CVE-2023-1383 : Security Advisory and Response

This CVE, assigned by Bitdefender, was published on May 3, 2023, and affects the Amazon Fire TV Stick 3rd gen and Insignia TV with FireOS. The vulnerability was discovered by the Bitdefender IoT Research Team.

Understanding CVE-2023-1383

This vulnerability involves an Improper Enforcement of Behavioral Workflow in the exchangeDeviceServices function on the amzn.dmgr service. It allows an attacker to register services that are only locally accessible, impacting certain versions of Amazon Fire TV Stick 3rd gen and Insignia TV with FireOS.

What is CVE-2023-1383?

The CVE-2023-1383 vulnerability stems from the improper enforcement of behavioral workflow, enabling an attacker to exploit the exchangeDeviceServices function on the amzn.dmgr service to register services only locally accessible.

The Impact of CVE-2023-1383

The impact of this vulnerability, classified under CAPEC-153 Input Data Manipulation, can result in unauthorized registration of services by attackers, affecting the confidentiality and integrity of the compromised systems.

Technical Details of CVE-2023-1383

This vulnerability has a CVSS v3.1 base score of 5.4, with a medium severity rating. It has a low attack complexity and vector, requiring no special privileges for exploitation, and its impacts include low confidentiality and integrity impact with no availability impact.

Vulnerability Description

The vulnerability allows attackers to register locally accessible services by exploiting the exchangeDeviceServices function on the affected devices.

Affected Systems and Versions

The vulnerability impacts Amazon Fire TV Stick 3rd gen versions prior to 6.2.9.5 and Insignia TV with FireOS versions prior to 7.6.3.3.

Exploitation Mechanism

Attackers can exploit this vulnerability through input data manipulation in the exchangeDeviceServices function on the amzn.dmgr service.

Mitigation and Prevention

To mitigate the CVE-2023-1383 vulnerability, immediate action and long-term security practices are advised, along with applying necessary patches and updates.

Immediate Steps to Take

Users are recommended to install the automatic firmware updates provided by the affected vendors to fix the vulnerability. For Amazon Fire TV Stick 3rd gen, version 6.2.9.5 addresses the issue, and for Insignia TV with FireOS, version 7.6.3.3 includes the necessary fixes.

Long-Term Security Practices

Implementing robust network security measures, regularly updating system software, and monitoring for potential threats can help prevent similar vulnerabilities in the future.

Patching and Updates

Regularly check for updates from the respective vendors to ensure continued protection against security vulnerabilities like CVE-2023-1383.