CVE-2021-40339 : Exploit Details and Defense Strategies

This CVE article provides details about a configuration vulnerability in Hitachi Energy LinkOne application and its impacts, technical details, and mitigation steps.

Understanding CVE-2021-40339

This section delves into the specifics of the CVE-2021-40339 vulnerability affecting Hitachi Energy's LinkOne product.

What is CVE-2021-40339?

A configuration vulnerability in Hitachi Energy LinkOne allows attackers to retrieve sensitive information due to the lack of HTTP Headers. The affected versions include LinkOne 3.20 to 3.26.

The Impact of CVE-2021-40339

The vulnerability has a CVSS v3.1 base score of 3.7 (Low), with confidentiality impact rated as Low and no integrity impact. The attack complexity is high, exploiting the network without requiring privileges or user interaction.

Technical Details of CVE-2021-40339

This section covers the technical aspects of the CVE-2021-40339 vulnerability.

Vulnerability Description

The vulnerability stems from the absence of HTTP Headers in Hitachi Energy LinkOne, enabling attackers to access sensitive data.

Affected Systems and Versions

Hitachi Energy LinkOne 3.20
Hitachi Energy LinkOne 3.22
Hitachi Energy LinkOne 3.23
Hitachi Energy LinkOne 3.24
Hitachi Energy LinkOne 3.25
Hitachi Energy LinkOne 3.26

Exploitation Mechanism

The attacker can exploit this vulnerability over the network without needing any user interaction or privileges.

Mitigation and Prevention

Insights into handling and preventing the CVE-2021-40339 vulnerability.

Immediate Steps to Take

Apply security patch or update to Hitachi Energy LinkOne version 3.27.

Long-Term Security Practices

Regularly update software and systems.
Implement robust access controls.
Conduct security awareness training for employees.

Patching and Updates

Ensuring software and systems are consistently updated helps safeguard against known vulnerabilities.