CVE-2021-27156 Explained : Impact and Mitigation

An issue was discovered on FiberHome HG6245D devices through RP2613 where the web daemon contains credentials for an ISP that equal the last part of the MAC address of the br0 interface.

Understanding CVE-2021-27156

This CVE identifies a vulnerability in FiberHome HG6245D devices through RP2613.

What is CVE-2021-27156?

CVE-2021-27156 highlights a security issue where the web daemon on FiberHome HG6245D devices stores ISP credentials that match the last part of the MAC address of the br0 interface.

The Impact of CVE-2021-27156

This vulnerability could potentially allow an attacker to access sensitive ISP credentials, leading to unauthorized access to the device and potential data breaches.

Technical Details of CVE-2021-27156

This section covers the specific technical aspects of the CVE.

Vulnerability Description

The vulnerability in FiberHome HG6245D devices exposes hardcoded ISP credentials based on the MAC address of the br0 interface.

Affected Systems and Versions

All FiberHome HG6245D devices through RP2613 are affected by this vulnerability.

Exploitation Mechanism

By leveraging the hardcoded ISP credentials derived from the MAC address, an attacker can potentially gain unauthorized access to the device.

Mitigation and Prevention

Discover the steps to mitigate and prevent exploitation of this vulnerability.

Immediate Steps to Take

Immediately change the default credentials and review access controls on the affected devices.

Long-Term Security Practices

Implement regular security audits, firmware updates, and strong password policies to enhance the overall security posture.

Patching and Updates

Ensure that the latest firmware updates provided by FiberHome address this vulnerability and apply them promptly to affected devices.