CVE-2021-4295 : What You Need to Know

A vulnerability affecting ONC code-validator-api up to version 1.0.30 has been identified. This vulnerability is related to the function vocabularyValidationConfigurations in the XML Handler component's CodeValidatorApiConfiguration.java file, leading to xml external entity reference. Upgrading to version 1.0.31, with patch identifier fbd8ea121755a2d3d116b13f235bc8b61d8449af, is recommended to mitigate this issue.

Understanding CVE-2021-4295

This section provides insights into the CVE-2021-4295 vulnerability.

What is CVE-2021-4295?

The CVE-2021-4295 vulnerability is classified as problematic due to its impact on ONC code-validator-api versions up to 1.0.30. It specifically affects the vocabularyValidationConfigurations function in the XML Handler component, introducing xml external entity reference.

The Impact of CVE-2021-4295

The manipulation allowed by CVE-2021-4295 can result in xml external entity reference, posing a security risk to affected systems.

Technical Details of CVE-2021-4295

In this section, technical aspects of CVE-2021-4295 are discussed.

Vulnerability Description

The vulnerability in ONC code-validator-api versions up to 1.0.30 allows for xml external entity reference through the vocabularyValidationConfigurations function.

Affected Systems and Versions

ONC code-validator-api versions 1.0.0 to 1.0.30 are affected by this vulnerability, particularly impacting modules utilizing the XML Handler component.

Exploitation Mechanism

Exploiting the CVE-2021-4295 vulnerability involves manipulating unknown data to trigger xml external entity reference within the affected components.

Mitigation and Prevention

This section outlines the steps to mitigate and prevent exploitation of CVE-2021-4295.

Immediate Steps to Take

Upgrade the ONC code-validator-api to version 1.0.31, which contains the necessary patch (fbd8ea121755a2d3d116b13f235bc8b61d8449af) to address the vulnerability.

Long-Term Security Practices

Adopting regular security updates and monitoring practices can help prevent similar vulnerabilities in the future.

Patching and Updates

Frequent patching and updating of software components, along with following best security practices, can enhance overall system security.