CVE-2021-40569 : Exploit Details and Defense Strategies

This article provides details about CVE-2021-40569, a double-free vulnerability in the binary MP4Box in Gpac through version 1.0.1.

Understanding CVE-2021-40569

CVE-2021-40569 is a vulnerability in the iloc_entry_del function in box_code_meta.c, allowing attackers to trigger a denial of service attack.

What is CVE-2021-40569?

The binary MP4Box in Gpac through version 1.0.1 has a double-free vulnerability in the iloc_entry_del function in box_code_meta.c, enabling denial of service attacks.

The Impact of CVE-2021-40569

This vulnerability allows attackers to cause a denial of service, potentially disrupting systems and services that rely on the affected software.

Technical Details of CVE-2021-40569

CVE-2021-40569 involves the following technical aspects:

Vulnerability Description

The double-free vulnerability in the iloc_entry_del function in box_code_meta.c of the binary MP4Box in Gpac through version 1.0.1 leads to a denial of service.

Affected Systems and Versions

The vulnerability affects the following:

Vendor: n/a
Product: n/a
Versions: All versions are impacted.

Exploitation Mechanism

Attackers can exploit this vulnerability by triggering the iloc_entry_del function in box_code_meta.c, causing a double-free condition and leading to a denial of service.

Mitigation and Prevention

To mitigate the risks associated with CVE-2021-40569, consider the following steps:

Immediate Steps to Take

Apply the patch provided by the vendor immediately.
Monitor for any suspicious activity on the system.

Long-Term Security Practices

Regularly update software and systems to prevent known vulnerabilities.
Implement network security measures to detect and prevent attacks.

Patching and Updates

Ensure the software is updated to the latest version to apply the necessary patches and security fixes.