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# SSA-565356: X_T File Parsing Vulnerabilities in Simcenter Femap before V2023.1

Publication Date:        2023-02-14
Last Update:             2023-02-14
Current Version:         1.0
CVSS v3.1 Base Score:    7.8


SUMMARY
=======

Simcenter Femap is affected by out of bounds read/write
vulnerabilities that could be triggered when the application reads
files in X_T format. If a user is tricked to open a malicious file
with the affected applications, an attacker could leverage the
vulnerability to perform remote code execution in the context of the
current process.

Siemens has released updates for the affected products and recommends
to update to the latest versions.


AFFECTED PRODUCTS AND SOLUTION
==============================


* Simcenter Femap 
  - Affected versions:
       All versions < V2023.1
  - Remediation:
       Update to V2023.1 or later version
  
       See recommendations from section "Workarounds and Mitigations"
  - Download:
       https://support.sw.siemens.com/



WORKAROUNDS AND MITIGATIONS
===========================

Siemens has identified the following specific workarounds and mitigations that
customers can apply to reduce the risk:

  * Do not open untrusted X_T files in Simcenter Femap

Please follow the "General Security Recommendations".

GENERAL SECURITY RECOMMENDATIONS
================================

As a general security measure, Siemens strongly recommends to 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 (Download:

https://www.siemens.com/cert/operational-guidelines-industrial-
security), and to follow the recommendations in the product manuals.
Additional information on Industrial Security by Siemens can be found
at: https://www.siemens.com/industrialsecurity


PRODUCT DESCRIPTION
===================

Simcenter Femap is an advanced simulation application for creating,
editing, and inspecting finite element models of complex products or
systems.

VULNERABILITY CLASSIFICATION
============================

The vulnerability classification has been performed by using the CVSS scoring
system in version 3.1 (CVSS v3.1) (https://www.first.org/cvss/). The CVSS
environmental score is specific to the customer's environment and will impact
the overall CVSS score. The environmental score should therefore be
individually defined by the customer to accomplish final scoring.

An additional classification has been performed using the CWE classification, a
community-developed list of common software security weaknesses. This serves as
a common language and as a baseline for weakness identification, mitigation,
and prevention efforts. A detailed list of CWE classes can be found at:
https://cwe.mitre.org/.



* Vulnerability CVE-2022-39157

  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. (ZDI-CAN-17745)

    CVSS v3.1 Base Score: 7.8
    CVSS Vector:          CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C
    CWE:                  CWE-125: Out-of-bounds Read

* Vulnerability CVE-2022-43397

  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. (ZDI-CAN-17854)

    CVSS v3.1 Base Score: 7.8
    CVSS Vector:          CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C
    CWE:                  CWE-787: Out-of-bounds Write




ACKNOWLEDGMENTS
===============

Siemens thanks the following party for its efforts:

   * Trend Micro Zero Day Initiative for coordinated disclosure of CVE-2022-39157 and CVE-2022-43397


ADDITIONAL INFORMATION
======================

For further inquiries on security vulnerabilities in Siemens products and
solutions, please contact the Siemens ProductCERT:

https://www.siemens.com/cert/advisories


HISTORY DATA
============

V1.0 (2023-02-14): Publication Date

TERMS OF USE
============

Siemens Security Advisories are subject to the terms and conditions contained
in Siemens' underlying license terms or other applicable agreements previously
agreed to with Siemens (hereinafter "License Terms"). To the extent applicable
to information, software or documentation made available in or through a
Siemens Security Advisory, the Terms of Use of Siemens' Global Website
(https://www.siemens.com/terms_of_use, hereinafter "Terms of Use"), in
particular Sections 8-10 of the Terms of Use, shall apply additionally. In case
of conflicts, the License Terms shall prevail over the Terms of Use.

Copyright: Siemens 2023
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