ICS Advisory (ICSA-17-262-01)

PHOENIX CONTACT mGuard Device Manager

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CVSS v3 9.0

ATTENTION: Remotely exploitable/low skill level to exploit.

Vendor: PHOENIX CONTACT

Equipment: mGuard Device Manager

Vulnerabilities: Improper Access Control vulnerabilities for Oracle Java SE

AFFECTED PRODUCTS

The following versions of mGuard Device Manager, a device management software for mGuard devices, are affected:

  • mGuard Device Manager 1.8.0 and older.

IMPACT

Successful exploitation of these vulnerabilities could allow unauthorized remote access, modification of data, and may allow remote and local users to gain elevated privileges.

MITIGATION

PHOENIX CONTACT recommends that all users of the affected product on Windows should update to at least Version 1.8.0.1. The update can be performed by simply executing the installer for Version 1.8.0.1 on a Windows system where the product is installed in Version 1.8.0. The installer is available for download on the product page, in section “Software” on the Downloads tab at the following location:

https://www.phoenixcontact.com/online/portal/us?uri=pxc-oc-itemdetail:pid=2981974

For more information please refer to the document “How to upgrade mGuard device manager” downloaded with the installer.

PHOENIX CONTACT recommends that all users of the affected product on Linux should update Java to the latest version. When using the packet source delivered by PHOENIX CONTACT on Ubuntu, this is simply done by using the software updater of the operating system.

NCCIC/ICS-CERT recommends that users take defensive measures to minimize the risk of exploitation of these vulnerabilities. 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.

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.

VULNERABILITY OVERVIEW

Improper Access Control vulnerabilities have been reported for Oracle Java SE, which is provided with PHOENIX CONTACT FL MGUARD DM. According to Oracle, the supported Java versions affected by these vulnerabilities are Java SE: 8u131, 7u141 and 6u151, Java SE Embedded: 8u131, and JRockit: R28.3.14. PHOENIX CONTACT provided FL MGUARD DM 1.8.0 for Windows with Java SE 8u131.

CVE-2017-10102, CVE-2017-10116, CVE-2017-10078, CVE-2017-10115, CVE-2017-10118, CVE-2017-10176, CVE-2017-10198, CVE-2017-10135, CVE-2017-10053, CVE-2017-10108 have been assigned to these vulnerabilities. A CVSS v3 base score of 9.0 has been assigned; the CVSS vector string is (AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H).

For more information on these vulnerabilities, please refer to sources cited at these locations:

Published advisory of CERT@VDE:

https://cert.vde.com/de-de/advisories/vde-2017-002

Oracle Critical Patch Update Advisory report:

http://www.oracle.com/technetwork/security-advisory/cpujul2017-3236622.html

RESEARCHER

PHOENIX CONTACT reported these vulnerabilities to CERT@VDE. CERT@VDE coordinated these vulnerabilities with ICS-CERT.

BACKGROUND

Critical Infrastructure Sectors: Communications, Critical Manufacturing, Information Technology

Countries/Areas Deployed: Worldwide

Company Headquarters Location: Germany


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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