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AUSCERT External Security Bulletin Redistribution
ESB-2022.3462
Advisory (icsa-22-195-04) Siemens Simcenter Femap
15 July 2022
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AusCERT Security Bulletin Summary
---------------------------------
Product: Siemens Simcenter Femap
Publisher: ICS-CERT
Operating System: Network Appliance
Windows
Resolution: Patch/Upgrade
CVE Names: CVE-2022-34748
Original Bulletin:
https://us-cert.cisa.gov/ics/advisories/icsa-22-195-04
Comment: CVSS (Max): 7.8 CVE-2022-34748 (CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H)
CVSS Source: ICS-CERT
Calculator: https://www.first.org/cvss/calculator/3.0#CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
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ICS Advisory (ICSA-22-195-04)
Siemens Simcenter Femap
Original release date: July 14, 2022
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 7.8
o ATTENTION: Low attack complexity
o Vendor: Siemens
o Equipment: Simcenter Femap
o Vulnerability: Out-of-bounds Write
2. RISK EVALUATION
If a user is tricked into opening a malicious file with the affected
application, then this vulnerability could allow remote code execution.
3. TECHNICAL DETAILS
3.1 AFFECTED PRODUCTS
Siemens reports the following versions of Simcenter Femap, a complex model
simulator, are affected:
o All versions prior to v2022.2
3.2 VULNERABILITY OVERVIEW
3.2.1 OUT-OF-BOUNDS WRITE CWE-787
The affected application contains an out-of-bounds write past the end of an
allocated structure while parsing specially crafted X_T files. This could allow
an attacker to execute code in the context of the current process.
CVE-2022-34748 has been assigned to this vulnerability. A CVSS v3 base score of
7.8 has been assigned; the CVSS vector string is ( AV:L/AC:L/PR:N/UI:R/S:U/C:H/
I:H/A:H ).
3.3 BACKGROUND
o CRITICAL INFRASTRUCTURE SECTORS: Critical Manufacturing
o COUNTRIES/AREAS DEPLOYED: Worldwide
o COMPANY HEADQUARTERS LOCATION: Germany
3.4 RESEARCHER
Trend Micro's Zero Day Initiative reported this vulnerability to Siemens.
4. MITIGATIONS
Siemens recommends customers update Simcenter Femap to version 2022.22 or later
. Siemens has identified the following specific workarounds and mitigations
users can apply to reduce the risk:
o Do not open untrusted X_T files in Simcenter Femap.
As a general security measure, Siemens recommends appropriate mechanisms to
protect network access to devices. To operate the devices in a protected IT
environment, Siemens recommends configuring the environment according to
Siemens' operational guidelines for industrial security and following the
product manuals' recommendations.
Additional information on industrial security by Siemens can be found on the
Siemens industrial security webpage .
For more information, see Siemens Security Advisory SSA-474231
CISA recommends users take defensive measures to minimize the risk of
exploitation of this vulnerability these vulnerabilities. Specifically, users
should:
o Minimize network exposure for all control system devices and/or systems,
and ensure they are not accessible from the Internet .
o Locate control system networks and remote devices behind firewalls and
isolate them from business networks.
o When remote access is required, use secure methods, such as Virtual Private
Networks (VPNs), recognizing VPNs may have vulnerabilities and should be
updated to the most current version available. Also recognize VPN is only
as secure as its 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 at cisa.gov/ics . Several CISA products detailing cyber
defense best 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 at cisa.gov/ics in the technical information paper,
ICS-TIP-12-146-01B--Targeted Cyber Intrusion Detection and Mitigation
Strategies .
Organizations observing suspected malicious activity should follow established
internal procedures and report findings to CISA for tracking and correlation
against other incidents.
CISA also recommends users take the following measures to protect themselves
from social engineering attacks:
o Do not click web links or open attachments in unsolicited 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.
No known public exploits specifically target this vulnerability. This
vulnerability is not exploitable remotely.
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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