CVE-2023-46256 Explained : Impact and Mitigation

A detailed analysis of the PX4-Autopilot Heap Buffer Overflow Bug CVE-2023-46256.

Understanding CVE-2023-46256

This section provides insights into the nature of the vulnerability and its impact.

What is CVE-2023-46256?

The CVE-2023-46256, also known as the PX4-Autopilot Heap Buffer Overflow Bug, affects PX4-Autopilot versions 1.14.0-rc1 and prior. It arises due to a heap buffer overflow vulnerability in the parser function, leading to unexpected drone behavior.

The Impact of CVE-2023-46256

The vulnerability allows malicious applications to exploit the parser function, potentially causing erratic drone behavior even in the absence of sensor device malfunction. This could compromise the integrity of drone operations and data.

Technical Details of CVE-2023-46256

Delve into the specific technical aspects of the CVE-2023-46256 vulnerability.

Vulnerability Description

In PX4-Autopilot versions 1.14.0-rc1 and below, the heap buffer overflow vulnerability in the parser function results from the missing validation of the

parserbuf_index

value. This flaw permits the writing of oversized data to the heap memory area.

Affected Systems and Versions

PX4-Autopilot versions 1.14.0-rc1 and earlier are vulnerable to the CVE-2023-46256 heap buffer overflow bug.

Exploitation Mechanism

Malicious actors can exploit this vulnerability by crafting specific requests to trigger the parser function's buffer overflow, leading to potential heap memory corruption and subsequent erratic drone behavior.

Mitigation and Prevention

Explore the steps to mitigate and prevent the CVE-2023-46256 vulnerability.

Immediate Steps to Take

Users of PX4-Autopilot are advised to restrict network access to vulnerable systems, apply temporary fixes if available, and closely monitor drone behavior and system logs for any anomalies.

Long-Term Security Practices

Implement secure coding practices, perform regular security audits, and stay informed about patch releases and updates from the PX4 community.

Patching and Updates

As of the publication date, no fixed version addressing CVE-2023-46256 is available. Users are urged to regularly check for updates from PX4 to apply patches promptly.