CVE-2021-42534

Trane Building Automation Controllers Cross-site Scripting

Description

The affected product’s web application does not properly neutralize the input during webpage generation, which could allow an attacker to inject code in the input forms.

Remediation

Solution:

  • Trane has identified the following specific mitigations for the affected products: Users upgrade Tracer SC controllers running firmware v3.8 and prior, to firmware v4.4 SP7 or higher. Users should contact a regional Trane office to install updated firmware or request additional information and reference Trane service database number HUB-207592. Tracer SC is no longer actively developed, tested, or sold. Tracer SC will be considered end-of-life on December 31, 2022. Trane recommends users identify a migration plan to replace the Tracer SC controller with the Tracer SC+ controller, which can function as a drop-in replacement for Tracer SC, providing significant security upgrades.

Category

6.3
CVSS
Severity: Medium
CVSS 3.1 •
CVSS 2.0 •
EPSS 0.30%
Third-Party Advisory cisa.gov
Affected: Trane Tracer SC
Published at:
Updated at:

References

Link Tags
https://us-cert.cisa.gov/ics/advisories/icsa-21-292-02 third party advisory us government resource

Frequently Asked Questions

What is the severity of CVE-2021-42534?
CVE-2021-42534 has been scored as a medium severity vulnerability.
How to fix CVE-2021-42534?
To fix CVE-2021-42534: Trane has identified the following specific mitigations for the affected products: Users upgrade Tracer SC controllers running firmware v3.8 and prior, to firmware v4.4 SP7 or higher. Users should contact a regional Trane office to install updated firmware or request additional information and reference Trane service database number HUB-207592. Tracer SC is no longer actively developed, tested, or sold. Tracer SC will be considered end-of-life on December 31, 2022. Trane recommends users identify a migration plan to replace the Tracer SC controller with the Tracer SC+ controller, which can function as a drop-in replacement for Tracer SC, providing significant security upgrades.
Is CVE-2021-42534 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2021-42534 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2021-42534?
CVE-2021-42534 affects Trane Tracer SC.
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