CVE-2021-29087 : Vulnerability Insights and Analysis

A Path Traversal vulnerability in the webapi component of Synology DiskStation Manager (DSM) before version 6.2.3-25426-3 allows remote attackers to write arbitrary files. This CVE was made public on June 23, 2021, with a CVSS score of 7.5 (High Severity).

Understanding CVE-2021-29087

This section will cover the essential details about the CVE-2021-29087 vulnerability in Synology DiskStation Manager (DSM).

What is CVE-2021-29087?

The CVE-2021-29087 is a Path Traversal vulnerability found in the webapi component of Synology DiskStation Manager (DSM) before version 6.2.3-25426-3. It enables remote attackers to write arbitrary files through unspecified vectors.

The Impact of CVE-2021-29087

With a CVSS base score of 7.5, this vulnerability has a high severity level. Attackers can exploit this flaw to manipulate files and compromise the integrity of the system.

Technical Details of CVE-2021-29087

Let's delve deeper into the technical aspects of CVE-2021-29087 to understand its implications.

Vulnerability Description

The vulnerability arises due to improper limitation of a pathname to a restricted directory, leading to Path Traversal in Synology DSM's webapi component.

Affected Systems and Versions

Synology DiskStation Manager (DSM) versions before 6.2.3-25426-3 are affected by this vulnerability.

Exploitation Mechanism

Remote attackers can exploit this flaw by manipulating file paths beyond the intended directory boundaries, ultimately allowing them to write arbitrary files.

Mitigation and Prevention

To safeguard systems from CVE-2021-29087, immediate actions and long-term security practices need to be implemented.

Immediate Steps to Take

Update Synology DSM to version 6.2.3-25426-3 or later to patch the vulnerability.
Monitor network traffic for any suspicious activities indicating exploitation attempts.

Long-Term Security Practices

Implement strict file system access controls to prevent unauthorized write operations.
Regularly audit and review file system permissions to ensure security best practices.

Patching and Updates

Regularly check for security updates and patches released by Synology to address known vulnerabilities such as CVE-2021-29087.