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AUSCERT External Security Bulletin Redistribution
ESB-2018.1445
MatrikonOPC Explorer patches file access vulnerability
11 May 2018
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AusCERT Security Bulletin Summary
---------------------------------
Product: MatrikonOPC Explorer
Publisher: ICS-CERT
Operating System: Windows
Impact/Access: Read-only Data Access -- Existing Account
Resolution: Patch/Upgrade
CVE Names: CVE-2018-8714
Original Bulletin:
https://ics-cert.us-cert.gov/advisories/ICSA-18-130-01
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Advisory (ICSA-18-130-01)
MatrikonOPC Explorer
Original release date: May 10, 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
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/.
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1. EXECUTIVE SUMMARY
* CVSS v3 6.7
* ATTENTION: Low skill level to exploit
* Vendor: MatrikonOPC
* Equipment: MatrikonOPC Explorer
* Vulnerability: Files or Directories Accessible to External Parties
2. RISK EVALUATION
If the attacker has local access to the system, an attacker could exploit this
vulnerability. This could allow an attacker to transfer unauthorized files from
the host system, which could result in unauthorized information disclosure.
3. TECHNICAL DETAILS
3.1 AFFECTED PRODUCTS
According to MatrikonOPC, the following product is affected:
* MatrikonOPC Explorer, Versions 5.0 and prior.
3.2 VULNERABILITY OVERVIEW
3.2.1 FILES OR DIRECTORIES ACCESSIBLE TO EXTERNAL PARTIES CWE-552
Successful exploitation of this vulnerability could allow an attacker to
transfer unauthorized files from the host system. The attacker must have local
access to be able to exploit this vulnerability.
CVE-2018-8714 has been assigned to this vulnerability. A CVSS v3 base score of
6.7 has been calculated; the CVSS vector string is (AV:L/AC:L/PR:L/UI:R/S:C/C:H
/I:N/A:L).
3.3 BACKGROUND
* Critical Infrastructure Sectors: Chemical and Energy
* Countries/Areas Deployed: Worldwide
* Company Headquarters Location: United States
3.4 RESEARCHER
Ilya Kapov of Positive Technologies reported this vulnerability to MatrikonOPC.
4. MITIGATIONS
MatrikonOPC has made fixes available to resolve this vulnerability through a
patch:
* MatrikonOPC Explorer Versions 5.0 and prior: Update to V5.1.0.0
MatrikonOPC recommends that the affected users follow the instructions below to
download and install the patch:
1. Navigate to the MatrikonOPC website: https://www.matrikonopc.com/downloads/
176/software/index.aspx
2. Login with your credentials
3. Download the patch via this link
4. Run the patch installer, which will make all necessary changes.
MatrikonOPC has published a security notification, which can be located here:
https://www.opcsupport.com/s/article/
SECURITY-NOTIFICATION-OPC-Explorer-SN-2017-04-27-01
NCCIC recommends 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.
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. This
vulnerability is not exploitable remotely.
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?
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