CVE-2021-27170 : What You Need to Know

An issue was discovered on FiberHome HG6245D devices through RP2613, where there are no firewall rules for IPv6 connectivity by default, exposing internal management interfaces to the Internet.

Understanding CVE-2021-27170

This CVE identifies a vulnerability in FiberHome HG6245D devices that can potentially expose internal management interfaces to the Internet due to the lack of firewall rules for IPv6 connectivity.

What is CVE-2021-27170?

CVE-2021-27170 highlights a security flaw in FiberHome HG6245D devices that allows external access to internal management interfaces via IPv6.

The Impact of CVE-2021-27170

The vulnerability in this device configuration can lead to unauthorized access to critical system components, posing a significant security risk for users and organizations.

Technical Details of CVE-2021-27170

This section provides more in-depth technical insights into the specific aspects of the CVE.

Vulnerability Description

The issue arises from the absence of firewall rules for IPv6 connectivity, leaving internal management interfaces exposed and vulnerable to external threats.

Affected Systems and Versions

FiberHome HG6245D devices running RP2613 are confirmed to be affected by this vulnerability, potentially impacting users of these specific device configurations.

Exploitation Mechanism

Attackers can exploit this vulnerability by leveraging the lack of proper firewall configurations for IPv6 traffic to gain unauthorized access to the internal management interfaces of the affected devices.

Mitigation and Prevention

To address and prevent the CVE-2021-27170 vulnerability, certain immediate and long-term security measures should be implemented.

Immediate Steps to Take

Users should implement strict firewall rules for IPv6 connectivity on FiberHome HG6245D devices to restrict unauthorized access to internal management interfaces.

Long-Term Security Practices

Regular security audits, firmware updates, and network monitoring are essential for maintaining the integrity and security of network devices to prevent similar vulnerabilities in the future.

Patching and Updates

It is crucial to stay informed about security patches and updates released by FiberHome for the affected devices to address known vulnerabilities and enhance overall system security.