CVE-2023-41899 : Exploit Details and Defense Strategies

Home Assistant Core is affected by a partial Server-Side Request Forgery vulnerability, allowing an attacker to invoke Supervisor REST API endpoints. It has a CVSS base score of 6.6.

Understanding CVE-2023-41899

This CVE details a Server-Side Request Forgery (SSRF) vulnerability in Home Assistant Core, which could result in high impacts on confidentiality, integrity, and availability.

What is CVE-2023-41899?

In affected versions of Home Assistant Core, an attacker could exploit the

hassio.addon_stdin

service to trigger a partial SSRF vulnerability. By leveraging this weakness, the attacker might access Supervisor REST API endpoints through a POST request, thus gaining control over the data dictionary, including addon and input key/values.

The Impact of CVE-2023-41899

The vulnerability poses a significant risk with a CVSS base score of 6.6, potentially leading to high impacts on confidentiality, integrity, and availability of the affected systems.

Technical Details of CVE-2023-41899

This section covers specific technical aspects of the vulnerability.

Vulnerability Description

The vulnerability allows an attacker to perform a partial SSRF attack by exploiting the

hassio.addon_stdin

service in Home Assistant Core, enabling unauthorized access to Supervisor REST API endpoints.

Affected Systems and Versions

Home Assistant Core versions prior to 2023.9.0 are affected by this vulnerability.

Exploitation Mechanism

Attackers can trigger this vulnerability by making use of the

hassio.addon_stdin

service, enabling them to call Supervisor REST API endpoints with a POST request.

Mitigation and Prevention

To address CVE-2023-41899 and enhance security, users should take immediate steps and follow long-term security practices.

Immediate Steps to Take

All users are strongly advised to upgrade to version 2023.9.0 or newer to mitigate the risk of exploitation. No known workarounds are available for this vulnerability.

Long-Term Security Practices

Maintain a proactive security posture by regularly updating and patching Home Assistant Core to prevent potential SSRF attacks.

Patching and Updates

Stay informed about security advisories and update notifications from Home Assistant to promptly apply patches and ensure system security.