Operating System:

[Win]

Published:

12 July 2019

Protect yourself against future threats.

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             AUSCERT External Security Bulletin Redistribution

                               ESB-2019.2584
             Advisory (icsa-19-192-04) Siemens SIMATIC RF6XXR
                               12 July 2019

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

        AusCERT Security Bulletin Summary
        ---------------------------------

Product:           Siemens SIMATIC RF6XXR
Publisher:         ICS-CERT
Operating System:  Windows
Impact/Access:     Access Privileged Data -- Remote/Unauthenticated
Resolution:        Patch/Upgrade
CVE Names:         CVE-2016-6329 CVE-2013-0169 CVE-2011-3389

Reference:         ASB-2016.0098
                   ASB-2016.0054.2
                   ESB-2019.2561
                   ESB-2019.0097

Original Bulletin: 
   https://www.us-cert.gov/ics/advisories/icsa-19-192-04

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ICS Advisory (ICSA-19-192-04)

Siemens SIMATIC RF6XXR

Original release date: July 11, 2019

Legal Notice

All information products included in http://ics-cert.us-cert.gov are
provided"as is" for informational purposes only. The Department of Homeland
Security (DHS) does not provide any warranties of any kind regarding any
information contained within. DHS does not endorse any commercial product or
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product is governed by the Traffic Light Protocol (TLP) marking in the header.
For more information about TLP, see http://www.us-cert.gov/tlp/ .



1. EXECUTIVE SUMMARY

  o CVSS v3 5.9
  o ATTENTION : Exploitable remotely/public exploits are available
  o Vendor : Siemens
  o Equipment : SIMATIC RF6XXR
  o Vulnerabilities : Improper Input Validation, Cryptographic Issues

2. RISK EVALUATION

Successful exploitation of these vulnerabilities could allow access to
sensitive information.

3. TECHNICAL DETAILS

3.1 AFFECTED PRODUCTS

Siemens reports that the vulnerabilities affect all versions prior to 3.2.1 of
the following SIMATIC RF6XXR UHF RFID products:

  o RF615R
  o RF68XR

3.2 VULNERABILITY OVERVIEW

3.2.1 IMPROPER INPUT VALIDATION CWE-20
The SSL protocol encrypts data by using CBC mode with chained initialization
vectors, which may allow a man-in-the-middle attack to obtain plaintext HTTP
headers.
CVE-2011-3389 has been assigned to this vulnerability. A CVSS v3 base score of
5.9 has been calculated; the CVSS vector string is ( AV:N/AC:H/PR:N/UI:N/S:U/
C:H/I:N/A:N ).

3.2.2 CRYPTOGRAPIC ISSUES CWE-310
Long-duration TLS sessions used with a 64-bit block cipher may allow remote
attackers to obtain cleartext data.
CVE-2016-6329 has been assigned to this vulnerability. A CVSS v3 base score of
5.9 has been calculated; the CVSS vector string is ( AV:N/AC:H/PR:N/UI:N/S:U/
C:H/I:N/A:N ).

3.2.3 CRYPTOGRAPIC ISSUES CWE-310
Outdated versions of TLS and DTLS allow statistical analysis of timing data for
crafted packets, which may allow remote attackers to conduct distinguishing and
plaintext-recovery attacks.
CVE-2013-0169 has been assigned to this vulnerability. A CVSS v3 base score of
5.9 has been calculated; the CVSS vector string is ( AV:N/AC:H/PR:N/UI:N/S:U/
C:H/I:N/A:N ).

3.3 BACKGROUND

  o CRITICAL INFRASTRUCTURE SECTORS : Critical Manufacturing, Food and
    Agriculture, Transportation Systems
  o COUNTRIES/AREAS DEPLOYED : Worldwide
  o COMPANY HEADQUARTERS LOCATION : Germany

3.4 RESEARCHER

Wendy Parrington from United Utilities reported these vulnerabilities to
Siemens.

4. MITIGATIONS

Siemens recommends users upgrade to Version 3.2.1 or newer for both affected
products.

Siemens also recommends users restrict network access to the device.

For more information on these vulnerabilities and associated software updates,
please see Siemens' security advisory SSA-556833 at: https://www.siemens.com/
cert/advisories.

NCCIC recommends users take defensive measures to minimize the risk of
exploitation of this vulnerability. Specifically, users should:

  o Minimize network exposure for all control system devices and/or systems,
    and ensure that they are not accessible from the Internet .
  o Locate control system networks and remote devices behind firewalls, and
    isolate them from the business network.
  o When remote access is required, use secure methods, such as Virtual Private
    Networks (VPNs), recognizing that VPNs may have vulnerabilities and should
    be updated to the most current version available. Also recognize that VPN
    is only as secure as the connected devices.

NCCIC reminds organizations to perform proper impact analysis and risk
assessment prior to deploying defensive measures.

NCCIC also provides a section for control systems security recommended
practices on the ICS webpage on us-cert.gov . Several recommended practices are
available for reading and download, including Improving Industrial Control
Systems Cybersecurity with Defense-in-Depth Strategies .

Additional mitigation guidance and recommended practices are publicly available
in the Technical Information Paper, ICS-TIP-12-146-01B--Targeted Cyber
Intrusion Detection and Mitigation Strategies .

Organizations observing any suspected malicious activity should follow their
established internal procedures and report their findings to NCCIC for tracking
and correlation against other incidents.

High skill level is needed to exploit.

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