-disclosure-policy/security-advisory.html
- https://www.cisa.gov/uscert/ics/advisories/icsma-20-296-02
