ESB-2018.0485 - [Appliance] Schneider Electric StruxureOn Gateway: Execute arbitrary code/commands - Existing account 2018-02-19

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             AUSCERT External Security Bulletin Redistribution

                               ESB-2018.0485
           Schneider Electric StruxureOn Gateway Security Update
                             19 February 2018

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

Product:           Schneider Electric StruxureOn Gateway
Publisher:         ICS-CERT
Operating System:  Network Appliance
Impact/Access:     Execute Arbitrary Code/Commands -- Existing Account
Resolution:        Patch/Upgrade
CVE Names:         CVE-2017-9970  

Original Bulletin: 
   https://ics-cert.us-cert.gov/advisories/ICSA-18-046-04

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Advisory (ICSA-18-046-04)

Schneider Electric StruxureOn Gateway

Original release date: February 15, 2018

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/.

CVSS v3 7.2

ATTENTION: Remotely exploitable/low skill level to exploit.

Vendor: Schneider Electric

Equipment: StruxureOn Gateway

Vulnerability: Unrestricted Upload of File with Dangerous Type

AFFECTED PRODUCTS

Schneider Electric reports that the vulnerability affects the following
versions of StruxureOn Gateway, a software management platform:

  o StruxureOn Gateway, all versions prior to 1.2

IMPACT

Successful exploitation of this vulnerability could allow a remote attacker to
upload a malicious file to any directory on the device, which could lead to
remote code execution.

MITIGATION

Schneider Electric has released a new version of the software located at:

https://struxureon.com/download-and-set-up-struxureon-gateway/ 
(link is external)

For more information on these vulnerabilities and associated patch, please see
Schneider Electric's security notification SEVD-2018-039-01 on their website:

https://www.schneider-electric.com/en/download/document/SEVD-2018-039-01/ 
(link is external)

Schneider Electric reports that, in addition to upgrading to version 1.2, users
should ensure they change the default passwords as this vulnerability requires
authenticated access.

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-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
in the NCCIC Technical Information Paper, ICS-TIP-12-146-01B--Targeted Cyber
Intrusion Detection and Mitigation Strategies, that is available for download
from the ICS-CERT website.

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.

VULNERABILITY OVERVIEW

UNRESTRICTED UPLOAD OF FILE WITH DANGEROUS TYPE CWE-434

Uploading a zip file with modified metadata may allow remote code execution.

CVE-2017-9970 has been assigned to this vulnerability. A CVSS v3 base score of
7.2 has been calculated; the CVSS vector string is (AV:N/AC:L/PR:H/UI:N/S:U/C:H
/I:H/A:H).

RESEARCHER

Schneider Electric reported this vulnerability to NCCIC.

BACKGROUND

Critical Infrastructure Sectors: Critical Manufacturing, Energy

Countries/Areas Deployed: Worldwide

Company Headquarters Location: France


Contact Information

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

Email: NCCICCUSTOMERSERVICE@hq.dhs.gov (link sends e-mail)
Toll Free: 1-888-282-0870

For industrial control systems cybersecurity information:  
http://ics-cert.us-cert.gov 
or incident reporting:  https://ics-cert.us-cert.gov/Report-Incident?

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