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# SSA-930100: Privilege Escalation Vulnerability in Simcenter STAR-CCM+

Publication Date:        2022-12-13
Last Update:             2023-07-11
Current Version:         1.1
CVSS v3.1 Base Score:    7.8


SUMMARY
=======

Simcenter STAR-CCM+ contains a privilege escalation vulnerability
which could allow a local attacker with an unprivileged account to
override or modify the service executable and subsequently gain
elevated privileges.

Siemens has released an update for Simcenter STAR-CCM+ and recommends
to update to the latest version.


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


* Simcenter STAR-CCM+ 
  - Affected versions:
       All versions < V2306
  - Remediation:
       Update to V2306 or later version
  
       See recommendations from section "Workarounds and Mitigations"
  - Download:
       https://support.sw.siemens.com/en- US/product/226870983/



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

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

  * Remove write permissions for non-administrative users on files and folders
    located under the installation path

Product-specific remediations or mitigations can be found in the section
"Affected Products and Solution".
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 STAR-CCM+ is a multiphysics computational fluid dynamics
(CFD) software for the simulation of products operating under
real-world conditions.

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-2022-43517

  The affected application improperly assigns file permissions to
  installation folders.

    This could allow a local attacker with an unprivileged account to
  override or modify the service executables and subsequently gain
  elevated privileges.

    CVSS v3.1 Base Score: 7.8
    CVSS Vector:          CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C
    CWE:                  CWE-732: Incorrect Permission Assignment for Critical Resource




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

Siemens thanks the following party for its efforts:

   * Craig Carr from University of Glasgow for reporting the vulnerability


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 (2022-12-13): Publication Date
V1.1 (2023-07-11): Added fix for Simcenter STAR-CCM+

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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