CVE-2023-39947 : Vulnerability Insights and Analysis

A heap overflow vulnerability has been identified in eProsima Fast DDS, impacting versions prior to 2.11.1, 2.10.2, 2.9.2, and 2.6.6. This vulnerability, assigned the CVE ID CVE-2023-39947, allows remote attackers to crash Fast-DDS processes.

Understanding CVE-2023-39947

This section delves into the details of the heap overflow vulnerability affecting eProsima Fast DDS.

What is CVE-2023-39947?

CVE-2023-39947 is a heap-based buffer overflow vulnerability identified in the Data Distribution Service standard implementation by eProsima. The issue arises from malformed

PID_PROPERTY_LIST

parameters, leading to a heap overflow and potential remote crashing of Fast DDS processes.

The Impact of CVE-2023-39947

This vulnerability poses a high severity risk, with a base CVSS score of 8.2. Attackers can exploit this flaw to trigger a remote crash in affected Fast DDS instances.

Technical Details of CVE-2023-39947

In this section, we provide insights into the technical aspects of the CVE-2023-39947 vulnerability.

Vulnerability Description

The vulnerability stems from improper handling of

PID_PROPERTY_LIST

parameters, resulting in a heap overflow scenario within Fast DDS, potentially leading to a crash.

Affected Systems and Versions

The affected product is eProsima Fast DDS, with the following impacted versions:

Versions prior to 2.6.6
Versions >= 2.7.0, < 2.9.2
Versions >= 2.10.0, < 2.10.2
Version = 2.11.0

Exploitation Mechanism

Remote attackers can exploit this vulnerability by sending malicious

PID_PROPERTY_LIST

parameters, triggering a heap overflow and causing a crash in Fast DDS processes.

Mitigation and Prevention

This section outlines the steps to mitigate and prevent the exploitation of CVE-2023-39947 in eProsima Fast DDS.

Immediate Steps to Take

Users are advised to update their eProsima Fast DDS installations to versions 2.11.1, 2.10.2, 2.9.2, or 2.6.6, which include a patch to address the heap overflow vulnerability.

Long-Term Security Practices

Incorporating secure coding practices, conducting regular security assessments, and staying informed about security updates are essential for maintaining a secure environment.

Patching and Updates

Regularly monitor vendor updates and security advisories to ensure timely implementation of patches and security fixes to safeguard against known vulnerabilities.