CVE-2023-48307 : Vulnerability Insights and Analysis

A vulnerability has been identified in Nextcloud Mail app, making it susceptible to Server-Side Request Forgery (SSRF) attacks. This article delves into the details of CVE-2023-48307 to help users understand the impact, technical aspects, and mitigation strategies.

Understanding CVE-2023-48307

Nextcloud Mail app is vulnerable to SSRF attacks, allowing threat actors to manipulate unprotected endpoints in the app.

What is CVE-2023-48307?

CVE-2023-48307 highlights a security flaw in Nextcloud Mail versions between 1.13.0 and 2.2.8, as well as 3.1.0 and 3.3.0. Attackers can exploit an endpoint within the Mail app to launch SSRF attacks.

The Impact of CVE-2023-48307

The vulnerability poses a low-severity risk with a CVSS v3.1 base score of 3.5, affecting the confidentiality, integrity, and availability of the Nextcloud Mail app. Attack complexity is low with a requirement of user interaction.

Technical Details of CVE-2023-48307

This section provides insights into the vulnerability description, affected systems, and the exploitation mechanism.

Vulnerability Description

The vulnerability stems from an unprotected endpoint in the Nextcloud Mail app, enabling attackers to initiate SSRF attacks between specific versions.

Affected Systems and Versions

Nextcloud Mail versions from 1.13.0 to 2.2.8 and versions 3.1.0 to 3.3.0 are susceptible to this vulnerability, potentially impacting users of these specific versions.

Exploitation Mechanism

Threat actors can exploit the unprotected endpoint in the Mail app to manipulate servers and launch SSRF attacks, compromising the integrity and availability of the affected systems.

Mitigation and Prevention

To address CVE-2023-48307, users are advised to take immediate steps, adopt long-term security practices, and apply necessary patches.

Immediate Steps to Take

Users should consider disabling the Mail app or applying the recommended patches to mitigate the risk of SSRF attacks.

Long-Term Security Practices

Implementing network segmentation, conducting regular security audits, and monitoring server logs can enhance the overall security posture and prevent similar vulnerabilities.

Patching and Updates

Nextcloud Mail app users should update to versions 2.2.8 and 3.3.0, where patches for CVE-2023-48307 have been implemented.