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# SSA-580125: Multiple Vulnerabilities in SIMATIC eaSie

Publication Date:        2022-07-12
Last Update:             2022-08-09
Current Version:         1.1
CVSS v3.1 Base Score:    10.0


SUMMARY
=======

SIMATIC eaSie contains multiple vulnerabilities that could allow an
attacker to send arbitrary messages to the underlying message passing
framework of the affected system or crash the attached application.
Siemens has released an update for the SIMATIC eaSie Core Package and
recommends to update to the latest version.


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


* SIMATIC eaSie Core Package  (6DL5424-0AX00-0AV8)
  - Affected versions:
       All versions < V22.00
  - Remediation:
       Update to V22.00 or later version


  - Download:
       https://support.industry.siemens.com/cs/ww/en/view/109809928


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


Product specific remediations or mitigations can be found in the section
"Affected Products and Solution".


Please follow the "General Security Recommendations".


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 eaSie is a digital assistant for automation and process
control technology in the Siemens automation concept, "Totally
Integrated Automation".

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-2021-44221

  The affected systems do not properly validate input that is sent to
  the underlying message passing framework. This could allow a remote
  attacker to trigger a denial of service of the affected system.

    CVSS v3.1 Base Score: 7.5
    CVSS Vector:          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:P/RL:O/RC:C
    CWE:                  CWE-20: Improper Input Validation

* Vulnerability CVE-2021-44222

  The underlying MQTT service of affected systems does not perform
  authentication in the default configuration. This could allow an
  unauthenticated remote attacker to send arbitrary messages to the
  service and thereby issue arbitrary requests in the affected system.

    CVSS v3.1 Base Score: 10.0
    CVSS Vector:          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N/E:P/RL:O/RC:C
    CWE:                  CWE-306: Missing Authentication for Critical Function




ADDITIONAL INFORMATION
======================

These vulnerabilities has been discovered internally by Siemens.

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 (2022-07-12): Publication Date
V1.1 (2022-08-09): Clarified that eaSie Core Package is affected

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.

Copyright: Siemens 2022
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