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

# SSA-938930: Cross-Site Scripting Vulnerability in Spectrum Power™ 5

Publication Date:        2020-03-10
Last Update:             2020-03-10
Current Version:         1.0
CVSS v3.1 Base Score:    6.1

SUMMARY
=======

A Cross-Site Scripting (XSS) vulnerability was found in the Engineering
User Interface of Spectrum Power™ 5.

A software update is available to address the issue and Siemens
recommends installing the patch.


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


* Spectrum Power™ 5 
  - Affected versions:
       All versions < v5.50 HF02
  - Remediation:
       Please contact Siemens Energy Customer Support Center at:
       support.energy@siemens.com or your local Siemens representative.


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

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

* Do not open unknown links while working on Spectrum Power™ 5.
  


GENERAL SECURITY RECOMMENDATIONS
================================

Operators of critical power systems (e.g. TSOs or DSOs) worldwide are
usually required by regulations to build resilience into the power grids
by applying multi-level redundant secondary protection schemes. It is
therefore recommended that the operators check whether appropriate
resilient protection measures are in place. The risk of cyber incidents
impacting the grid's reliability can thus be minimized by virtue of the
grid design.

Siemens strongly recommends applying the provided security updates using
the corresponding tooling and documented procedures made available with
the product. If supported by the product, an automated means to apply
the security updates across multiple product instances may be used.
Siemens strongly recommends prior validation of any security update
before being applied, and supervision by trained staff of the update
process in the target environment.

As a general security measure Siemens strongly recommends to protect
network access with appropriate mechanisms (e.g. firewalls,
segmentation, VPN). It is advised to configure the environment according
to our operational guidelines in order to run the devices in a protected
IT environment.

Recommended security guidelines to Digital Grid Products can be found
at:

https://www.siemens.com/gridsecurity

PRODUCT DESCRIPTION
===================

Spectrum Power™ 5 is used for the automation of power supply networks in
industry and for gas, water, district heating, and power supply grids
operated by public utilities.

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-2020-7579

  The web server could allow Cross-Site Scripting (XSS) attacks if
  unsuspecting users are tricked into accessing a malicious link.
  
  User interaction is required for a successful exploitation.
  
  If deployed according to recommended system configuration, Siemens
  considers the environmental vector as CR:L/IR:M/AR:H/MAV:A (4.1).

  CVSS v3.1 Base Score: 6.1
  CVSS Vector:          CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N/E:P/RL:O/RC:C
  CWE:                  CWE-80: Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic
XSS)


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

Siemens thanks the following parties for their efforts:

   * Kudelski Security Pentesting Team 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 (2020-03-10): 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.
-----BEGIN PGP SIGNATURE-----
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=MwhJ
-----END PGP SIGNATURE-----