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AUSCERT External Security Bulletin Redistribution
ESB-2017.2408
Advisory (ICSA-17-264-01): Schneider Electric InduSoft Web
Studio, InTouch Machine Edition
22 September 2017
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AusCERT Security Bulletin Summary
---------------------------------
Product: InduSoft Web Studio
InTouch Machine Edition
Publisher: ICS-CERT
Operating System: Windows
Impact/Access: Administrator Compromise -- Remote/Unauthenticated
Resolution: Patch/Upgrade
CVE Names: CVE-2017-13997
Original Bulletin:
https://ics-cert.us-cert.gov/advisories/ICSA-17-264-01
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Advisory (ICSA-17-264-01)
Schneider Electric InduSoft Web Studio, InTouch Machine Edition
Original release date: September 21, 2017
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 9.8
ATTENTION: Remotely exploitable/low skill level to exploit.
Vendor: Schneider Electric
Equipment: InduSoft Web Studio, InTouch Machine Edition
Vulnerability: Missing Authentication for Critical Function
AFFECTED PRODUCTS
Schneider Electric reports that the vulnerability affects the following
InduSoft Web Studio products:
InduSoft Web Studio v8.0 SP2 or prior, and
InTouch Machine Edition v8.0 SP2 or prior.
IMPACT
Successful exploitation of this vulnerability could allow an attacker to
remotely execute arbitrary commands with high privileges.
MITIGATION
Schneider Electric recommends users using InduSoft Web Studio v8.0 SP2 or
prior should upgrade and apply InduSoft Web Studio v8.0 SP2 Patch 1 as soon as
possible. This patch can be found on the Schneider Electric InduSoft web site
at the following location:
http://download.indusoft.com/80.2.1/IWS80.2.1.zip (link is external)
Schneider Electric recommends users using InTouch Machine Edition v8.0 SP2 or
prior should upgrade and apply InTouch Machine Edition v8.0 SP2 Patch 1 as
soon as possible. This patch can be found on Schneider Electrics Invensys web
site at the following location (registration required):
https://gcsresource.invensys.com/tracking/ConfirmDownload.aspx?id=22453 (link
is external)
For more information on this vulnerability and associated patch, please see
InduSoft Security Bulletin LFSEC00000121 on the Schneider Electric
cybersecurity web site:
http://software.schneider-electric.com/support/cyber-security-updates/ (link
is external)
NCCIC/ICS-CERT recommends that users take defensive measures to minimize the
risk of exploitation of this vulnerability. Specifically, users should:
Minimize network exposure for all control system devices and/or systems, and
ensure that they are not accessible from the Internet.
Locate control system networks and remote devices behind firewalls, and
isolate them from the business network.
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.
ICS-CERT reminds organizations to perform proper impact analysis and risk
assessment prior to deploying defensive measures.
ICS-CERT 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 ICS-CERT Technical Information Paper,
ICS-TIP-12-146-01B--Targeted Cyber Intrusion Detection and Mitigation
Strategies, that is available for download from the ICS-CERT web site.
Organizations observing any suspected malicious activity should follow their
established internal procedures and report their findings to ICS-CERT for
tracking and correlation against other incidents.
No known public exploits specifically target this vulnerability.
VULNERABILITY OVERVIEW
MISSING AUTHENTICATION FOR CRITICAL FUNCTION CWE-306
InduSoft Web Studio provides the capability for an HMI client to trigger
script execution on the server for the purposes of performing customized
calculations or actions. A remote malicious entity could bypass the server
authentication and trigger the execution of an arbitrary command. The command
is executed under high privileges and could lead to a complete compromise of
the server.
CVE-2017-13997 has been assigned to this vulnerability. A CVSS v3 base score
of 9.8 has been assigned; the CVSS vector string is
(AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H).
RESEARCHER
Aaron Portnoy, formerly of Exodus Intelligence, discovered and reported this
vulnerability to ICS-CERT.
BACKGROUND
Critical Infrastructure Sectors: Critical Manufacturing, Energy, Healthcare
and Public Health, Water and Wastewater Systems
Countries/Areas Deployed: Worldwide
Company Headquarters Location: Paris, France
Contact Information
For any questions related to this report, please contact ICS-CERT at:
Email: ics-cert@hq.dhs.gov (link sends e-mail)
Toll Free: 1-877-776-7585
International Callers: (208) 526-0900
For industrial control systems security information and incident reporting:
http://ics-cert.us-cert.gov
ICS-CERT 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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===========================================================================
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