CVE-2023-39534 : Exploit Details and Defense Strategies

A vulnerability has been identified in eProsima Fast DDS, impacting versions prior to 2.6.5, >= 2.7.0, and < 2.9.2. The issue is triggered by a malformed GAP submessage, leading to an assertion failure.

Understanding CVE-2023-39534

This section delves into the details of CVE-2023-39534.

What is CVE-2023-39534?

The CVE-2023-39534 vulnerability affects eProsima Fast DDS, a C++ implementation of the Data Distribution Service standard. It allows a malformed GAP submessage to cause an assertion failure in FastDDS versions prior to 2.10.0, 2.9.2, and 2.6.5.

The Impact of CVE-2023-39534

The vulnerability can be exploited by an attacker to crash the FastDDS system by sending a specially crafted GAP submessage, impacting the availability of the system.

Technical Details of CVE-2023-39534

This section provides technical insights into CVE-2023-39534.

Vulnerability Description

A malformed GAP submessage triggers an assertion failure, leading to a denial-of-service condition in affected FastDDS versions.

Affected Systems and Versions

Vendor: eProsima
Product: Fast-DDS
Affected Versions: < 2.6.5, >= 2.7.0, < 2.9.2

Exploitation Mechanism

Attackers can exploit this vulnerability by sending a specifically crafted GAP submessage to the FastDDS system, causing it to crash.

Mitigation and Prevention

This section outlines steps to mitigate and prevent CVE-2023-39534.

Immediate Steps to Take

Users are advised to update their FastDDS installations to version 2.10.0, 2.9.2, or 2.6.5 to apply the necessary patch and prevent exploitation of this vulnerability.

Long-Term Security Practices

Regularly update and patch software to ensure systems are protected from known vulnerabilities and follow security best practices to enhance overall cybersecurity.

Patching and Updates

Vendor patches are available in Fast-DDS versions 2.10.0, 2.9.2, and 2.6.5 to address the CVE-2023-39534 vulnerability.