CVE-2023-48308 : Security Advisory and Response

A Calendar app vulnerability in Nextcloud exposes sensitive system information due to uncleared debug information when errors occur during appointment editing.

Understanding CVE-2023-48308

This CVE highlights a security issue in the Nextcloud Calendar app that allows attackers to access sensitive server information.

What is CVE-2023-48308?

The vulnerability in the Calendar app for Nextcloud enables attackers to gain access to stack traces and internal server paths by triggering an exception during calendar appointment editing.

The Impact of CVE-2023-48308

Exploiting this vulnerability could lead to the exposure of critical system details, compromising the confidentiality and integrity of the server.

Technical Details of CVE-2023-48308

This section provides insight into the specific details of the CVE.

Vulnerability Description

The issue occurs in the Nextcloud Calendar app, exposing stack traces and server paths when errors are encountered during appointment editing.

Affected Systems and Versions

The Nextcloud Calendar app versions between 3.0.0 and 4.5.3 are affected by this vulnerability.

Exploitation Mechanism

Attackers can exploit this vulnerability by deliberately triggering errors while editing calendar appointments to access sensitive server information.

Mitigation and Prevention

To address CVE-2023-48308, certain steps and security practices are recommended.

Immediate Steps to Take

It is crucial to upgrade the Nextcloud Calendar app to version 4.5.3 or above to mitigate this vulnerability effectively.

Long-Term Security Practices

Implementing robust error handling mechanisms and regularly updating software can help prevent similar security issues in the future.

Patching and Updates

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