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AUSCERT External Security Bulletin Redistribution
ESB-2021.3096
Advisory (icsa-21-257-04) Siemens Simcenter Femap
15 September 2021
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AusCERT Security Bulletin Summary
---------------------------------
Product: Siemens Simcenter Femap
Publisher: ICS-CERT
Operating System: Windows
Impact/Access: Access Confidential Data -- Existing Account
Resolution: Patch/Upgrade
CVE Names: CVE-2021-37176
Original Bulletin:
https://us-cert.cisa.gov/ics/advisories/icsa-21-257-04
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ICS Advisory (ICSA-21-257-04)
Siemens Simcenter Femap
Original release date: September 14, 2021
Legal Notice
All information products included in https://us-cert.cisa.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://us-cert.cisa.gov/tlp/ .
1. EXECUTIVE SUMMARY
o CVSS v3 3.3
o ATTENTION: Low attack complexity
o Vendor: Siemens
o Equipment: Simcenter Femap
o Vulnerability: Out-of-bounds Read
2. RISK EVALUATION
Successful exploitation of this vulnerability could allow an attacker to leak
information in the context of the current process.
3. TECHNICAL DETAILS
3.1 AFFECTED PRODUCTS
The following versions of Simcenter Femap, a simulation application, are
affected:
o Simcenter Femap v2020.2: All versions
o Simcenter Femap v2021.1: All versions
3.2 VULNERABILITY OVERVIEW
3.2.1 OUT-OF-BOUNDS READ CWE-125
The affected application lacks proper validation of user-supplied data when
parsing modfem files. This could result in an out-of-bounds read past the end
of an allocated buffer.
CVE-2021-37176 has been assigned to this vulnerability. A CVSS v3 base score of
3.3 has been calculated; the CVSS vector string is ( AV:L/AC:L/PR:N/UI:R/S:U/
C:L/I:N/A:N ).
3.3 BACKGROUND
o CRITICAL INFRASTRUCTURE SECTORS: Critical Manufacturing
o COUNTRIES/AREAS DEPLOYED: Worldwide
o COMPANY HEADQUARTERS LOCATION: Germany
3.4 RESEARCHER
xina1i, working with Trend Micro's Zero Day Initiative, reported this
vulnerability to CISA.
4. MITIGATIONS
Siemens has recommended the following:
o Update to v2021.2 or later version .
o Do not open untrusted modfem files from unknown sources.
As a general security measure, Siemens strongly recommends users protect
network access to devices with appropriate mechanisms. In order to operate the
devices in a protected IT environment, Siemens recommends users configure the
environment according to Siemens operational guidelines for industrial security
and follow the recommendations in the product manual.
Additional information on industrial security by Siemens can be found at:
https://www.siemens.com/industrialsecurity
For more information see Siemens Security Advisory SSA-997732
CISA recommends users take the following measures to protect themselves from
social engineering attacks:
o Do not click web links or open unsolicited attachments in email messages.
o Refer to Recognizing and Avoiding Email Scams for more information on
avoiding email scams.
o Refer to Avoiding Social Engineering and Phishing Attacks for more
information on social engineering attacks.
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.
This vulnerability is not exploitable remotely. No known public exploits
specifically target this vulnerability.
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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