CVE-2021-33183 : Security Advisory and Response

A Path Traversal vulnerability was discovered in Synology Docker before version 18.09.0-0515, allowing local users to read or write arbitrary files. This CVE was made public on May 26, 2021, with a CVSS base score of 7.9.

Understanding CVE-2021-33183

This section delves into the details of the CVE-2021-33183 vulnerability in Synology Docker.

What is CVE-2021-33183?

The CVE-2021-33183 CVE ID is associated with a 'Path Traversal' vulnerability in the container volume management component of Synology Docker. It permits local users to manipulate files in an unrestricted manner.

The Impact of CVE-2021-33183

The impact of CVE-2021-33183 is rated as 'HIGH' in terms of confidentiality and integrity. Local users can exploit this vulnerability to access sensitive data and modify critical files.

Technical Details of CVE-2021-33183

In this section, we explore the technical aspects of CVE-2021-33183.

Vulnerability Description

The vulnerability arises from the improper limitation of a pathname to a restricted directory, resulting in a 'Path Traversal' flaw in Synology Docker.

Affected Systems and Versions

Synology Docker versions before 18.09.0-0515 are impacted by this vulnerability, allowing potential exploitation by local users.

Exploitation Mechanism

The vulnerability enables local users to read or write arbitrary files through unspecified vectors, bypassing directory restrictions.

Mitigation and Prevention

Discover how to mitigate the risks associated with CVE-2021-33183 in this section.

Immediate Steps to Take

To mitigate the CVE-2021-33183 vulnerability, users should update Synology Docker to version 18.09.0-0515 or above immediately.

Long-Term Security Practices

Implement robust access controls and regularly monitor file permissions to prevent unauthorized file manipulation.

Patching and Updates

Stay informed about security updates from Synology and promptly apply patches to ensure protection against known vulnerabilities.