CVE-2023-21667 : Vulnerability Insights and Analysis

This CVE record pertains to a vulnerability identified in Qualcomm's Snapdragon products related to a transient denial of service (DOS) issue in Bluetooth HOST caused when passing a descriptor to validate the blacklisted Bluetooth keyboard.

Understanding CVE-2023-21667

This section delves into the specifics of CVE-2023-21667, shedding light on the nature of the vulnerability and its potential impacts.

What is CVE-2023-21667?

CVE-2023-21667 involves a buffer over-read vulnerability in the Bluetooth HOST component of Snapdragon products developed by Qualcomm. The vulnerability arises during the validation process of blacklisted Bluetooth keyboards, leading to a transient DOS condition.

The Impact of CVE-2023-21667

The vulnerability poses a medium threat with a base severity score of 6.5 due to the potential high impact on availability. While the confidentiality and integrity impacts are assessed as none, there is a low level of privileges required for exploitation with low user interaction.

Technical Details of CVE-2023-21667

This section provides a detailed overview of the technical aspects related to CVE-2023-21667, including the vulnerability description, affected systems and versions, as well as the exploitation mechanism.

Vulnerability Description

The vulnerability involves a buffer over-read issue in the Bluetooth HOST component of Snapdragon products when processing descriptors to blacklist Bluetooth keyboards. This flaw can lead to a transient denial of service condition.

Affected Systems and Versions

The vulnerability impacts various Snapdragon products, including but not limited to QCA6390, QCA6426, QCC5100, SD865 5G, SD870, and WSA8835 among others. The affected versions of these products are susceptible to exploitation.

Exploitation Mechanism

The exploit scenario for CVE-2023-21667 is considered general, with a low attack complexity and the requirement for network access. The exploit has the potential to cause a high impact on availability while maintaining an unchanged scope.

Mitigation and Prevention

In order to address and mitigate the risks associated with CVE-2023-21667, certain steps and security practices can be implemented to enhance the overall security posture.

Immediate Steps to Take

Review and apply patches provided by Qualcomm to address the vulnerability promptly.
Implement network segmentation measures to minimize exposure to potential attacks targeting the Bluetooth HOST component.

Long-Term Security Practices

Regularly monitor vendor advisories and security bulletins for updates on patches and vulnerabilities related to Qualcomm products.
Implement security controls and best practices for Bluetooth device management and validation processes.

Patching and Updates

Stay informed about the latest security updates and patches released by Qualcomm for the affected Snapdragon products. Regularly update the firmware and software of affected devices to mitigate the risk of exploitation associated with CVE-2023-21667.