CVE-2022-24893 : Security Advisory and Response

Espressif Bluetooth Mesh Stack Vulnerable to Out-of-bounds Write leading to memory buffer corruption.

Understanding CVE-2022-24893

This CVE involves a vulnerability in Espressif's Bluetooth Mesh SDK (

ESP-BLE-MESH

), specifically in the

SegN

field of the Transaction Start PDU, leading to memory corruption and potential system control by attackers.

What is CVE-2022-24893?

CVE-2022-24893 is a memory corruption vulnerability in the ESP-IDF official development framework for Espressif SoCs. The issue arises in Espressif's Bluetooth Mesh SDK, allowing attackers to trigger memory corruption during provisioning.

The Impact of CVE-2022-24893

The impact of this vulnerability is significant, as it can result in memory corruption related attacks and potentially enable attackers to gain control of the entire system. The CVSS v3.1 base score is 7.5, indicating a high severity vulnerability.

Technical Details of CVE-2022-24893

This section covers specific technical details regarding the vulnerability.

Vulnerability Description

The vulnerability arises from a lack of validation for the

SegN

field of the Transaction Start PDU in the Bluetooth Mesh SDK, leading to memory corruption.

Affected Systems and Versions

The affected versions include

ESP-BLE-MESH

component of

ESP-IDF

with versions less than 4.1.4, greater than 4.2.0 and less than 4.2.4, greater than 4.3.2 and less than 4.3.3, and greater than 4.4.1 and less than 4.4.2.

Exploitation Mechanism

Attackers can exploit this vulnerability during provisioning, potentially gaining control over the system due to memory corruption.

Mitigation and Prevention

To address CVE-2022-24893, users are advised to take immediate steps and implement long-term security practices.

Immediate Steps to Take

Users should upgrade their systems by applying the patch commits available on the 4.1, 4.2, 4.3, and 4.4 branches. Upgrading is crucial for all applications and users of the

ESP-BLE-MESH

component from

ESP-IDF

.

Long-Term Security Practices

In the long term, users should prioritize regular patching and updating of their systems to mitigate security risks and stay protected against potential vulnerabilities.

Patching and Updates

Users should regularly monitor for security updates and apply patches provided by Espressif to ensure their systems are secure against known vulnerabilities.