CVSS3
Attack Vector
PHYSICAL
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS
Percentile
18.9%
Successful exploitation of this vulnerability could allow an attacker to execute arbitrary commands as root using a specially crafted filename.
Trane reports this vulnerability affects the following thermostats:
3.2.1 INJECTION CWE-74
A command injection vulnerability exists in Trane XL824, XL850, XL1050, and Pivot thermostats allowing an attacker to execute arbitrary commands as root using a specially crafted filename. The vulnerability requires physical access to the device via a USB stick.
CVE-2023-4212 has been assigned to this vulnerability. A CVSS v3 base score of 6.8 has been calculated; the CVSS vector string is (AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H).
Houlton McGuinn reported this vulnerability to Trane.
Trane Technologies has pushed the patch out to all devices. The patch is available to all affected devices. As soon as the device is connected to the internet, it will check for a new firmware version. If a new version is available, the device will download and install it. Other than connecting the device to the internet, no user interaction is required.
If a user wants to verify that they received a patch for this vulnerability, they can verify the firmware version is greater than what is listed above by navigating to the “About” screen on the thermostat. Menu > System Info > About.
For more information, users may contact their local Trane sales office.
Trane has published a service database article on their website (login required).
CISA recommends users take defensive measures to minimize the risk of exploitation of this vulnerability. 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 at cisa.gov/ics. Several CISA products detailing cyber defense best 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 at cisa.gov/ics in the technical information paper, ICS-TIP-12-146-01B–Targeted Cyber Intrusion Detection and Mitigation Strategies.
Organizations observing suspected malicious activity should follow established internal procedures and report findings to CISA for tracking and correlation against other incidents.
No known public exploitation specifically targeting this vulnerability has been reported to CISA at this time. This vulnerability is not exploitable remotely.
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2023-4212
cisa.gov/ics
cisa.gov/ics
cisasurvey.gov1.qualtrics.com/jfe/form/SV_9n4TtB8uttUPaM6?product=https://www.cisa.gov/news-events/ics-advisories/icsa-23-234-02
cwe.mitre.org/data/definitions/74.html
hub.tranetechnologies.com/docs/DOC-216377
public.govdelivery.com/accounts/USDHSCISA/subscriber/new?topic_id=USDHSCISA_138
twitter.com/CISAgov
twitter.com/intent/tweet?text=%E2%80%8BTrane%20Thermostats+https://www.cisa.gov/news-events/ics-advisories/icsa-23-234-02
us-cert.cisa.gov/ics/Recommended-Practices
us-cert.cisa.gov/sites/default/files/recommended_practices/NCCIC_ICS-CERT_Defense_in_Depth_2016_S508C.pdf
www.cisa.gov/uscert/ics/tips/ICS-TIP-12-146-01B
www.dhs.gov
www.dhs.gov/foia
www.dhs.gov/performance-financial-reports
www.facebook.com/CISA
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www.first.org/cvss/calculator/3.0#CVSS:3.0/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
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www.oig.dhs.gov/
www.trane.com/commercial/north-america/us/en/contact-us/locate-sales-offices.html
www.usa.gov/
www.whitehouse.gov/
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