CVE-2021-27231 Explained : Impact and Mitigation

Hestia Control Panel 1.3.5 and below, when operating in a shared-hosting environment, is susceptible to a security issue that allows remote authenticated users to create a subdomain within a different customer's domain, potentially leading to the spoofing of services and email messages.

Understanding CVE-2021-27231

This section delves into the details of the CVE-2021-27231 vulnerability.

What is CVE-2021-27231?

CVE-2021-27231 concerns a vulnerability in Hestia Control Panel 1.3.5 and earlier versions that permits authenticated remote users to create subdomains for other customers' domains, opening avenues for service and email impersonation.

The Impact of CVE-2021-27231

The exploitation of this vulnerability could result in service spoofing and the interception of email communications within a shared-hosting environment.

Technical Details of CVE-2021-27231

This section outlines the technical aspects of the CVE-2021-27231 vulnerability.

Vulnerability Description

The vulnerability in Hestia Control Panel allows authenticated remote users to create subdomains for different customer domains, enabling impersonation of services and email messages.

Affected Systems and Versions

Hestia Control Panel version 1.3.5 and prior versions are affected by this security issue, specifically in shared-hosting setups.

Exploitation Mechanism

By exploiting this vulnerability, remote authenticated users can create subdomains under unrelated customer domains, facilitating the spoofing of services and emails.

Mitigation and Prevention

In this segment, you will find guidance on addressing and preventing CVE-2021-27231.

Immediate Steps to Take

Users are advised to update Hestia Control Panel to a patched version immediately to mitigate this security risk. Additionally, it is recommended to review subdomains for any unauthorized entries.

Long-Term Security Practices

To enhance security, consider applying access controls to prevent unauthorized subdomain creation and routinely monitoring for unusual activity on the control panel.

Patching and Updates

Stay informed about software updates for Hestia Control Panel to ensure that security patches are promptly applied to safeguard against known vulnerabilities.