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# SSA-609880: File Parsing Vulnerabilities in Simcenter Femap before V2022.1

Publication Date:        2022-02-08
Last Update:             2022-02-08
Current Version:         1.0
CVSS v3.1 Base Score:    7.8

SUMMARY
=======

Siemens Simcenter Femap is affected by multiple vulnerabilities that
could be triggered when the application reads files in .NEU format. If a
user is tricked to open a malicious file with the affected application,
an attacker could leverage the vulnerability to leak information or
potentially perform remote code execution in the context of the current
process.

Siemens recommends to update to the latest version line of Simcenter
Femap and to avoid opening of untrusted files from unknown sources.


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


* Simcenter Femap V2020.2
  - Affected versions:
       All versions
  - Remediation:
       Update to V2022.1 or later version
       See further recommendations from section "Workarounds and Mitigations"
  - Download:
       https://support.sw.siemens.com/

* Simcenter Femap V2021.1
  - Affected versions:
       All versions
  - Remediation:
       Update to V2022.1 or later version
       See further 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 NEU files in Simcenter Femap



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-2021-46151

  Affected application contains an out of bounds write past the end of an
  allocated structure while parsing specially crafted NEU files. This
  could allow an attacker to execute code in the context of the current
  process. (ZDI-CAN-14754, ZDI-CAN-15082)

  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

* Vulnerability CVE-2021-46152

  Affected application contains a type confusion vulnerability while
  parsing NEU files. This could allow an attacker to execute code in the
  context of the current process. (ZDI-CAN-14643, ZDI-CAN-14644,
  ZDI-CAN-14755, ZDI-CAN-15183)

  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-843: Access of Resource Using Incompatible Type ('Type Confusion')

* Vulnerability CVE-2021-46153

  Affected application contains a memory corruption vulnerability while
  parsing NEU files. This could allow an attacker to execute code in the
  context of the current process. (ZDI-CAN-14645, ZDI-CAN-15305,
  ZDI-CAN-15589, ZDI-CAN-15599)

  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-119: Improper Restriction of Operations within the Bounds of a Memory Buffer

* Vulnerability CVE-2021-46154

  Affected application contains a stack based buffer overflow
  vulnerability while parsing NEU files. This could allow an attacker to
  execute code in the context of the current process. (ZDI-CAN-14646,
  ZDI-CAN-14679, ZDI-CAN-15084, ZDI-CAN-15304)

  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-121: Stack-based Buffer Overflow

* Vulnerability CVE-2021-46155

  Affected application contains a stack based buffer overflow
  vulnerability while parsing NEU files. This could allow an attacker to
  execute code in the context of the current process. (ZDI-CAN-14683,
  ZDI-CAN-15283, ZDI-CAN-15303, ZDI-CAN-15593)

  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-121: Stack-based Buffer Overflow

* Vulnerability CVE-2021-46156

  Affected application contains an out of bounds write past the end of an
  allocated structure while parsing specially crafted NEU files. This
  could allow an attacker to execute code in the context of the current
  process. (ZDI-CAN-14684)

  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

* Vulnerability CVE-2021-46157

  Affected application contains a memory corruption vulnerability while
  parsing NEU files. This could allow an attacker to execute code in the
  context of the current process. (ZDI-CAN-14757)

  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-119: Improper Restriction of Operations within the Bounds of a Memory Buffer

* Vulnerability CVE-2021-46158

  Affected application contains a stack based buffer overflow
  vulnerability while parsing NEU files. This could allow an attacker to
  execute code in the context of the current process. (ZDI-CAN-15085,
  ZDI-CAN-15289, ZDI-CAN-15602)

  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-121: Stack-based Buffer Overflow

* Vulnerability CVE-2021-46159

  Affected application contains an out of bounds write past the end of an
  allocated structure while parsing specially crafted NEU files. This
  could allow an attacker to execute code in the context of the current
  process. (ZDI-CAN-15050)

  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

* Vulnerability CVE-2021-46160

  Affected application contains an out of bounds write past the end of an
  allocated structure while parsing specially crafted NEU files. This
  could allow an attacker to execute code in the context of the current
  process. (ZDI-CAN-15286)

  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

* Vulnerability CVE-2021-46161

  Affected application contains an out of bounds write past the end of an
  allocated structure while parsing specially crafted NEU files. This
  could allow an attacker to execute code in the context of the current
  process. (ZDI-CAN-15302)

  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 parties for their efforts:

   * Trend Micro Zero Day Initiative for coordinated disclosure



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 (2022-02-08): 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.
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