CVE-2021-4259 : Exploit Details and Defense Strategies

A vulnerability was found in phpRedisAdmin up to version 1.16.1 with identifier VDB-216267. The issue exists in the authHttpDigest function of the file includes/login.inc.php due to the use of the wrong operator in string comparison. Upgrading to version 1.16.2, with the associated patch 31aa7661e6db6f4dffbf9a635817832a0a11c7d9, can address this problem effectively.

Understanding CVE-2021-4259

This section delves deeper into the details of the CVE-2021-4259 vulnerability.

What is CVE-2021-4259?

CVE-2021-4259 is a vulnerability in phpRedisAdmin up to version 1.16.1, identified as VDB-216267. It arises from the incorrect use of the operator in string comparison within the authHttpDigest function.

The Impact of CVE-2021-4259

The vulnerability allows attackers to manipulate the argument response, leading to the exploitation of the wrong operator in string comparison, potentially resulting in unauthorized actions.

Technical Details of CVE-2021-4259

Explore the technical specifics of the CVE-2021-4259 vulnerability.

Vulnerability Description

The flaw is present in phpRedisAdmin versions up to 1.16.1, impacting the authHttpDigest function in login.inc.php due to improper string comparison.

Affected Systems and Versions

The vulnerability affects phpRedisAdmin versions 1.16.0 and 1.16.1.

Exploitation Mechanism

By manipulating the response argument with unknown data, threat actors can exploit the vulnerability via the use of the wrong operator in string comparison.

Mitigation and Prevention

Learn how to mitigate the risks associated with CVE-2021-4259.

Immediate Steps to Take

Upgrade affected systems to phpRedisAdmin version 1.16.2, which contains the necessary fixes to address the vulnerability.

Long-Term Security Practices

Ensure regular updates and monitoring of software vulnerabilities to prevent exploitation.

Patching and Updates

Refer to the official patch provided at GitHub for CVE-2021-4259 mitigation.