CVE-2021-34811 Explained : Impact and Mitigation

A Server-Side Request Forgery (SSRF) vulnerability was discovered in the task management component of Synology Download Station before version 3.8.16-3566. This vulnerability could allow remote authenticated users to access intranet resources through unspecified vectors.

Understanding CVE-2021-34811

This section will delve into the specifics of the CVE-2021-34811 vulnerability.

What is CVE-2021-34811?

CVE-2021-34811 is a Server-Side Request Forgery (SSRF) vulnerability in Synology Download Station that enables authenticated remote users to access intranet resources using undisclosed methods.

The Impact of CVE-2021-34811

The impact of CVE-2021-34811 is rated as MEDIUM with a CVSS base score of 5.0. This vulnerability has a low attack complexity and requires low privileges.

Technical Details of CVE-2021-34811

In this section, we will explore the technical aspects of CVE-2021-34811.

Vulnerability Description

The SSRF vulnerability in Synology Download Station allows remote authenticated users to exploit task management functions to access intranet resources.

Affected Systems and Versions

Synology Download Station versions earlier than 3.8.16-3566 are affected by CVE-2021-34811.

Exploitation Mechanism

The vulnerability can be exploited by authenticated remote users through unspecified vectors to gain access to internal network resources.

Mitigation and Prevention

Discover how to mitigate and prevent the exploitation of CVE-2021-34811 below.

Immediate Steps to Take

Users should update Synology Download Station to version 3.8.16-3566 or later to mitigate the SSRF vulnerability.

Long-Term Security Practices

Enforce strict security policies and educate users on the risks of SSRF attacks to prevent future vulnerabilities.

Patching and Updates

Regularly apply security patches and updates to ensure that software, such as Synology Download Station, remains secure and protected from potential threats.