CVE-2021-32495 : What You Need to Know

A detailed analysis of the use-after-free vulnerability in the radare2 tool, impacting version 5.3.0-git 26142.

Understanding CVE-2021-32495

This section provides insights into the nature of the vulnerability and its impact.

What is CVE-2021-32495?

The CVE-2021-32495 vulnerability is a use-after-free flaw in the pyc parser of radare2, enabling an attacker to read freed memory, leading to denial of service.

The Impact of CVE-2021-32495

The impact of this vulnerability is severe, with a CVSS base score of 10. It allows attackers to cause a denial of service by exploiting the use-after-free flaw.

Technical Details of CVE-2021-32495

Explore the specific technical aspects of the CVE-2021-32495 vulnerability.

Vulnerability Description

Radare2's pyc parser's get_none_object function suffers from a use-after-free vulnerability that lets attackers read freed memory, resulting in a denial of service.

Affected Systems and Versions

The vulnerability affects radare2 version 5.3.0-git 26142, causing a critical impact on systems using this specific version.

Exploitation Mechanism

Exploiting this vulnerability allows attackers to access freed memory, potentially disrupting the availability, confidentiality, and integrity of the system.

Mitigation and Prevention

Discover the steps to mitigate the risks posed by CVE-2021-32495 and prevent future vulnerabilities.

Immediate Steps to Take

It is crucial to update radare2 to a patched version, perform system scans for any signs of exploitation, and monitor for unusual activities.

Long-Term Security Practices

Implement robust security protocols, conduct regular security audits, educate users about safe computing practices, and maintain vigilance against emerging threats.

Patching and Updates

Stay informed about security patches and updates released by radare2 to address CVE-2021-32495 and other vulnerabilities promptly.