CVE-2021-21898 : Security Advisory and Response

A code execution vulnerability exists in the dwgCompressor::decompress18() functionality of LibreCad libdxfrw 2.2.0-rc2-19-ge02f3580 that allows an attacker to trigger an out-of-bounds write by providing a specially-crafted .dwg file.

Understanding CVE-2021-21898

This section provides insights into the impact, technical details, and mitigation strategies related to CVE-2021-21898.

What is CVE-2021-21898?

CVE-2021-21898 is a high-severity vulnerability in LibreCad libdxfrw 2.2.0-rc2-19-ge02f3580 that enables malicious actors to execute arbitrary code by exploiting an out-of-bounds write issue.

The Impact of CVE-2021-21898

The vulnerability can be exploited by an attacker to craft a malicious .dwg file, leading to unauthorized code execution with high confidentiality, integrity, and availability impacts.

Technical Details of CVE-2021-21898

This section elaborates on the vulnerability description, affected systems, and the exploitation mechanism.

Vulnerability Description

The vulnerability resides in the dwgCompressor::decompress18() function of LibreCad libdxfrw 2.2.0-rc2-19-ge02f3580, allowing attackers to trigger an out-of-bounds write through a specially-crafted .dwg file.

Affected Systems and Versions

The affected product is LibreCAD, specifically version 2.2.0-rc2-19-ge02f3580 of libdxfrw.

Exploitation Mechanism

An attacker can exploit this vulnerability by providing a malicious .dwg file, which triggers the out-of-bounds write in the affected LibreCad library.

Mitigation and Prevention

Learn about the immediate steps to take, long-term security practices, and the importance of patching and updates.

Immediate Steps to Take

Immediately apply security updates provided by the vendor to mitigate the risk of exploitation associated with CVE-2021-21898.

Long-Term Security Practices

Enhance overall system security by regularly updating software, implementing access controls, and conducting security assessments to prevent future vulnerabilities.

Patching and Updates

Stay informed about security advisories and promptly install patches released by LibreCAD to address CVE-2021-21898.