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

# SSA-712518: Information Disclosure Vulnerability (Kr00k) in Industrial Wi-Fi
Products

Publication Date:        2020-08-11
Last Update:             2020-12-08
Current Version:         1.1
CVSS v3.1 Base Score:    3.1

SUMMARY
=======

An information disclosure vulnerability (CVE-2019-15126, also known as
Kr00k) could allow an attacker to read a discrete set of traffic over
the air after a Wi-Fi device state change.

Siemens is preparing updates and recommends specific countermeasures for
products where updates are not, or not yet available.


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


* SIMATIC RF350M 
  - Affected versions:
       All versions
  - Remediation:
        See recommendations from section Workarounds and Mitigations

* SIMATIC RF650M 
  - Affected versions:
       All versions
  - Remediation:
        See recommendations from section Workarounds and Mitigations

* SIMOTICS CONNECT 400 
  - Affected versions:
       All versions < V0.4.0.22
  - Remediation:
       Update to V0.4.0.22
  - Download:
       https://support.industry.siemens.com/cs/ww/en/view/109778383


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

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

* SIMATIC RF350M and RF650M: Disable Wi-Fi if possible
  
* SIMOTICS CONNECT 400: No specific countermeasures needed as the data is
protected via TLS on application layer
  


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 RFx50M are handheld RFID reader/writer terminals with
application software for customizing RFID tags.

SIMOTICS CONNECT 400 is a connector and sensor box, mounted on
low-voltage motors to provide analytics data for the MindSphere
application SIDRIVE IQ Fleet.

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-2019-15126

  An issue was discovered on Broadcom Wi-Fi client devices. Specifically
  timed and handcrafted traffic can cause internal errors (related to
  state transitions) in a WLAN device that lead to improper layer 2 Wi-Fi
  encryption with a consequent possibility of information disclosure over
  the air for a discrete set of traffic.

  CVSS v3.1 Base Score: 3.1
  CVSS Vector:          CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N/E:P/RL:O/RC:C
  CWE:                  CWE-367: Time-of-check Time-of-use (TOCTOU) Race Condition




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 (2020-08-11): Publication Date
V1.1 (2020-12-08): Added solution for SIMOTICS CONNECT 400

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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=IrhD
-----END PGP SIGNATURE-----