CVE-2021-27141 Explained : Impact and Mitigation

This CVE-2021-27141 article provides an in-depth analysis of a security issue affecting FiberHome HG6245D devices through RP2613. It discusses the vulnerability, its impact, technical details, and mitigation strategies.

Understanding CVE-2021-27141

This section delves into the specifics of CVE-2021-27141, outlining the key details that users need to be aware of.

What is CVE-2021-27141?

CVE-2021-27141 identifies a critical security flaw in FiberHome HG6245D devices running RP2613. It involves the obfuscation of credentials stored in /fhconf/umconfig.txt using the XOR encryption technique with a hardcoded key.

The Impact of CVE-2021-27141

The impact of this vulnerability can lead to unauthorized access to sensitive information stored on the affected devices, potentially compromising data confidentiality and integrity.

Technical Details of CVE-2021-27141

This section provides a detailed overview of the technical aspects of CVE-2021-27141.

Vulnerability Description

The vulnerability allows threat actors to decrypt obfuscated credentials stored in /fhconf/umconfig.txt by leveraging the hardcoded XOR key present in the system.

Affected Systems and Versions

FiberHome HG6245D devices running RP2613 are affected by this vulnerability, exposing them to potential exploitation.

Exploitation Mechanism

The exploitation of CVE-2021-27141 involves utilizing the XOR encryption key to reveal the concealed credentials, granting unauthorized access to the device.

Mitigation and Prevention

This section outlines the necessary steps and best practices to mitigate the risks posed by CVE-2021-27141.

Immediate Steps to Take

Users are advised to update their devices with security patches provided by FiberHome to address the vulnerability. It is crucial to change default credentials and implement network segmentation.

Long-Term Security Practices

To enhance long-term security, organizations should conduct regular security assessments, train employees on best security practices, and monitor network traffic for any suspicious activity.

Patching and Updates

Regularly applying security updates and patches released by FiberHome is essential to ensure protection against vulnerabilities like CVE-2021-27141.