CVE-2022-31358 : Security Advisory and Response

A reflected cross-site scripting (XSS) vulnerability in Proxmox Virtual Environment prior to v7.2-3 allows remote attackers to execute arbitrary web scripts or HTML via non-existent endpoints under path /api2/html/.

Understanding CVE-2022-31358

This CVE identifies a security issue in Proxmox Virtual Environment that could be exploited by attackers to run malicious scripts or HTML code remotely.

What is CVE-2022-31358?

The CVE-2022-31358 is a reflected cross-site scripting vulnerability found in Proxmox Virtual Environment versions prior to v7.2-3. This vulnerability enables attackers to execute unauthorized scripts or HTML code via non-existent endpoints within the /api2/html/ path.

The Impact of CVE-2022-31358

Exploitation of this vulnerability could allow malicious actors to carry out cross-site scripting attacks, leading to the execution of arbitrary scripts or HTML content on the targeted Proxmox Virtual Environment, potentially compromising sensitive data and system integrity.

Technical Details of CVE-2022-31358

This section delves into the technical aspects of the CVE, including its description, affected systems and versions, as well as the exploitation mechanism.

Vulnerability Description

The vulnerability arises from improper input validation within Proxmox Virtual Environment, which could be manipulated by attackers to inject malicious scripts or HTML code into the application.

Affected Systems and Versions

All Proxmox Virtual Environment versions prior to v7.2-3 are affected by this vulnerability, potentially putting those systems at risk of exploitation.

Exploitation Mechanism

Remote attackers can exploit this vulnerability by sending crafted requests containing malicious scripts or HTML code to non-existent endpoints under the /api2/html/ path, tricking the application into executing the unauthorized code.

Mitigation and Prevention

To safeguard your system from CVE-2022-31358, consider implementing immediate action as well as long-term security practices.

Immediate Steps to Take

Update Proxmox Virtual Environment to at least version v7.2-3 to patch the vulnerability.
Monitor and filter input to prevent the injection of malicious scripts or HTML code.

Long-Term Security Practices

Regularly apply security updates and patches to your Proxmox Virtual Environment.
Conduct security assessments and audits to identify and remediate any potential vulnerabilities.

Patching and Updates

Ensure timely application of vendor-released patches and updates to maintain the security and integrity of your Proxmox Virtual Environment.