CVE-2022-21659 : Exploit Details and Defense Strategies

Flask-AppBuilder is an application development framework based on Flask web framework. The vulnerability in affected versions allows non-authenticated users to enumerate accounts by timing server response during login. Upgrading to version 3.4.4 is recommended.

Understanding CVE-2022-21659

This CVE involves an observable response discrepancy in Flask-AppBuilder, potentially exposing user enumeration vulnerability.

What is CVE-2022-21659?

Flask-AppBuilder, in certain versions, allows unauthorized users to enumerate existing accounts through response timing during login attempts.

The Impact of CVE-2022-21659

The vulnerability poses a medium severity risk with a CVSS base score of 5.3, affecting confidentiality to a low extent while requiring no privileges.

Technical Details of CVE-2022-21659

The following technical aspects are essential to understand regarding CVE-2022-21659.

Vulnerability Description

The vulnerability in Flask-AppBuilder enables non-authenticated users to identify existing accounts by exploiting response time differences during login attempts.

Affected Systems and Versions

All versions of Flask-AppBuilder prior to 3.4.4 are impacted by this vulnerability.

Exploitation Mechanism

Unauthorized users can leverage varying server response times during login to enumerate user accounts without authentication.

Mitigation and Prevention

To address and prevent CVE-2022-21659, the following steps are crucial.

Immediate Steps to Take

Upgrade Flask-AppBuilder to version 3.4.4 immediately to mitigate the user enumeration vulnerability.

Long-Term Security Practices

Enhance security practices by emphasizing timely updates, security assessments, and user authentication mechanisms.

Patching and Updates

Regularly monitor and apply software patches and updates to ensure the security of Flask-AppBuilder.