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AUSCERT External Security Bulletin Redistribution
ESB-2017.2776
Advisory (ICSA-17-304-02) Trihedral Engineering Limited VTScada
1 November 2017
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AusCERT Security Bulletin Summary
---------------------------------
Product: VTScada
Publisher: ICS-CERT
Operating System: Windows
Impact/Access: Execute Arbitrary Code/Commands -- Existing Account
Modify Arbitrary Files -- Existing Account
Resolution: Patch/Upgrade
CVE Names: CVE-2017-14031 CVE-2017-14029
Original Bulletin:
https://ics-cert.us-cert.gov/advisories/ICSA-17-304-02
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Advisory (ICSA-17-304-02)
Trihedral Engineering Limited VTScada
Original release date: October 31, 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 7.8
ATTENTION: Low skill level to exploit.
Vendor: Trihedral Engineering Limited
Equipment: VTScada
Vulnerabilities: Improper Access Control, Uncontrolled Search Path Element
AFFECTED PRODUCTS
Trihedral Engineering Limited reports that the vulnerability affects the
following versions of the VTScada HMI and SCADA software:
- -VTScada 11.3.03 and prior.
IMPACT
Successful exploitation of these vulnerabilities may allow execution of
arbitrary code.
MITIGATION
Trihedral Engineering Limited recommends that users of an affected version
update to the latest version, 11.3.05. The update can be found at the
following location:
ftp://ftp.trihedral.com/VTS/VTScada 11.3 Versions/
Help file notes for upgrading VTScada/VTS can be found at:
https://www.trihedral.com/help/Content/Op_Welcome/Wel_UpgradeNotes.htm (link
is external)
NCCIC/ICS-CERT recommends that users take defensive measures to minimize the
risk of exploitation of these vulnerabilities. Specifically, users should take
the following measures to protect themselves from social engineering attacks:
- -Do not click web links or open unsolicited attachments in email messages.
- -Refer to Recognizing and Avoiding Email Scams for more information on
avoiding email scams.
- -Refer to Avoiding Social Engineering and Phishing Attacks for more
information on social engineering attacks.
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 ICSCERT 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 these vulnerabilities. These
vulnerabilities are not remotely exploitable.
VULNERABILITY OVERVIEW
IMPROPER ACCESS CONTROL CWE-284
A local, non-administrator user has privileges to read and write to the file
system of the target machine.
CVE-2017-14031 has been assigned to this vulnerability. A CVSS v3 base score
of 7.8 has been calculated; the CVSS vector string is
(AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H).
UNCONTROLLED SEARCH PATH ELEMENT CWE-427
The program will execute specially crafted malicious dll files placed on the
target machine.
CVE-2017-14029 has been assigned to this vulnerability. A CVSS v3 base score
of 7.8 has been calculated; the CVSS vector string is
(AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H).
RESEARCHER
Karn Ganeshen and Mark Cross independently discovered these vulnerabilities
and reported them to ICS-CERT.
BACKGROUND
Critical Infrastructure Sectors: Chemical, Communications, Critical
Manufacturing, Energy, Food and Agriculture, Transportation Systems, Water and
Wastewater Systems
Countries/Areas Deployed: North America, Europe
Company Headquarters Location: Canada
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===========================================================================
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