CVE-2021-40574 : Exploit Details and Defense Strategies

CVE-2021-40574, published on January 13, 2022, involves a double-free vulnerability in the gf_text_get_utf8_line function of the binary MP4Box in Gpac 1.0.1. This flaw can lead to denial of service, code execution, and privilege escalation.

Understanding CVE-2021-40574

This section provides insights into the nature and impact of CVE-2021-40574.

What is CVE-2021-40574?

CVE-2021-40574 is a security vulnerability found in Gpac 1.0.1's MP4Box binary, specifically in the gf_text_get_utf8_line function within load_text.c. The issue allows malicious actors to trigger a denial of service, potential code execution, and privilege escalation.

The Impact of CVE-2021-40574

The vulnerability presents severe consequences:

Denial of service attacks can disrupt normal system functionality.
Attackers could potentially execute arbitrary code, leading to further system compromise.
Privilege escalation could grant unauthorized access to sensitive resources.

Technical Details of CVE-2021-40574

Explore detailed technical aspects of CVE-2021-40574.

Vulnerability Description

The vulnerability arises from a double-free flaw in the gf_text_get_utf8_line function of Gpac 1.0.1's MP4Box binary.

Affected Systems and Versions

Vendor: n/a
Product: n/a
Versions Affected: n/a (all versions are affected)

Exploitation Mechanism

The exploit involves manipulating the gf_text_get_utf8_line function to trigger the double-free defect, facilitating denial of service, code execution, and privilege escalation.

Mitigation and Prevention

Learn how to mitigate and prevent CVE-2021-40574.

Immediate Steps to Take

Update Gpac to the latest version that includes a patch for CVE-2021-40574.
Implement network segmentation to limit the impact of potential attacks.
Monitor system logs for any suspicious activity.

Long-Term Security Practices

Conduct regular security audits and vulnerability assessments.
Train employees on identifying and reporting security issues.

Patching and Updates

Stay informed about security patches released by Gpac.
Promptly apply updates to ensure protection against known vulnerabilities.