ESB-2017.1731 - [Win] Fuji Electric V-Server: Execute arbitrary code/commands - Remote/unauthenticated 2017-07-13

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             AUSCERT External Security Bulletin Redistribution

                               ESB-2017.1731
                          Fuji Electric V-Server
                               13 July 2017

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

Product:           Fuji Electric V-Server
Publisher:         ICS-CERT
Operating System:  Windows
Impact/Access:     Execute Arbitrary Code/Commands -- Remote/Unauthenticated
                   Denial of Service               -- Remote/Unauthenticated
Resolution:        Patch/Upgrade
CVE Names:         CVE-2017-9639  

Original Bulletin: 
   https://ics-cert.us-cert.gov/advisories/ICSA-17-192-02

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Advisory (ICSA-17-192-02)

Fuji Electric V-Server

Original release date: July 11, 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 7.3

ATTENTION: Remotely exploitable

Vendor: Fuji Electric

Equipment: V-Server

Vulnerability: Improper Restriction of Operations within the Bounds of a 
Memory Buffer

AFFECTED PRODUCTS

The following versions of V-Server, a data collection and management service,
are affected:

V-Server Version 3.3.22.0 and prior.

IMPACT

Successful exploitation of this memory corruption vulnerability could allow an
attacker to remotely execute arbitrary code.

MITIGATION

Fuji Electric has produced a patch that can be found at:

http://proself.hakko-elec.co.jp/public/EKzkQAiIvMzAVF0Bg-FcEz9DkGitzZP0H8fRbQ64QICh
(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.

No known public exploits specifically target this vulnerability. High skill 
level is needed to exploit.

VULNERABILITY OVERVIEW

IMPROPER RESTRICTION OF OPERATIONS WITHIN THE BOUNDS OF A MEMORY BUFFER 
CWE-119

A memory corruption vulnerability has been identified, which may allow remote
code execution.

CVE-2017-9639 has been assigned to this vulnerability. A CVSS v3 base score of
7.3 has been assigned; the CVSS vector string is 
(AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L).

RESEARCHER

Ariele Caltabiano working with Trend Micro's Zero Day Initiative identified 
this vulnerability.

BACKGROUND

Critical Infrastructure Sector: Critical Manufacturing

Countries/Areas Deployed: Worldwide

Company Headquarters Location: Japan

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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