CVE-2023-42000 : What You Need to Know

A path traversal vulnerability in the Arcserve UDP agent prior to version 9.2 allows unauthenticated remote attackers to upload arbitrary files to the file system. This article provides insights into the impact, technical details, and mitigation strategies for CVE-2023-42000.

Understanding CVE-2023-42000

This section delves into the specifics of the vulnerability, its impact, affected systems, and how to prevent exploitation.

What is CVE-2023-42000?

Arcserve UDP prior to version 9.2 contains a path traversal vulnerability that enables unauthenticated attackers to upload files to any location on the system.

The Impact of CVE-2023-42000

The vulnerability poses a critical risk, allowing attackers to upload malicious files, compromising confidentiality, integrity, and availability of the system. It is categorized with a CVSS v3.1 base score of 9.8.

Technical Details of CVE-2023-42000

This section outlines the vulnerability description, affected systems and versions, as well as the exploitation mechanism.

Vulnerability Description

The flaw exists in the

com.ca.arcflash.ui.server.servlet.FileHandlingServlet.doUpload()

method, facilitating the unauthorized upload of files by remote attackers.

Affected Systems and Versions

Arcserve UDP versions prior to 9.2 are impacted by this vulnerability, with version 0 being specifically affected.

Exploitation Mechanism

Attackers can exploit this vulnerability remotely without the need for any privileges, leveraging a network-based attack vector with low attack complexity.

Mitigation and Prevention

This section offers guidance on immediate steps to take, long-term security practices, and the importance of patching and updates.

Immediate Steps to Take

Administrators should upgrade Arcserve UDP to version 9.2 or apply vendor-provided patches to mitigate the vulnerability. Additionally, restrict network access to vulnerable systems.

Long-Term Security Practices

Implement proper input validation for file uploads, enforce least privilege access, and monitor network traffic for suspicious activities to enhance overall security posture.

Patching and Updates

Regularly apply security patches released by Arcserve to address known vulnerabilities and protect systems from potential exploits.