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             AUSCERT External Security Bulletin Redistribution

                               ESB-2021.2984
Advisory (icsa-21-245-01) Johnson Controls Sensormatic Electronics Illustra
                             3 September 2021

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        AusCERT Security Bulletin Summary
        ---------------------------------

Product:           Johnson Controls Sensormatic Electronics Illustra
Publisher:         ICS-CERT
Operating System:  Linux variants
Impact/Access:     Root Compromise -- Existing Account
Resolution:        Patch/Upgrade
CVE Names:         CVE-2021-3156  

Reference:         ESB-2021.2342
                   ESB-2021.1330

Original Bulletin: 
   https://us-cert.cisa.gov/ics/advisories/icsa-21-245-01

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ICS Advisory (ICSA-21-245-01)

Johnson Controls Sensormatic Electronics Illustra

Original release date: September 02, 2021

Legal Notice

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1. EXECUTIVE SUMMARY

  o CVSS v3 7.8
  o ATTENTION: Low attack complexity
  o Vendor: Sensormatic Electronics, LLC, a subsidiary of Johnson Controls,
    Inc.
  o Equipment: Illustra
  o Vulnerability: Off-by-one Error

2. RISK EVALUATION

Successful exploitation of this vulnerability could allow a local attacker to
obtain super user access to the underlying Linux operating system.

3. TECHNICAL DETAILS

3.1 AFFECTED PRODUCTS

Johnson Controls reports this vulnerability affects the following Sensormatic
Electronics Illustra camera systems:

  o Pro Gen 3, All versions prior to 2.8.0
  o Flex Gen 2, All versions prior to 1.9.4
  o Pro 2, All versions
  o Insight, All versions prior to 1.4.0

3.2 VULNERABILITY OVERVIEW

3.2.1 OFF-BY-ONE ERROR CWE-193

Under specific circumstances, a local attacker could exploit this vulnerability
to obtain super user access to the underlying Linux operating system.

CVE-2021-3156 has been assigned to this vulnerability. A CVSS v3 base score of
7.8 has been calculated; the CVSS vector string is ( AV:L/AC:L/PR:L/UI:N/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: Ireland

3.4 RESEARCHER

Johnson Controls reported this vulnerability to CISA.

4. MITIGATIONS

Users are recommended update to one of the following firmware versions:

  o Pro Gen 3, upgrade to Version 2.8.0
  o Flex Gen 2, upgrade to Version 1.9.4
  o Pro 2 is EOL
  o Insight, upgrade to Version 1.4.0

For more detailed mitigation instructions, please see Johnson Controls Product
Security Advisory JCI-PSA-2021-13

Johnson Controls recommends taking steps to minimize risks to all building
automation systems.

CISA recommends users take defensive measures to minimize the risk of
exploitation of this vulnerability. Specifically, users should:

  o Ensure the least-privilege user principle is followed.
  o Restrict physical access to the device to authorized personnel only.

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.cisa.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.cisa.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.

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

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

CISA continuously strives to improve its products and services. You can help by
choosing one of the links below to provide feedback about this product.

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