CVE-2021-40565 : What You Need to Know

This CVE record outlines a Segmentation fault caused by a null pointer dereference vulnerability in Gpac through version 1.0.1, leading to denial of service.

Understanding CVE-2021-40565

This section will provide insights into the nature and impact of the CVE-2021-40565 vulnerability.

What is CVE-2021-40565?

The vulnerability is a result of a null pointer dereference issue in Gpac through version 1.0.1 affecting the gf_avc_parse_nalu function in av_parsers.c when using mp4box.

The Impact of CVE-2021-40565

The vulnerability leads to a denial of service (DoS) due to a Segmentation fault caused by the null pointer dereference.

Technical Details of CVE-2021-40565

In this section, we will delve deeper into the technical aspects of CVE-2021-40565.

Vulnerability Description

The vulnerability is a null pointer dereference issue in Gpac through version 1.0.1 via the gf_avc_parse_nalu function in av_parsers.c when using mp4box.

Affected Systems and Versions

Vendor: n/a
Product: n/a
Affected Version: n/a

Exploitation Mechanism

Exploiting this vulnerability involves triggering the null pointer dereference in the gf_avc_parse_nalu function using mp4box, resulting in a Segmentation fault and subsequent denial of service.

Mitigation and Prevention

Explore the necessary steps to mitigate and prevent exploitation of CVE-2021-40565.

Immediate Steps to Take

Update Gpac to a non-vulnerable version immediately.
Implement network controls to restrict access to vulnerable systems.

Long-Term Security Practices

Regularly update software and firmware to patch vulnerabilities.
Conduct security training for developers on secure coding practices.

Patching and Updates

Monitor security advisories for Gpac to apply relevant patches promptly.
Follow best practices for software deployment and configuration management.