ICS Advisory (ICSA-20-049-01)

Honeywell INNCOM INNControl 3

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1. EXECUTIVE SUMMARY

  • CVSS v3 6.6
  • ATTENTION: Low skill level to exploit
  • Vendor: Honeywell
  • Equipment: INNCOM INNControl 3
  • Vulnerability: Improper Privilege Management

2. RISK EVALUATION

Successful exploitation of this vulnerability could allow an attacker to escalate user privileges within the INNControl application.

3. TECHNICAL DETAILS

3.1 AFFECTED PRODUCTS

The following versions of INNCOM INNControl 3, an energy management platform, are affected:

  • INNControl 3, Versions 3.21 and prior

3.2 VULNERABILITY OVERVIEW

3.2.1    IMPROPER PRIVILEGE MANAGEMENT CWE-269

The affected product allows workstation users to escalate application user privileges through the modification of local configuration files.

CVE-2020-6968 has been assigned to this vulnerability. A CVSS v3 base score of 6.6 has been calculated; the CVSS vector string is (AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:L).

3.3 BACKGROUND

  • CRITICAL INFRASTRUCTURE SECTORS: Commercial Facilities, Critical Manufacturing, Energy, Healthcare and Public Health
  • COUNTRIES/AREAS DEPLOYED: Worldwide
  • COMPANY HEADQUARTERS LOCATION: United States

3.4 RESEARCHER

Honeywell reported this vulnerability to CISA.

4. MITIGATIONS

Honeywell encourages users to contact an INNCOM sales representative or authorized systems integrator to obtain information on upgrading their system(s) to the latest version. Honeywell also offers online INNCOM support. Additional information about the vulnerability can be found in the Honeywell Security Notification.

Honeywell recommends that, subject to each user’s individual assessment of the potential impact(s) of the vulnerabilities and/or recommendations on their specific operational building control network environment(s), users with potentially affected products are recommended to take the following steps to mitigate the effects of potential vulnerabilities:

  • Update the software of potentially impacted systems as per the Security Notification.
  • Disable unnecessary accounts and services.
  • Restrict system access to authorized personnel only and follow a least privilege approach.
  • Apply defense-in-depth strategies.

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. This vulnerability is not exploitable remotely.


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://www.us-cert.gov/ics 
or incident reporting:  https://www.us-cert.gov/report

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