CVE-2021-38448 : Security Advisory and Response
Learn about CVE-2021-38448 impacting Trane Symbio controllers. Discover the vulnerability details, impact, affected versions, and mitigation steps for this code injection threat.
Trane Symbio Improper Control of Generation of Code vulnerability allows attackers to manipulate the software flow on affected controllers, potentially leading to system compromise.
Understanding CVE-2021-38448
This CVE affects Trane's Symbio controllers due to improper input sanitization, enabling code injection attacks.
What is CVE-2021-38448?
The vulnerability arises from the controllers' failure to correctly filter input code, enabling malicious actors to change the software's intended behavior.
The Impact of CVE-2021-38448
With a CVSS base score of 7.5, this vulnerability poses a high risk to affected systems, allowing attackers to disrupt system integrity and availability.
Technical Details of CVE-2021-38448
Trane's Symbio controllers are vulnerable to code injection attacks, affecting versions 700 and 800.
Vulnerability Description
The flaw arises from inadequate input validation, enabling attackers to execute arbitrary code on the controllers.
Affected Systems and Versions
- Symbio 700: Versions less than 1.00.0023
- Symbio 800: Versions less than 1.00.0007
Exploitation Mechanism
Attackers can craft code to alter the controller's flow, potentially leading to unauthorized access or system disruption.
Mitigation and Prevention
To address CVE-2021-38448, Trane recommends immediate firmware updates and implementation of security best practices.
Immediate Steps to Take
- Contact Trane for updated firmware installation
- Upgrade Symbio 700 to v1.00.0023 or later
- Upgrade Symbio 800 to v1.00.0007 or later
Long-Term Security Practices
- Restrict physical controller access
- Use secure remote access solutions
- Manage user credentials securely
- Implement regular software/firmware updates