CVE-2023-42459 : Exploit Details and Defense Strategies

Fast DDS is a C++ implementation of the DDS (Data Distribution Service) standard of the OMG (Object Management Group). In affected versions specific DATA submessages can be sent to a discovery locator which may trigger a free error. This can remotely crash any Fast-DDS process. The call to free() could potentially leave the pointer in the attacker's control which could lead to a double free. This issue has been addressed in versions 2.12.0, 2.11.3, 2.10.3, and 2.6.7. Users are advised to upgrade. There are no known workarounds for this vulnerability.

Understanding CVE-2023-42459

This CVE impacts Fast-DDS due to a malformed DATA submessage leading to a bad-free error, potentially causing a double free or use-after-free scenario.

What is CVE-2023-42459?

CVE-2023-42459 involves Fast-DDS where specific DATA submessages trigger a free error, potentially crashing the process and leading to the risk of a double free scenario.

The Impact of CVE-2023-42459

The impact of CVE-2023-42459 is significant, as it allows attackers to remotely crash Fast-DDS processes and potentially gain control over pointers, leading to exploit scenarios like double free.

Technical Details of CVE-2023-42459

This section provides technical details regarding the vulnerability in Fast-DDS.

Vulnerability Description

The vulnerability stems from the handling of specific DATA submessages, leading to a bad-free error that can result in a double free condition, posing a significant security risk.

Affected Systems and Versions

Vendor: eProsima
Product: Fast-DDS

Affected Versions:

Version >= 2.11.0, <= 2.11.1
Version >= 2.10.0, < 2.10.3
Version < 2.6.7

Exploitation Mechanism

Attackers can exploit this vulnerability by sending crafted DATA submessages to a discovery locator, initiating free errors that may result in crashing Fast-DDS processes and potential control over memory pointers.

Mitigation and Prevention

To address CVE-2023-42459, users and administrators are advised to take immediate action to secure their systems.

Immediate Steps to Take

Upgrade Fast-DDS to versions 2.12.0, 2.11.3, 2.10.3, or 2.6.7 to mitigate the vulnerability.

Long-Term Security Practices

Implement secure coding practices and regularly update software to prevent such vulnerabilities in the future.

Patching and Updates

Stay informed about security updates and patches released by eProsima and apply them promptly to ensure the security of Fast-DDS systems.