-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA512

# SSA-979834: Multiple vulnerabilities in Solid Edge

Publication Date:        2021-01-12
Last Update:             2021-01-15
Current Version:         1.1
CVSS v3.1 Base Score:    7.8

SUMMARY
=======

Solid Edge is affected by multiple vulnerabilities that could allow
arbitrary code execution on an affected system. Siemens has released an
update for Solid Edge and recommends to update to the latest version.


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


* Solid Edge SE2020 
  - Affected versions:
       All Versions < SE2020MP12
  - Remediation:
       Update to Version SE2020MP12 or later
  - Download:
       https://support.sw.siemens.com/ (login required)

* Solid Edge SE2021 
  - Affected versions:
       All Versions < SE2021MP2
  - Remediation:
       Update to Version SE2021MP2 or later
  - Download:
       https://support.sw.siemens.com/ (login required)


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

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

* Siemens recommends to limit opening of untrusted files from unknown
sources in Solid Edge
  
* Applying a Defense-in-Depth concept can help to reduce the probability
that untrusted code is run on the system. Siemens recommends to apply
the Defense-in-Depth concept: https://www.siemens.com/industrialsecurity
  


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
===================

Solid Edge is a portfolio of software tools that addresses various
product development processes : 3D design, simulation, manufacturing and
design management.

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-2020-28381

  Affected applications lack proper validation of user-supplied data when
  parsing PAR files. This could result in an out of bounds write into
  uninitialized memory. An attacker could leverage this vulnerability to
  execute code in the context of the current process.

  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-2020-28382

  Affected applications lack proper validation of user-supplied data when
  parsing PAR files. This could result in a out of bounds write past the
  end of an allocated structure. An attacker could leverage this
  vulnerability to execute code in the context of the current process.

  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-2020-28383

  Affected applications lack proper validation of user-supplied data when
  parsing PAR files. This can result in an out of bounds write past the
  memory location that is a read only image address. An attacker could
  leverage this vulnerability to execute code in the context of the
  current process.

  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-2020-28384

  Affected applications lack proper validation of user-supplied data when
  parsing PAR files. This could lead to a stack based buffer overflow. An
  attacker could leverage this vulnerability to execute code in the
  context of the current process.

  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-2020-28386

  Affected applications lack proper validation of user-supplied data when
  parsing DFT files. This could result in an out of bounds write past the
  end of an allocated structure. An attacker could leverage this
  vulnerability to execute code in the context of the current process.

  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-2020-26989

  Affected applications lack proper validation of user-supplied data when
  parsing of PAR files. This could result in a stack based buffer
  overflow. An attacker could leverage this vulnerability to execute code
  in the context of the current process.

  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


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

Siemens thanks the following parties for their efforts:

   * Trend Micro Zero Day Initiative for coordinated disclosure
   * Industrial Control System Cyber Emergency Response Team (ICS-CERT) for coordination efforts



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 (2021-01-12): Publication Date
V1.1 (2021-01-15): Added additional fix version for SolidEdge SE2020

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.
-----BEGIN PGP SIGNATURE-----
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=fuq7
-----END PGP SIGNATURE-----