CVE-2021-21897 : Vulnerability Insights and Analysis

A code execution vulnerability exists in the DL_Dxf::handleLWPolylineData functionality of Ribbonsoft dxflib 3.17.0. A specially-crafted .dxf file can lead to a heap buffer overflow, allowing an attacker to trigger this vulnerability.

Understanding CVE-2021-21897

This CVE identifies a code execution vulnerability in Ribbonsoft dxflib 3.17.0 that can result in a heap buffer overflow.

What is CVE-2021-21897?

The CVE-2021-21897 vulnerability is caused by a flaw in the DL_Dxf::handleLWPolylineData function of Ribbonsoft dxflib 3.17.0.

The Impact of CVE-2021-21897

The impact of CVE-2021-21897 is rated as HIGH, with a CVSS base score of 8.8. This vulnerability allows an attacker to execute arbitrary code by providing a malicious .dxf file.

Technical Details of CVE-2021-21897

This section provides technical details regarding the vulnerability.

Vulnerability Description

The vulnerability stems from a heap buffer overflow when processing specially-crafted .dxf files, leading to code execution.

Affected Systems and Versions

Ribbonsoft dxflib 3.17.0 is affected by this vulnerability.

Exploitation Mechanism

An attacker can exploit this vulnerability by tricking a user into opening a malicious .dxf file, triggering the heap buffer overflow.

Mitigation and Prevention

To protect systems from CVE-2021-21897, certain measures can be taken.

Immediate Steps to Take

Users should avoid opening untrusted .dxf files and ensure that antivirus software is up to date to detect and prevent malicious files.

Long-Term Security Practices

Implementing code reviews, secure coding practices, and regular security audits can help prevent similar vulnerabilities in the future.

Patching and Updates

It is essential to apply patches and updates provided by Ribbonsoft to fix the vulnerability and enhance system security.