CVE-2022-31363 : Security Advisory and Response

A buffer overflow vulnerability in Cypress Bluetooth Mesh SDK can allow remote attackers to execute arbitrary code. Here's everything you need to know about CVE-2022-31363.

Understanding CVE-2022-31363

CVE-2022-31363 is a buffer overflow vulnerability in Cypress Bluetooth Mesh SDK that can lead to the execution of arbitrary code by remote attackers.

What is CVE-2022-31363?

In Cypress Bluetooth Mesh SDK, a vulnerability exists that allows for an out-of-bound write during mesh provisioning, triggered by the lack of a check for mismatched SegN and TotalLength in Transaction Start PDU.

The Impact of CVE-2022-31363

The impact of this vulnerability is the ability for remote attackers to execute arbitrary code on affected systems, posing a high confidentiality risk and a low integrity and availability impact.

Technical Details of CVE-2022-31363

This section covers specific technical details of CVE-2022-31363.

Vulnerability Description

The vulnerability arises from an out-of-bound write vulnerability in Cypress Bluetooth Mesh SDK, specifically in the affected function pb_transport_handle_frag_.

Affected Systems and Versions

Vendor and product details are not specified, indicating a broad impact across versions of the affected Bluetooth Mesh SDK.

Exploitation Mechanism

The exploitation can occur during mesh provisioning due to the absence of a check for mismatched SegN and TotalLength in Transaction Start PDU.

Mitigation and Prevention

To protect systems from CVE-2022-31363, consider the following mitigation strategies.

Immediate Steps to Take

Immediately patch or update the Cypress Bluetooth Mesh SDK to eliminate the vulnerability and reduce the risk of exploitation.

Long-Term Security Practices

Implement secure coding practices, conduct regular security audits, and monitor for any abnormal network activities that could indicate an ongoing attack.

Patching and Updates

Stay informed about security updates released by Cypress for the Bluetooth Mesh SDK, and promptly apply these patches to ensure the security of your systems.