CVE-2021-34685 : What You Need to Know

UploadService in Hitachi Vantara Pentaho Business Analytics through 9.1 allows an authenticated user to upload files of different types, leading to remote code execution via a file extension bypass.

Understanding CVE-2021-34685

This CVE highlights a vulnerability in the Hitachi Vantara Pentaho Business Analytics platform that enables an attacker to upload malicious files by bypassing file type restrictions.

What is CVE-2021-34685?

The vulnerability in UploadService in Hitachi Vantara Pentaho Business Analytics through 9.1 enables authenticated users to upload various files, including forbidden file types like .jsp files, leading to remote code execution.

The Impact of CVE-2021-34685

An attacker can exploit this vulnerability to upload and execute malicious code, potentially compromising the confidentiality, integrity, and availability of the affected system.

Technical Details of CVE-2021-34685

This section provides detailed technical insights into the vulnerability.

Vulnerability Description

UploadService in Hitachi Vantara Pentaho Business Analytics through 9.1 does not properly verify uploaded user files, allowing the upload of forbidden file types, such as .jsp files, which can lead to remote code execution.

Affected Systems and Versions

All versions of Hitachi Vantara Pentaho Business Analytics through 9.1 are affected by this vulnerability.

Exploitation Mechanism

Authenticated users can exploit this vulnerability to upload files with malicious content, bypassing the platform's file type restrictions and potentially executing remote code.

Mitigation and Prevention

To protect systems from CVE-2021-34685, immediate steps and long-term security practices are essential.

Immediate Steps to Take

Apply relevant security patches provided by Hitachi Vantara to address this vulnerability.
Review and restrict user permissions to limit the impact of potential file uploads.

Long-Term Security Practices

Conduct regular security audits and penetration testing on the platform to identify and address vulnerabilities proactively.
Educate users about safe file upload practices and the risks associated with unauthorized file uploads.

Patching and Updates

Regularly update Hitachi Vantara Pentaho Business Analytics to the latest version that includes security patches to prevent exploitation of this vulnerability.