CVE-2021-40564 : Exploit Details and Defense Strategies

This CVE record discusses a Segmentation fault caused by null pointer dereference vulnerability in Gpac through version 1.0.2, resulting in a denial of service.

Understanding CVE-2021-40564

This section provides insights into the nature and impact of CVE-2021-40564.

What is CVE-2021-40564?

CVE-2021-40564 entails a Segmentation fault due to a null pointer dereference vulnerability in Gpac through version 1.0.2. The vulnerability arises in the avc_parse_slice function in av_parsers.c when using mp4box, leading to a denial of service.

The Impact of CVE-2021-40564

The vulnerability can be exploited to cause a denial of service, affecting the availability of the system or service.

Technical Details of CVE-2021-40564

In this section, we delve into the technical aspects of CVE-2021-40564.

Vulnerability Description

The vulnerability is a Segmentation fault triggered by a null pointer dereference in Gpac through version 1.0.2, primarily when utilizing the avc_parse_slice function in av_parsers.c via mp4box.

Affected Systems and Versions

Vendor: n/a
Product: n/a
Versions Affected: All versions up to and including 1.0.2

Exploitation Mechanism

The vulnerability can be exploited by malicious actors to initiate a denial of service attack, impacting system availability.

Mitigation and Prevention

Learn about the steps to mitigate and prevent the exploitation of CVE-2021-40564.

Immediate Steps to Take

Consider restricting access to affected systems.
Apply vendor patches or updates promptly.

Long-Term Security Practices

Follow secure coding practices to avoid null pointer dereference vulnerabilities.
Regularly update and patch software to address known vulnerabilities.

Patching and Updates

Ensure timely installation of patches and updates issued by Gpac to address the CVE-2021-40564 vulnerability.