Operating System:

Published:

28 June 2019

Protect yourself against future threats.

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             AUSCERT External Security Bulletin Redistribution

                               ESB-2019.2349
                   Advisory (icsa-19-178-04) SICK MSC800
                               28 June 2019

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

Product:           SICK MSC800
Publisher:         ICS CERT
Operating System:  Network Appliance
Impact/Access:     Increased Privileges -- Remote/Unauthenticated
Resolution:        Patch/Upgrade
CVE Names:         CVE-2019-10979  

Original Bulletin: 
   https://www.us-cert.gov/ics/advisories/icsa-19-178-04

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ICS Advisory (ICSA-19-178-04)

SICK MSC800

Original release date: June 27, 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
service, referenced in this product or otherwise. Further dissemination of this
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 9.8
  o ATTENTION: Exploitable remotely/low skill level to exploit
  o Vendor: SICK
  o Equipment: MSC800
  o Vulnerability: Use of Hard-coded Credentials

2. RISK EVALUATION

Successful exploitation of this vulnerability could allow a low-skilled remote
attacker to reconfigure settings and/or disrupt the functionality of the
device.

3. TECHNICAL DETAILS

3.1 AFFECTED PRODUCTS

The following versions of MSC800, a programmable logic controller, are
affected:

  o MSC800 all versions prior to Version 4.0

3.2 VULNERABILITY OVERVIEW

3.2.1 USE OF HARD-CODED CREDENTIALS CWE-798

The affected firmware versions contain a hard-coded customer account password.

CVE-2019-10979 has been assigned to this vulnerability. A CVSS v3 base score of
9.8 has been calculated; the CVSS vector string is ( AV:N/AC:L/PR:N/UI:N/S:U/
C:H/I:H/A:H ).

3.3 BACKGROUND

  o CRITICAL INFRASTRUCTURE SECTORS: Critical Manufacturing
  o COUNTRIES/AREAS DEPLOYED: Worldwide
  o COMPANY HEADQUARTERS LOCATION: Germany

3.4 RESEARCHER

Tri Quach of Amazon's Customer Fulfillment Technology Security (CFTS) group
reported this vulnerability to NCCIC.

4. MITIGATIONS

SICK recommends affected users upgrade to the latest firmware version (v4.0).

The patch and installation procedure for the firmware update is available from
the responsible SICK representative. Until the firmware update is installed,
general security practices should be utilized.

In case the referenced patches cannot be applied, the following general
security practices could mitigate the associated risk.

For more information SICK has released a security notification that can be
found at: https://www.sick.com/de/en/service-and-support/
the-sick-product-security-incident-response-team-sick-psirt/w/psirt/#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 Blocking/Monitoring Ports TCP/2111 or TCP/2112
  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-CERT web page. 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
on the ICS-CERT website 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.

No known public exploits specifically target this vulnerability.

For any questions related to this report, please contact the NCCIC at:

Email: NCCICCUSTOMERSERVICE@hq.dhs.gov
Toll Free: 1-888-282-0870

The NCCIC continuously strives to improve its products and services. You can
help by choosing one of the links below to provide feedback about this product.

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