CVE-2020-25172
📋 TL;DR
CVE-2020-25172 is a critical path traversal vulnerability in B. Braun OnlineSuite that allows unauthenticated attackers to upload or download arbitrary files. This affects OnlineSuite Version AP 3.0 and earlier, primarily impacting healthcare organizations using these medical device management systems.
💻 Affected Systems
- B. Braun OnlineSuite
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise allowing attackers to upload malicious files, execute arbitrary code, steal sensitive medical data, or disrupt critical medical device operations.
Likely Case
Unauthorized file access leading to data exfiltration, system manipulation, or installation of backdoors for persistent access.
If Mitigated
Limited impact with proper network segmentation and access controls preventing external exploitation.
🎯 Exploit Status
Path traversal vulnerabilities are typically easy to exploit once discovered, and unauthenticated access makes this particularly dangerous.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: OnlineSuite Version AP 3.1 or later
Vendor Advisory: https://www.bbraun.com/en/products-and-therapies/services/cybersecurity.html
Restart Required: Yes
Instructions:
1. Contact B. Braun technical support for patch availability. 2. Schedule maintenance window for medical device systems. 3. Apply patch following vendor instructions. 4. Restart affected systems. 5. Verify patch installation.
🔧 Temporary Workarounds
Network Segmentation
allIsolate OnlineSuite systems from untrusted networks and internet access
Access Control Lists
allImplement strict firewall rules to limit access to OnlineSuite systems
🧯 If You Can't Patch
- Implement network segmentation to isolate vulnerable systems from untrusted networks
- Deploy web application firewall (WAF) with path traversal protection rules
🔍 How to Verify
Check if Vulnerable:
Check OnlineSuite version in application interface or contact B. Braun supportCheck Version:
Check through OnlineSuite application interface or system documentationVerify Fix Applied:
Verify OnlineSuite version is AP 3.1 or later and test file upload/download functionality📡 Detection & Monitoring
Log Indicators:
- Unusual file upload/download patterns
- Path traversal patterns in web logs (../ sequences)
- Unauthenticated access attempts to file operations
Network Indicators:
- Unusual file transfer patterns to/from OnlineSuite systems
- HTTP requests containing path traversal sequences
SIEM Query:
source="online_suite_logs" AND (uri="*../*" OR method="POST" AND uri="*/upload*" OR method="GET" AND uri="*/download*")