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AUSCERT External Security Bulletin Redistribution
ESB-2019.4210
Advisory (icsa-19-311-02) Fuji Electric V-Server
8 November 2019
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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 with User Interaction
Resolution: Patch/Upgrade
CVE Names: CVE-2019-18240
Original Bulletin:
https://www.us-cert.gov/ics/advisories/icsa-19-311-02
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ICS Advisory (ICSA-19-311-02)
Fuji Electric V-Server
Original release date: November 07, 2019
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/ .
1. EXECUTIVE SUMMARY
o CVSS v3 7.8
o ATTENTION: Low skill level to exploit
o Vendor: Fuji Electric
o Equipment: V-Server
o Vulnerability: Heap-based Buffer Overflow
2. RISK EVALUATION
Successful exploitation of this vulnerability could crash the device being
accessed; several heap-based buffer overflows have been identified.
3. TECHNICAL DETAILS
3.1 AFFECTED PRODUCTS
The following versions of V-Server, a data collection and management service,
are affected:
o V-Server 4.0.6 and prior
3.2 VULNERABILITY OVERVIEW
3.2.1 HEAP-BASED BUFFER OVERFLOW CWE-122
Several heap-based buffer overflows have been identified, which may allow an
attacker to remotely execute arbitrary code.
CVE-2019-18240 has been assigned to this vulnerability. A CVSS v3 base score of
7.8 has been assigned; 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
kimiya of 9SG, working with Trend Micro's Zero Day Initiative, reported this
vulnerability to CISA.
4. MITIGATIONS
Fuji Electric has released Version 4.0.7.0 to mitigate the reported
vulnerability.
CISA 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.
CISA reminds organizations to perform proper impact analysis and risk
assessment prior to deploying defensive measures.
CISA also provides a section for control systems security recommended practices
on the ICS webpage on us-cert.gov . 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 webpage on us-cert.gov 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 CISA for tracking
and correlation against other incidents.
No known public exploits specifically target this vulnerability.
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