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# SSA-645530: TIFF File Parsing Vulnerability in JT2Go and Teamcenter Visualization
before V13.1.0.3

Publication Date:        2021-06-08
Last Update:             2021-06-08
Current Version:         1.0
CVSS v3.1 Base Score:    7.8

SUMMARY
=======

Siemens has released version V13.1.0.3 for JT2Go and Teamcenter
Visualization to fix a vulnerability that could be triggered when the
products read files in TIFF file format. If a user is tricked to opening
of a malicious file with the affected products, this could lead to
application crash, or potentially arbitrary code execution or data
extraction on the target host system.

Siemens recommends to update to the latest versions and to limit opening
of untrusted files from unknown sources in the affected products.


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


* JT2Go 
  - Affected versions:
       All versions < V13.1.0.3
  - Remediation:
       Update to V13.1.0.3 or later version
  - Download:
       https://www.plm.automation.siemens.com/global/en/products/plm-components/jt2go.html

* Teamcenter Visualization 
  - Affected versions:
       All versions < V13.1.0.3
  - Remediation:
       Update to V13.1.0.3 or later version
  - 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:

* Avoid to open untrusted files from unknown sources in JT2Go and
Teamcenter Visualization



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

JT2Go is a 3D JT viewing tool to allow users to view JT, PDF, Solid
Edge, PLM XML with available JT, VFZ, CGM, and TIF data.

Teamcenter Visualization software enables enterprises to enhance their
product lifecycle management (PLM) environment with a comprehensive
family of visualization solutions. The software enables enterprise users
to access documents, 2D drawings and 3D models in a single environment.

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-2021-27390

  The TIFF_loader.dll library in affected applications lacks proper
  validation of user-supplied data when parsing TIFF 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. (ZDI-CAN-13131)

  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 (2021-06-08): 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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