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AUSCERT External Security Bulletin Redistribution
ESB-2023.1212
ICS Advisory | ICSA-23-047-06 Siemens Simcenter Femap before V2023.1
28 February 2023
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AusCERT Security Bulletin Summary
---------------------------------
Product: Siemens Simcenter Femap before V2023.1
Publisher: ICS-CERT
Operating System: Network Appliance
Resolution: Patch/Upgrade
CVE Names: CVE-2022-43397 CVE-2022-39157
Original Bulletin:
https://www.cisa.gov/news-events/ics-advisories/icsa-23-047-06
Comment: CVSS (Max): 7.8 CVE-2022-43397 (CVSS:3.1/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/3.1#CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
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ICS Advisory (ICSA-23-047-06)
Siemens Simcenter Femap before V2023.1
Release Date
February 16, 2023
As of January 10, 2023, CISA will no longer be updating ICS security advisories
for Siemens product vulnerabilities beyond the initial advisory. For the most
up-to-date information on vulnerabilities in this advisory, please see Siemens'
ProductCERT Security Advisories (CERT Services | Services | Siemens Global).
1. EXECUTIVE SUMMARY
o CVSS v3 7.8
o ATTENTION: Low attack complexity
o Vendor: Siemens
o Equipment: Simcenter Femap
o Vulnerabilities: Out-of-bounds Read, Out-of-bounds Write
2. RISK EVALUATION
Successful exploitation of these vulnerabilities could allow an attacker to
execute code in the context of the current process.
3. TECHNICAL DETAILS
3.1 AFFECTED PRODUCTS
The following software from Siemens is affected:
o Simcenter Femap: All versions prior to V2023.1
3.2 VULNERABILITY OVERVIEW
3.2.1 OUT-OF-BOUNDS READ CWE-125
The affected application contains an out-of-bounds read 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-2022-39157 has been assigned to this vulnerability. A CVSS v3 base score of
7.8 has been assigned. The CVSS vector string is ( CVSS:3.1/AV:L/AC:L/PR:N/UI:R
/S:U/C:H/I:H/A:H ).
3.2.2 OUT-OF-BOUNDS WRITE CWE-787
The affected application contains an out-of-bounds write past the end of an
allocated buffer while parsing specially crafted X_T files. This could allow an
attacker to execute code in the context of the current process.
CVE-2022-43397 has been assigned to this vulnerability. A CVSS v3 base score of
7.8 has been assigned. The CVSS vector string is ( CVSS:3.1/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 Zero Day Initiative reported these vulnerabilities to Siemens.
Siemens reported these vulnerabilities to CISA.
4. MITIGATIONS
Siemens has identified the following specific workarounds and mitigations users
can apply to reduce risk:
o Simcenter Femap: Update to V2023.1 or a later version
o Simcenter Femap: Avoid opening untrusted X_T files in Simcenter Femap
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 to configure the
environment according to Siemens' operational guidelines for Industrial
Security and to follow the recommendations in the product manuals. Additional
information on Industrial Security by Siemens can be found at the Siemens
Industrial Security webpage .
For further inquiries on security vulnerabilities in Siemens products and
solutions, users should contact the Siemens ProductCERT .
For more information, see the associated Siemens security advisory SSA-565356
in HTML and CSAF .
CISA recommends users take defensive measures to minimize the risk of
exploitation of 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 these vulnerabilities. These
vulnerabilities are not exploitable remotely.
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