CVE-2021-27165 : What You Need to Know

This article provides details about CVE-2021-27165, a vulnerability found in FiberHome HG6245D devices.

Understanding CVE-2021-27165

This section discusses the impact and technical details of the CVE-2021-27165 vulnerability.

What is CVE-2021-27165?

CVE-2021-27165 is a security issue discovered in FiberHome HG6245D devices through RP2613. It allows unauthorized access to the telnet daemon on port 23/tcp using the gpon/gpon default credentials.

The Impact of CVE-2021-27165

The vulnerability enables attackers to potentially exploit the telnet service, leading to unauthorized access and control of affected devices.

Technical Details of CVE-2021-27165

This section covers the specific technical aspects of the CVE-2021-27165 vulnerability.

Vulnerability Description

The flaw in FiberHome HG6245D devices allows malicious actors to abuse the telnet service using hardcoded credentials, posing a security risk.

Affected Systems and Versions

FiberHome HG6245D devices through RP2613 are affected by this vulnerability, highlighting the importance of timely mitigation measures.

Exploitation Mechanism

By leveraging the gpon/gpon credentials, threat actors can exploit the telnet daemon on port 23/tcp to compromise vulnerable devices.

Mitigation and Prevention

This section outlines steps to mitigate the CVE-2021-27165 vulnerability and enhance overall system security.

Immediate Steps to Take

Users are advised to restrict access to the telnet service, change default credentials, or disable telnet if not required to prevent unauthorized access.

Long-Term Security Practices

Implementing network segmentation, regular security audits, and keeping systems up to date can help in preventing similar security incidents in the future.

Patching and Updates

Vendor-provided patches or firmware updates should be applied promptly to address the vulnerability and enhance the security posture of affected devices.