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# SSA-844562: Multiple Vulnerabilities in Licensing Software for WinCC OA

Publication Date:        2019-02-25
Last Update:             2019-04-09
Current Version:         1.1
CVSS v3.0 Base Score:    10.0

SUMMARY
=======

Multiple vulnerabilities have been identified in the WibuKey Digital
Rights Management (DRM) solution, which affect WinCC OA. Siemens
recommends users to apply the updates to WibuKey Digital Rights
Management (DRM) provided by WIBU SYSTEMS AG.


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


* SIMATIC WinCC OA 3.14 
  - Affected versions:
       All versions < P025
  - Remediation:
       Update to V3.14-P025 or apply WibuKey Digital Rights Management (DRM)
       version 6.50 or higher from WIBU SYSTEMS AG
  - Download:
       https://www.winccoa.com/downloads/category/patches-315-16.html

* SIMATIC WinCC OA 3.15 
  - Affected versions:
       All versions < P018
  - Remediation:
       Update to V3.15-P018 or apply WibuKey Digital Rights Management (DRM)
       version 6.50 or higher from WIBU SYSTEMS AG
  - Download:
       https://www.winccoa.com/downloads/category/patches-315-17.html

* SIMATIC WinCC OA 3.16 
  - Affected versions:
       All versions < P007
  - Remediation:
       Update to V3.16-P007 or apply WibuKey Digital Rights Management (DRM)
       version 6.50 or higher from WIBU SYSTEMS AG
  - Download:
       https://www.winccoa.com/downloads/category/patches-316-1.html


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

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

* CVE-2018-3991 can be mitigated by blocking port 22347/tcp e.g. on an
external firewall.
  


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), 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 client-server HMI (human machine interface) system SIMATIC WinCC
Open Architecture (OA) is part of the SIMATIC HMI family. It is designed
for use in applications requiring a high degree of customer-specific
adaptability, large or complex applications and projects that impose
specific system requirements or functions.



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-2018-3989

  A specially crafted IRP (I/O request packet) can cause the driver to
  return uninitialized memory, resulting in kernel memory disclosure.

  CVSS v3.0 Base Score: 4.3
  CVSS v3.0 Vector:     CVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:C/C:L/I:N/A:N/E:P/RL:O/RC:C

* Vulnerability CVE-2018-3990

  A specially crafted IRP (I/O request packet) can cause a buffer
  overflow, resulting in kernel memory corruption and, potentially,
  privilege escalation.

  CVSS v3.0 Base Score: 9.3
  CVSS v3.0 Vector:     CVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H/E:P/RL:O/RC:C

* Vulnerability CVE-2018-3991

  A specially crafted TCP packet sent to port 22347/tcp can cause a heap
  overflow, potentially leading to remote code execution.

  CVSS v3.0 Base Score: 10.0
  CVSS v3.0 Vector:     CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H/E:P/RL:O/RC:C




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 (2019-02-25): Publication Date
V1.1 (2019-04-09): Added solutions

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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