CVE-2021-30127 : Vulnerability Insights and Analysis

TerraMaster F2-210 devices through 2021-04-03 expose the admin web server over the Internet via UPnP on TCP port 8181. This raises security concerns due to the inconsistency with the official documentation.

Understanding CVE-2021-30127

This CVE highlights a vulnerability in TerraMaster F2-210 devices that allow the admin web server to be accessed over the Internet through UPnP on an unexpected port.

What is CVE-2021-30127?

CVE-2021-30127 discloses a security issue in TerraMaster F2-210 devices where the admin web server is made accessible over the Internet via UPnP on TCP port 8181, contrary to the local network-only guidelines.

The Impact of CVE-2021-30127

The exposure of the admin web server to the Internet poses a significant security risk as it goes against the intended local network access, potentially leading to unauthorized access and exploitation of the device.

Technical Details of CVE-2021-30127

This section delves into the technical aspects of the vulnerability.

Vulnerability Description

TerraMaster F2-210 devices have a configuration issue that utilizes UPnP to expose the admin web server over the Internet on TCP port 8181, deviating from the specified local network accessibility.

Affected Systems and Versions

The CVE affects TerraMaster F2-210 devices through 2021-04-03, which have UPnP misconfigurations allowing remote access to the admin web server.

Exploitation Mechanism

Attackers can exploit this vulnerability by leveraging the exposed admin web server accessible via UPnP on TCP port 8181 to gain unauthorized access to the device.

Mitigation and Prevention

To address CVE-2021-30127 and enhance security, immediate steps and long-term practices need to be implemented.

Immediate Steps to Take

Owners of TerraMaster F2-210 devices should promptly restrict access to the admin web server, disable UPnP, and ensure network firewall rules prevent external access to port 8181.

Long-Term Security Practices

Implementing regular security audits, keeping devices up to date, and following security best practices can mitigate similar vulnerabilities and enhance overall security posture.

Patching and Updates

Vendor-supplied patches or firmware updates should be applied promptly to remediate the vulnerability and strengthen the security of TerraMaster F2-210 devices.