CVE-2021-21429 : Exploit Details and Defense Strategies

OpenAPI Generator allows the automatic generation of API client libraries, server stubs, documentation, and configuration from an OpenAPI Spec. The CVE-2021-21429 highlights a vulnerability in the OpenAPI Generator Maven plugin that creates temporary files with insecure permissions, potentially exposing application and system data to attacks. Keep reading to understand the impact, technical details, and mitigation strategies for this CVE.

Understanding CVE-2021-21429

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

What is CVE-2021-21429?

CVE-2021-21429 involves the insecure creation of temporary files by the OpenAPI Generator Maven plugin, posing risks to data security and integrity.

The Impact of CVE-2021-21429

The vulnerability allows local attackers to exploit insecure temporary files, potentially compromising data confidentiality and system integrity.

Technical Details of CVE-2021-21429

Explore the specifics of the vulnerability, including affected systems, exploitation mechanisms, and more.

Vulnerability Description

The issue arises from using

File.createTempFile

in JDK, leading to the generation of insecure temporary files that can expose sensitive data to external threats.

Affected Systems and Versions

The vulnerability affects OpenAPI Generator versions prior to v5.1.0, specifically impacting the Maven plug-in functionality for generating API-related components.

Exploitation Mechanism

By exploiting the insecure temporary files created during the generation process, attackers can gain unauthorized access to sensitive application and system data.

Mitigation and Prevention

Discover the steps to mitigate the risks posed by CVE-2021-21429 and prevent potential security breaches.

Immediate Steps to Take

Users are advised to update to version 5.1.0 of OpenAPI Generator to eliminate the vulnerability and ensure secure file handling.

Long-Term Security Practices

Implement secure coding practices to avoid similar vulnerabilities in future software releases and maintain robust data security.

Patching and Updates

Stay informed about security patches and updates provided by OpenAPI Generator to address identified vulnerabilities and enhance overall system security.