ESB-2018.2703 - [Appliance] Fuji Electric V-Server Lite: Multiple vulnerabilities 2018-09-12

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             AUSCERT External Security Bulletin Redistribution

                               ESB-2018.2703
                         Advisory (ICSA-18-254-02)
                             12 September 2018

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

Product:           Fuji Electric V-Server Lite
Publisher:         ICS-CERT
Operating System:  Network Appliance
Impact/Access:     Execute Arbitrary Code/Commands -- Remote with User Interaction
                   Denial of Service               -- Remote with User Interaction
Resolution:        Patch/Upgrade
CVE Names:         CVE-2018-10637  

Original Bulletin: 
   https://ics-cert.us-cert.gov/advisories/ICSA-18-254-02

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Advisory (ICSA-18-254-02)

Fuji Electric V-Server Lite

Original release date: September 11, 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
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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/.

1. EXECUTIVE SUMMARY

  o CVSS v3 7.8
  o ATTENTION: Exploitable remotely/low skill level to exploit
  o Vendor: Fuji Electric
  o Equipment: V-Server Lite
  o Vulnerability: Classic Buffer Overflow

2. RISK EVALUATION

Successful exploitation of this vulnerability could allow a remote attacker to
view sensitive information and disrupt the availability of the device.

3. TECHNICAL DETAILS

3.1 AFFECTED PRODUCTS

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

  o V-Server Lite 4.0.3.0 and prior.

3.2 VULNERABILITY OVERVIEW

3.2.1    BUFFER COPY WITHOUT CHECKING SIZE OF INPUT ('CLASSIC BUFFER OVERFLOW')
CWE-120

A maliciously crafted project file may cause a buffer overflow, which may allow
the attacker to execute arbitrary code.

CVE-2018-10637 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).

3.3 BACKGROUND

  o CRITICAL INFRASTRUCTURE SECTORS: Critical Manufacturing
  o COUNTRIES/AREAS DEPLOYED: Worldwide
  o COMPANY HEADQUARTERS LOCATION: Japan

3.4 RESEARCHER

Ariele Caltabiano (kimiya) working with Trend Micro's Zero Day Initiative
reported the vulnerability to NCCIC.

4. MITIGATIONS

Fuji Electric has produced firmware update v4.0.4.0, which can be obtained
here:

http://monitouch.fujielectric.com/site/support-e/download-index-01.html

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
on the ICS-CERT website in the Technical Information Paper,
ICS-TIP-12-146-01B--Targeted Cyber Intrusion Detection and Mitigation
Strategies.

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.


Contact Information

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

Email: NCCICCUSTOMERSERVICE@hq.dhs.gov
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?

The NCCIC 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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