ICS Advisory (ICSA-20-063-02)

PHOENIX CONTACT Emalytics Controller ILC

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1. EXECUTIVE SUMMARY

  • CVSS v3 9.4
  • ATTENTION: Exploitable remotely/low skill level to exploit
  • Vendor: Phoenix Contact
  • Equipment: Emalytics Controller ILC 2050 BI(L)
  • Vulnerability: Incorrect Permission Assignment for Critical Resource

2. RISK EVALUATION

Successful exploitation of this vulnerability could allow an attacker to change the device configuration and start or stop services.

3. TECHNICAL DETAILS

3.1 AFFECTED PRODUCTS

The following versions of Emalytics Controller are affected:

  • ILC 2050 BI (Article number 2403160): all versions prior to 1.2.3
  • ILC 2050 BI-L (Article number 2404671): all versions prior to 1.2.3

3.2 VULNERABILITY OVERVIEW

3.2.1    INCORRECT PERMISSION ASSIGNMENT FOR CRITICAL RESOURCE CWE-732

This device lacks proper permissions for read and write access to the configuration and start/stop services. 

CVE-2020-8768 has been assigned to this vulnerability. A CVSS v3 base score of 9.4 has been calculated; the CVSS vector string is (AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:H).

3.3 BACKGROUND

  • CRITICAL INFRASTRUCTURE SECTORS: Commercial Facilities, Energy
  • COUNTRIES/AREAS DEPLOYED: Worldwide
  • COMPANY HEADQUARTERS LOCATION: Germany

3.4 RESEARCHER

4. MITIGATIONS

Phoenix Contact strongly recommends affected users update to engineering software Emalytics v1.2.3 or higher and recommission the controllers. The updated version is available on the vendor's product page.

Please see advisory number VDE-2020-001 from CERT@VDE for more information.

CISA 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.

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.


Contact Information

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

Email: CISAservicedesk@cisa.dhs.gov
Toll Free: 1-888-282-0870

For industrial control systems cybersecurity information:  https://us-cert.cisa.gov/ics 
or incident reporting:  https://us-cert.cisa.gov/report

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