CVE-2021-27177 : Vulnerability Insights and Analysis

An issue was discovered on FiberHome HG6245D devices through RP2613 that allows authentication bypass by exploiting a specific string value.

Understanding CVE-2021-27177

This CVE describes a vulnerability in FiberHome HG6245D devices that enables unauthorized access to the telnet server by leveraging a particular decoded string value.

What is CVE-2021-27177?

The vulnerability in FiberHome HG6245D devices through RP2613 permits attackers to bypass authentication mechanisms by sending a specific decoded string to the telnet server.

The Impact of CVE-2021-27177

This security flaw could potentially lead to unauthorized access to the affected devices, compromising sensitive information and network security.

Technical Details of CVE-2021-27177

This section outlines the specific technical aspects of the CVE.

Vulnerability Description

The vulnerability allows threat actors to bypass authentication on FiberHome HG6245D devices via the telnet server by using a decoded string value.

Affected Systems and Versions

The issue affects FiberHome HG6245D devices running RP2613.

Exploitation Mechanism

Exploiting this vulnerability involves sending the decoded value of a specific string to the telnet server, enabling unauthorized access.

Mitigation and Prevention

Protecting systems from CVE-2021-27177 involves immediate actions and long-term security practices.

Immediate Steps to Take

Administrators should restrict access to the telnet service, apply vendor-recommended security configurations, and monitor for any signs of unauthorized access.

Long-Term Security Practices

Implementing network segmentation, keeping systems up to date with security patches, and conducting regular security audits are essential to prevent such vulnerabilities.

Patching and Updates

Users should apply patches provided by FiberHome to address the authentication bypass vulnerability on HG6245D devices.