CVE-2021-40563 : Security Advisory and Response

This CVE record involves a segmentation fault caused by a null pointer dereference in Gpac through version 1.0.1, resulting in a denial of service.

Understanding CVE-2021-40563

This section provides insights into the nature and impact of the CVE-2021-40563 vulnerability.

What is CVE-2021-40563?

CVE-2021-40563 describes a segmentation fault triggered by a null pointer dereference in Gpac through version 1.0.1. The vulnerability arises in the naludmx_create_avc_decoder_config function in reframe_nalu.c when utilizing mp4box, leading to a denial of service.

The Impact of CVE-2021-40563

The exploitation of this vulnerability can have the following implications:

Denial of service (DoS) attack

Technical Details of CVE-2021-40563

This section delves into the specific technical aspects of CVE-2021-40563.

Vulnerability Description

The vulnerability in Gpac through version 1.0.1 results from a null pointer dereference in the naludmx_create_avc_decoder_config function in reframe_nalu.c when mp4box is in use. This flaw can be exploited to cause a denial of service.

Affected Systems and Versions

Vendor: n/a
Product: n/a
Affected Versions: All versions up to and including 1.0.1

Exploitation Mechanism

The vulnerability can be exploited through the following method:

Utilizing mp4box

Mitigation and Prevention

This section outlines the steps required to mitigate the CVE-2021-40563 vulnerability.

Immediate Steps to Take

To address CVE-2021-40563, consider the following immediate actions:

Apply patches or updates provided by the vendor
Avoid using the affected versions until a fix is available

Long-Term Security Practices

To enhance overall security posture, adopt the following practices:

Regularly update software and systems
Employ security tools to detect and prevent similar vulnerabilities

Patching and Updates

Ensure timely installation of the latest patches and updates released by Gpac to address the CVE-2021-40563 vulnerability.