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

# SSA-377318: Multiple vulnerabilities in Intel Active Management Technology (AMT) of
SIMATIC IPCs

Publication Date:        2019-02-12
Last Update:             2020-02-10
Current Version:         1.1
CVSS v3.1 Base Score:    6.7

SUMMARY
=======

There are multiple vulnerabilities in the Intel Management Engine used
in multiple SIMATIC IPC devices that may allow arbitrary code execution,
a partial denial of service or information disclosure. For additional
information see:
https://www.intel.com/content/www/us/en/security-center/advisory/intel-sa-00141.html.

Siemens provides updates for the affected devices.


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


* SIMATIC FieldPG M5 
  - Affected versions:
       All versions < V22.01.06
  - Remediation:
       Update to V22.01.06
  - Download:
       https://support.industry.siemens.com/cs/us/en/view/109747626

* SIMATIC IPC427E (incl. SIPLUS variants) 
  - Affected versions:
       All versions < V21.01.09
  - Remediation:
       Update to V21.01.09
  - Download:
       https://support.industry.siemens.com/cs/us/en/view/109747626

* SIMATIC IPC477E 
  - Affected versions:
       All versions < V21.01.09
  - Remediation:
       Update to V21.01.09
  - Download:
       https://support.industry.siemens.com/cs/us/en/view/109747626

* SIMATIC IPC547E 
  - Affected versions:
       All versions < R1.30.0
  - Remediation:
       Update to R1.30.0
  - Download:
       https://support.industry.siemens.com/cs/us/en/view/109747626

* SIMATIC IPC547G 
  - Affected versions:
       All versions < R1.23.0
  - Remediation:
       Update to R1.23.0
  - Download:
       https://support.industry.siemens.com/cs/us/en/view/109747626

* SIMATIC IPC627D 
  - Affected versions:
       All versions < V19.02.11
  - Remediation:
       Update to V19.02.11
  - Download:
       https://support.industry.siemens.com/cs/us/en/view/109747626

* SIMATIC IPC647D 
  - Affected versions:
       All versions < V19.01.14
  - Remediation:
       Update to V19.01.14
  - Download:
       https://support.industry.siemens.com/cs/us/en/view/109747626

* SIMATIC IPC677D 
  - Affected versions:
       All versions < V19.02.11
  - Remediation:
       Update to V19.02.11
  - Download:
       https://support.industry.siemens.com/cs/us/en/view/109747626

* SIMATIC IPC827D 
  - Affected versions:
       All versions < V19.02.11
  - Remediation:
       Update to V19.02.11
  - Download:
       https://support.industry.siemens.com/cs/us/en/view/109747626

* SIMATIC IPC847D 
  - Affected versions:
       All versions < V19.01.14
  - Remediation:
       Update to V19.01.14
  - Download:
       https://support.industry.siemens.com/cs/us/en/view/109747626

* SIMATIC ITP1000 
  - Affected versions:
       All versions < V23.01.04
  - Remediation:
       Update to V23.01.04
  - Download:
       https://support.industry.siemens.com/cs/us/en/view/109747626


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

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

* As a prerequisite for an attack, an attacker must be able to run
malicious code on affected systems. Therefore, Siemens recommends
determining if it is possible that untrusted code can be run on these
systems, or if existing measures implemented by the operator reduce the
likelihood of untrusted code being run.
  


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

SIMATIC Industrial PCs, SIMATIC FieldPGs and SIMATIC ITPs are the PC
hardware platforms for PC-based Automation from Siemens.

SIPLUS extreme products are designed for reliable operation under
extreme conditions and are based on SIMATIC, LOGO!, SITOP, SINAMICS,
SIMOTION, SCALANCE or other devices. SIPLUS devices use the same
firmware as the product they are based on.

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-2018-3616

  Bleichenbacher-style side channel vulnerability in TLS implementation in
  Intel Active Management Technology before 12.0.5 may allow an
  unauthenticated user to potentially obtain the TLS session key via the
  network.
  
  The security vulnerability could be exploited by an attacker with
  network access to the affected systems. Successful exploitation requires
  no system privileges and no user interaction. An attacker could use the
  vulnerability to compromise confidentiality of the device.

  CVSS v3.1 Base Score: 5.9
  CVSS Vector:          CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N/E:P/RL:O/RC:C
  CWE:                  CWE-310: Cryptographic Issues

* Vulnerability CVE-2018-3657

  Multiple buffer overflows in Intel AMT in Intel CSME firmware versions
  before version 12.0.5 may allow a privileged user to potentially execute
  arbitrary code with Intel AMT execution privilege via local access.
  
  The security vulnerability could be exploited by an attacker with
  network access to the affected systems. Successful exploitation requires
  no system privileges and no user interaction. An attacker could use the
  vulnerability to compromise confidentiality, integrity and availability
  of the device.

  CVSS v3.1 Base Score: 6.7
  CVSS Vector:          CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C
  CWE:                  CWE-20: Improper Input Validation

* Vulnerability CVE-2018-3658

  Multiple memory leaks in Intel AMT in Intel CSME firmware versions
  before 12.0.5 may allow an unauthenticated user with Intel AMT
  provisioned to potentially cause a partial denial of service via network
  access.
  
  The security vulnerability could be exploited by an attacker with
  network access to the affected systems. Successful exploitation requires
  no system privileges and no user interaction. An attacker could use the
  vulnerability to compromise availability of the device.

  CVSS v3.1 Base Score: 5.3
  CVSS Vector:          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:P/RL:O/RC:C
  CWE:                  CWE-401: Improper Release of Memory Before Removing Last Reference ('Memory
Leak')


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

Siemens thanks the following parties for their efforts:

   * Artem Zinenko from Kaspersky for pointing out that SIPLUS should also be mentioned



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 (2019-02-12): Publication Date
V1.1 (2020-02-10): SIPLUS devices now explicitly mentioned in the list of affected products

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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=S1Yh
-----END PGP SIGNATURE-----