Johnson Controls exacqVision

1. EXECUTIVE SUMMARY

• CVSS v3 7.5
• ATTENTION: Exploitable remotely/low attack complexity
• Vendor: Exacq Technologies, a subsidiary of Johnson Controls, Inc.
• Equipment: exacqVision Server 32-bit
• Vulnerability: Integer Overflow or Wraparound

2. RISK EVALUATION

Successful exploitation of this vulnerability could allow an unauthenticated remote user to exploit an integer overflow in the exacqVision Server with a specially crafted script and cause a denial-of-service condition.

3. TECHNICAL DETAILS

3.1 AFFECTED PRODUCTS

The following versions of Exacq Technologies’ exacqVision surveillance video software products are affected:

• exacqVision Server 32-bit: Versions 21.06.11.0 and prior

3.2 VULNERABILITY OVERVIEW

3.2.1    INTEGER OVERFLOW OR WRAPAROUND CWE-190

The affected product is vulnerable to an integer overflow vulnerability, which may allow an attacker to cause a denial-of-service condition.

CVE-2021-27665 has been assigned to this vulnerability. A CVSS v3 base score of 7.5 has been calculated; the CVSS vector string is (AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H).

3.3 BACKGROUND

• CRITICAL INFRASTRUCTURE SECTORS: Critical Manufacturing
• COUNTRIES/AREAS DEPLOYED: Worldwide
• COMPANY HEADQUARTERS LOCATION: Ireland

3.4 RESEARCHER

Tenable Research reported this vulnerability to Johnson Controls.

4. MITIGATIONS

Johnson Controls recommends the following:

• Upgrade exacqVision Server 32-bit to Version 21.09 or upgrade to exacqVision Server 64-bit.
• Current users can obtain the critical software update from the software download location.
• For more detailed mitigation instructions, please see Johnson Controls Product Security Advisory JCI-PSA-2021-18v1
• Aligning with CISA recommendations, Johnson Controls recommends taking steps to minimize risks to all building automation systems.

Further ICS security notices and product security guidance are located at the Johnson Controls product security website.



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.

CISA also recommends users take the following measures to protect themselves from social engineering attacks:

• Do not click web links or open unsolicited attachments in email messages.
• Refer to Recognizing and Avoiding Email Scams for more information on avoiding email scams.
• Refer to Avoiding Social Engineering and Phishing Attacks for more information on social engineering attacks.

No known public exploits specifically target this vulnerability.