CVE-2021-32652 : Vulnerability Insights and Analysis

Nextcloud Mail is a mail app for the Nextcloud platform that was found to have a vulnerability that allows authenticated users to access mail metadata of other users. This CVE-2021-32652 affects Nextcloud Mail versions < 1.4.3 and >= 1.5.5, < 1.8.2. Here is a detailed analysis of the issue:

Understanding CVE-2021-32652

The vulnerability identified as CVE-2021-32652 in Nextcloud Mail allows unauthorized access to email metadata.

What is CVE-2021-32652?

A missing permission check in earlier versions of Nextcloud Mail enables authenticated users to view mail metadata of other users, potentially compromising confidentiality, integrity, and availability.

The Impact of CVE-2021-32652

The impact of this CVE is rated as HIGH, affecting confidentiality, integrity, and availability. Attackers can exploit this vulnerability without user interaction, making it critical.

Technical Details of CVE-2021-32652

This section covers the technical aspects of the CVE in more detail.

Vulnerability Description

The vulnerability results from a missing permission check, making it possible for authenticated users to access mail metadata of other users.

Affected Systems and Versions

Nextcloud Mail versions < 1.4.3 and >= 1.5.5, < 1.8.2 are affected by this vulnerability.

Exploitation Mechanism

Attackers with authenticated user access can exploit the missing permission check to retrieve mail metadata of other users.

Mitigation and Prevention

To safeguard your system from this vulnerability, follow these precautionary measures:

Immediate Steps to Take

Update Nextcloud Mail to version 1.4.3 or 1.8.2 that contains patches for this vulnerability.

Long-Term Security Practices

Regularly update and patch Nextcloud Mail to mitigate future security risks.

Patching and Updates

Stay informed about security advisories and promptly apply patches to address known vulnerabilities.