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# SSA-721298: Missing Authentication Vulnerability in TIA Administrator (TIA Portal)

Publication Date:        2019-07-09
Last Update:             2019-07-09
Current Version:         1.0
CVSS v3.0 Base Score:    8.0

SUMMARY
=======

The latest update for TIA Administrator (TIA Portal) fixes a
vulnerability that could allow local users to execute arbitrary
application commands without proper authentication.

Siemens has released an update for the affected software and provides
workarounds and mitigations until the update can be applied.


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


* TIA Administrator 
  - Affected versions:
       All versions < V1.0 SP1 Upd1
  - Remediation:
       Update to V1.0 SP1 Upd1
  - Download:
       https://support.industry.siemens.com/cs/ww/en/view/114358


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

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

* Restrict access to port 8888/tcp to localhost (default)
  


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 WinCC (TIA Portal) is an engineering software to configure and
program SIMATIC Panels, SIMATIC Industrial PCs, and Standard PCs running
WinCC Runtime Advanced or SCADA System WinCC Runtime Professional
visualization software.



VULNERABILITY CLASSIFICATION
============================

The vulnerability classification has been performed by using the CVSS scoring
system in version 3.0 (CVSS v3.0) (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.


* Vulnerability CVE-2019-10915

  The integrated configuration web application (TIA Administrator) allows
  to execute certain application commands without proper authentication.
  
  The vulnerability could be exploited by an attacker with local access to
  the affected system. Successful exploitation requires no privileges and
  no user interaction. An attacker could use the vulnerability to
  compromise confidentiality and integrity and availability of the
  affected system.
  
  At the time of advisory publication no public exploitation of this
  security vulnerability was known.

  CVSS v3.0 Base Score: 8.0
  CVSS v3.0 Vector:     CVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:H/E:P/RL:O/RC:C


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

Siemens thanks the following parties for their efforts:

   * Joseph Bingham from Tenable 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 (2019-07-09): 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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