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             AUSCERT External Security Bulletin Redistribution

                               ESB-2022.1048
       Advisory (icsa-22-069-05) Siemens Simcenter STAR-CCM+ Viewer
                               11 March 2022

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        AusCERT Security Bulletin Summary
        ---------------------------------

Product:           Siemens Simcenter STAR-CCM+ Viewer
Publisher:         ICS-CERT
Operating System:  Network Appliance
Resolution:        Patch/Upgrade
CVE Names:         CVE-2022-24661  

Original Bulletin: 
   https://us-cert.cisa.gov/ics/advisories/icsa-22-069-05

Comment: CVSS (Max):  7.8 CVE-2022-24661 (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-22-069-05)

Siemens Simcenter STAR-CCM+ Viewer

Original release date: March 10, 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 STAR-CCM+ Viewer
  o Vulnerability: Improper Restriction of Operations within the Bounds of a
    Memory Buffer

2. RISK EVALUATION

Successful exploitation of this vulnerability could cause a crash, arbitrary
code execution, or data exfiltration.

3. TECHNICAL DETAILS

3.1 AFFECTED PRODUCTS

The following versions of Simcenter STAR-CCM+ Viewer, a computational fluid
dynamics software, are affected:

  o Simcenter STAR-CCM+ Viewer: All versions prior to 2022.1

3.2 VULNERABILITY OVERVIEW

3.2.1 IMPROPER RESTRICTION OF OPERATIONS WITHIN THE BOUNDS OF A MEMORY BUFFER
CWE-119

The starview+.exe allows a corruption vulnerability while parsing specially
crafted .SCE files. This could allow an attacker to execute code in the context
of the current process.

CVE-2022-24661 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

Jin Huang from ADLab of Venustech reported this vulnerability to Siemens.

4. MITIGATIONS

Siemens has identified the following mitigations and workarounds users can
apply to reduce the risk:

  o Update to 2022.1 or later version
  o Do not open untrusted scene files from unknown sources

As a general security measure, Siemens strongly recommends protecting network
access to devices with appropriate mechanisms. In order 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 recommendations in the product manuals. Additional information on
Industrial Security by Siemens can be found at: https://www.siemens.com/
industrialsecurity

For more information see Siemens Security Advisory SSA-166747

CISA recommends users take defensive measures to minimize the risk of
exploitation of this vulnerability. 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 the business network.
  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 on 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 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.

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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