CVE-2021-36767 : Vulnerability Insights and Analysis

In Digi RealPort through 4.10.490, a vulnerability exists where authentication relies on a challenge-response mechanism that exposes the server password hash, enabling attackers to crack it offline and gain unauthorized access.

Understanding CVE-2021-36767

This section provides insight into the nature and implications of the CVE-2021-36767 vulnerability.

What is CVE-2021-36767?

The vulnerability in Digi RealPort through version 4.10.490 allows attackers to exploit a weak authentication mechanism to obtain and crack the server password hash for unauthorized access.

The Impact of CVE-2021-36767

The vulnerability poses a significant security risk as it enables attackers to bypass authentication controls and potentially gain unauthorized access to the server, compromising sensitive data and system integrity.

Technical Details of CVE-2021-36767

This section delves deeper into the technical aspects of the CVE-2021-36767 vulnerability.

Vulnerability Description

Authentication in Digi RealPort through 4.10.490 relies on a flawed challenge-response mechanism that exposes a weakly-hashed version of the server's access password, allowing attackers to crack it offline and potentially login to the server.

Affected Systems and Versions

The vulnerability impacts all versions of Digi RealPort up to and including 4.10.490, where authentication weaknesses are present, making them susceptible to exploitation.

Exploitation Mechanism

An attacker can send an unauthenticated request to the server, prompting the server to respond with a weakly-hashed version of the server's access password, which can then be cracked offline to gain unauthorized access.

Mitigation and Prevention

This section outlines steps to mitigate and prevent the exploitation of CVE-2021-36767.

Immediate Steps to Take

Users are advised to update to a patched version of Digi RealPort that addresses the authentication vulnerability and strengthens security controls.

Long-Term Security Practices

Implementing strong authentication mechanisms, regularly updating software, and monitoring server access can enhance overall security posture and prevent unauthorized access.

Patching and Updates

Regularly applying security patches and updates provided by the vendor is crucial to address known vulnerabilities and ensure the security of systems and data.