ESB-2017.2776 - [Win] VTScada: Multiple vulnerabilities 2017-11-01

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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

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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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