CVE-2021-40145 : What You Need to Know

This CVE article discusses a double free vulnerability in the GD Graphics Library, affecting versions up to 2.3.2.

Understanding CVE-2021-40145

This section provides insights into the nature of the vulnerability.

What is CVE-2021-40145?

CVE-2021-40145 is a double free vulnerability discovered in gdImageGd2Ptr in the GD Graphics Library, also known as LibGD, up to version 2.3.2.

The Impact of CVE-2021-40145

The vulnerability could be exploited by attackers to potentially execute arbitrary code or cause a denial of service (DoS) condition on affected systems.

Technical Details of CVE-2021-40145

This section delves into the technical aspects of the CVE.

Vulnerability Description

gdImageGd2Ptr in gd_gd2.c in the GD Graphics Library through 2.3.2 experiences a double free vulnerability.

Affected Systems and Versions

Affected Versions: Up to 2.3.2
Vendor: GD Graphics Library
Products: Not applicable

Exploitation Mechanism

The double free vulnerability in gdImageGd2Ptr could be exploited by a remote attacker to crash applications or potentially execute malicious code.

Mitigation and Prevention

Tips on mitigating and preventing the CVE exploit.

Immediate Steps to Take

It's recommended to update the GD Graphics Library to the latest version to mitigate the vulnerability.
Implement strong input validation mechanisms to avoid malicious inputs triggering the exploitation.

Long-Term Security Practices

Regularly monitor security mailing lists for updates on vulnerabilities.
Conduct regular security audits to identify and fix potential vulnerabilities in the system.

Patching and Updates

Apply patches provided by the GD Graphics Library promptly to address the double free vulnerability.