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AUSCERT External Security Bulletin Redistribution
ESB-2020.3660
Advisory (icsma-20-296-01) B. Braun OnlineSuite
23 October 2020
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AusCERT Security Bulletin Summary
---------------------------------
Product: B. Braun OnlineSuite
Publisher: ICS-CERT
Operating System: Network Appliance
Impact/Access: Execute Arbitrary Code/Commands -- Existing Account
Increased Privileges -- Existing Account
Create Arbitrary Files -- Remote/Unauthenticated
Read-only Data Access -- Remote/Unauthenticated
Reduced Security -- Existing Account
Resolution: Patch/Upgrade
CVE Names: CVE-2020-25174 CVE-2020-25172 CVE-2020-25170
Original Bulletin:
https://us-cert.cisa.gov/ics/advisories/icsma-20-296-01
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ICS Medical Advisory (ICSMA-20-296-01)
B. Braun OnlineSuite
Original release date: October 22, 2020
Legal Notice
All information products included in https://us-cert.gov/ics are provided"as
is" for informational purposes only. The Department of Homeland Security (DHS)
does not provide any warranties of any kind regarding any information contained
within. DHS does not endorse any commercial product or service, referenced in
this product or otherwise. Further dissemination of this product is governed by
the Traffic Light Protocol (TLP) marking in the header. For more information
about TLP, see https://www.us-cert.gov/tlp/ .
1. EXECUTIVE SUMMARY
o CVSS v3 8.6
o ATTENTION: Exploitable remotely/low and high skill level to exploit
o Vendor: B. Braun Melsungen AG
o Equipment: OnlineSuite
o Vulnerabilities: Relative Path Traversal, Uncontrolled Search Path Element,
Improper Neutralization of Formula Elements in a CSV File
2. RISK EVALUATION
Successful exploitation of these vulnerabilities could allow an attacker to
escalate privileges, download and upload arbitrary files, and perform remote
code execution.
3. TECHNICAL DETAILS
3.1 AFFECTED PRODUCTS
The following versions of OnlineSuite are affected:
o AP 3.0 and earlier
3.2 VULNERABILITY OVERVIEW
3.2.1 RELATIVE PATH TRAVERSAL CWE-23
A relative path traversal attack in the B. Braun OnlineSuite Version AP 3.0 and
earlier allows unauthenticated attackers to upload or download arbitrary files.
CVE-2020-25172 has been assigned to this vulnerability. A CVSS v3 base score of
8.6 has been assigned; the CVSS vector string is ( AV:N/AC:L/PR:N/UI:N/S:U/C:L/
I:H/A:L ).
3.2.2 UNCONTROLLED SEARCH PATH ELEMENT CWE-427
A DLL hijacking vulnerability in the B. Braun OnlineSuite Version AP 3.0 and
earlier allows local attackers to execute code on the system as a high
privileged user.
CVE-2020-25174 has been assigned to this vulnerability. A CVSS v3 base score of
8.4 has been assigned; the CVSS vector string is ( AV:L/AC:L/PR:N/UI:N/S:U/C:H/
I:H/A:H ).
3.2.3 IMPROPER NEUTRALIZATION OF FORMULA ELEMENTS IN A CSV FILE CWE-1236
An Excel Macro Injection vulnerability exists in the export feature in the B.
Braun OnlineSuite Version AP 3.0 and earlier via multiple input fields that are
mishandled in an Excel export.
CVE-2020-25170 has been assigned to this vulnerability. A CVSS v3 base score of
6.9 has been assigned; the CVSS vector string is ( AV:N/AC:L/PR:H/UI:R/S:C/C:L/
I:H/A:N ).
3.3 BACKGROUND
o CRITICAL INFRASTRUCTURE SECTORS: Healthcare and Public Health
o COUNTRIES/AREAS DEPLOYED: Worldwide
o COMPANY HEADQUARTERS LOCATION: Germany
3.4 RESEARCHER
Julian Suleder, Nils Emmerich, and Birk Kauer of ERNW Research GmbH; Dr. Oliver
Matula of ERNW Enno Rey Netzwerke GmbH, reported these vulnerabilities to the
Federal Office for Information Security (BSI), Germany, in the context of the
BSI project ManiMed (Manipulation of medical devices).
4. MITIGATIONS
B. Braun recommends applying the following update:
o OnlineSuite Field Service Information AIS06/20
Please contact your local B. Braun organization to request further help. For
more information please see the B. Braun Security Advisory .
CISA recommends users take defensive measures to minimize the risk of
exploitation of this vulnerability. Specifically, users should:
o Minimize network exposure for all control system devices and/or systems,
and ensure that they are not accessible from the Internet .
o Locate control system networks and remote devices behind firewalls, and
isolate them from the business network.
o When remote access is required, use secure methods, such as Virtual Private
Networks (VPNs), recognizing that VPNs may have vulnerabilities and should
be updated to the most current version available. Also recognize that VPN
is only as secure as the connected devices.
CISA reminds organizations to perform proper impact analysis and risk
assessment prior to deploying defensive measures.
CISA also provides a section for control systems security recommended practices
on the ICS webpage on us-cert.cisa.gov . Several recommended practices are
available for reading and download, including Improving Industrial Control
Systems Cybersecurity with Defense-in-Depth Strategies .
Additional mitigation guidance and recommended practices are publicly available
on the ICS webpage on us-cert.cisa.gov in the Technical Information Paper,
ICS-TIP-12-146-01B--Targeted Cyber Intrusion Detection and Mitigation
Strategies .
Organizations observing any suspected malicious activity should follow their
established internal procedures and report their findings to CISA for tracking
and correlation against other incidents.
No known public exploits specifically target these vulnerabilities.
For any questions related to this report, please contact the CISA at:
Email: CISAservicedesk@cisa.dhs.gov
Toll Free: 1-888-282-0870
CISA continuously strives to improve its products and services. You can help by
choosing one of the links below to provide feedback about this product.
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NOTE: Third Party Rights
This security bulletin is provided as a service to AusCERT's members. As
AusCERT did not write the document quoted above, AusCERT has had no control
over its content. The decision to follow or act on information or advice
contained in this security bulletin is the responsibility of each user or
organisation, and should be considered in accordance with your organisation's
site policies and procedures. AusCERT takes no responsibility for consequences
which may arise from following or acting on information or advice contained in
this security bulletin.
NOTE: This is only the original release of the security bulletin. It may
not be updated when updates to the original are made. If downloading at
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from the author's website to ensure that the information is still current.
Contact information for the authors of the original document is included
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Previous advisories and external security bulletins can be retrieved from:
https://www.auscert.org.au/bulletins/
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Australian Computer Emergency Response Team
The University of Queensland
Brisbane
Qld 4072
Internet Email: auscert@auscert.org.au
Facsimile: (07) 3365 7031
Telephone: (07) 3365 4417 (International: +61 7 3365 4417)
AusCERT personnel answer during Queensland business hours
which are GMT+10:00 (AEST).
On call after hours for member emergencies only.
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The post ESB-2020.3660 – [Appliance] B. Braun OnlineSuite: Multiple vulnerabilities appeared first on Malware Devil.
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