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# SSA-816980: Multiple Web Vulnerabilities in SIMATIC MV400 Family

Publication Date:        2019-06-11
Last Update:             2021-03-09
Current Version:         1.1
CVSS v3.1 Base Score:    7.1

SUMMARY
=======

The SIMATIC MV400 product family is affected by two web vulnerabilities.
The vulnerabilities could allow an authenticated user to escalate
privileges, or might expose sensitive information to an attacker that is
able to eavesdrop the communication.

Siemens has released an update for the SIMATIC MV400 family and
recommends to update to the latest version.


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


* SIMATIC MV400 family 
  - Affected versions:
       All Versions < V7.0.6
  - Remediation:
       Update to V7.0.6
  - Download:
       https://support.industry.siemens.com/cs/ww/en/view/109793481/


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

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

* By setting the DISA bit, changes to the project by logged-in users can
be prevented. Please refer to the Operating Instructions for more
details: https://support.industry.siemens.com/cs/ww/en/view/84553392
  
* Protect network access to affected devices.
  


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

The stationary optical readers of the SIMATIC MV400 family are used to
reliably capture printed, lasered, drilled, punched and dotpeen codes on
a variety of different surfaces.

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-2019-10925

  An authenticated attacker could escalate privileges by sending specially
  crafted requests to the integrated webserver.
  
  The security vulnerability can be exploited by an attacker with network
  access to the device. Valid user credentials, but no user interaction
  are required. Successful exploitation compromises integrity and
  availability of the device.
  
  At the time of advisory publication no public exploitation of this
  security vulnerability was known.

  CVSS v3.1 Base Score: 7.1
  CVSS Vector:          CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:L/E:P/RL:O/RC:C
  CWE:                  CWE-284: Improper Access Control

* Vulnerability CVE-2019-10926

  Communication with the device is not encrypted. Data transmitted between
  the device and the user can be obtained by an attacker in a privileged
  network position.
  
  The security vulnerability can be exploited by an attacker in a
  privileged network position which allows eavesdropping the communication
  between the affected device and the user. The user must invoke a
  session. Successful exploitation of the vulnerability compromises
  confidentiality of the data transmitted.

  CVSS v3.1 Base Score: 5.3
  CVSS Vector:          CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:N/A:N/E:P/RL:O/RC:C
  CWE:                  CWE-319: Cleartext Transmission of Sensitive Information




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 (2019-06-11): Publication Date
V1.1 (2021-03-09): Added update information for MV400

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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