CVE-2021-3310 : What You Need to Know

A vulnerability in Western Digital My Cloud OS 5 devices before version 5.10.122 could allow attackers to execute malicious code and access sensitive information.

Understanding CVE-2021-3310

This CVE describes how Western Digital My Cloud OS 5 devices are vulnerable to Symbolic Link Following on SMB and AFP shares, leading to potential code execution and information disclosure.

What is CVE-2021-3310?

The vulnerability in My Cloud OS 5 devices allows attackers to exploit symbolic links on SMB and AFP shares, resulting in unauthorized code execution and disclosure of local files.

The Impact of CVE-2021-3310

If exploited, this vulnerability could lead to severe consequences, including unauthorized access to sensitive data and the ability to execute malicious code on affected devices.

Technical Details of CVE-2021-3310

This section outlines the specific technical aspects of the CVE.

Vulnerability Description

The issue arises due to how My Cloud OS 5 devices handle Symbolic Link Following, enabling threat actors to manipulate links and execute arbitrary code, potentially compromising the device.

Affected Systems and Versions

Western Digital My Cloud OS 5 devices prior to version 5.10.122 are impacted by this vulnerability, exposing them to the risk of exploitation.

Exploitation Mechanism

Attackers can exploit this vulnerability by leveraging Symbolic Link Following on SMB and AFP shares to execute harmful code and access confidential information.

Mitigation and Prevention

Protecting systems from CVE-2021-3310 involves taking immediate action and implementing long-term security practices.

Immediate Steps to Take

Users should promptly update their My Cloud OS 5 devices to version 5.10.122 to mitigate the risk of exploitation. Additionally, restricting network access and disabling unnecessary services can enhance security.

Long-Term Security Practices

To enhance overall security posture, users are advised to regularly monitor for firmware updates, apply security patches promptly, implement network segmentation, and conduct routine security assessments.

Patching and Updates

Regularly checking for security updates from Western Digital, promptly applying patches, and ensuring devices are running the latest firmware version is crucial in preventing exploitation of this vulnerability.