CVE-2021-40648 : Security Advisory and Response

In this article, we will delve into the details of CVE-2021-40648, focusing on the impact, technical details, and mitigation strategies.

Understanding CVE-2021-40648

CVE-2021-40648 involves a vulnerability in man2html 1.6g that allows an attacker to overwrite parameters and cause memory corruption.

What is CVE-2021-40648?

The vulnerability in man2html 1.6g allows for memory corruption by manipulating chunk parameters, leading to arbitrary memory freeing.

The Impact of CVE-2021-40648

The exploitation of this vulnerability can result in unauthorized freeing of memory, potentially enabling arbitrary code execution by malicious actors.

Technical Details of CVE-2021-40648

Explore the technical aspects and specifics of the vulnerability.

Vulnerability Description

In man2html 1.6g, attackers can craft a filename to alter chunk parameters and perform arbitrary memory freeing, posing a security risk.

Affected Systems and Versions

The vulnerability affects all versions of man2html 1.6g, leaving systems vulnerable to memory manipulation attacks.

Exploitation Mechanism

By creating a specially crafted filename, attackers overwrite chunk parameters to initiate memory manipulation, leading to unauthorized memory freeing.

Mitigation and Prevention

Learn how to address and prevent the exploitation of CVE-2021-40648.

Immediate Steps to Take

Update man2html to the latest patched version
Implement robust input validation to mitigate filename manipulation

Long-Term Security Practices

Regular security audits to detect and address memory-related vulnerabilities
Train developers on secure coding practices to prevent similar issues

Patching and Updates

Stay informed about security patches and promptly apply updates to safeguard systems against known vulnerabilities.