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CVE-2021-21644 : Exploit Details and Defense Strategies

Learn about CVE-2021-21644, a CSRF vulnerability in Jenkins Config File Provider Plugin 3.7.0 and earlier that allows attackers to delete configuration files. Find mitigation steps here.

A vulnerability has been identified in Jenkins Config File Provider Plugin version 3.7.0 and earlier, allowing attackers to perform a cross-site request forgery (CSRF) attack to delete configuration files associated with a specified ID.

Understanding CVE-2021-21644

This CVE pertains to a CSRF vulnerability found in Jenkins Config File Provider Plugin version 3.7.0 and earlier.

What is CVE-2021-21644?

The vulnerability in Jenkins Config File Provider Plugin version 3.7.0 and earlier enables malicious attackers to delete configuration files linked to a supplied ID through a CSRF attack.

The Impact of CVE-2021-21644

If exploited, this vulnerability could result in unauthorized deletion of critical configuration files, leading to service disruption and potential data loss.

Technical Details of CVE-2021-21644

This section outlines the specifics of the vulnerability.

Vulnerability Description

The flaw in Jenkins Config File Provider Plugin version 3.7.0 and earlier allows attackers to delete configuration files based on a user-defined ID using CSRF techniques.

Affected Systems and Versions

        Affected Product: Jenkins Config File Provider Plugin
        Vendor: Jenkins project
        Vulnerable Versions: Up to and including 3.7.0

Exploitation Mechanism

Attackers can exploit this vulnerability by tricking authenticated users into visiting a malicious website or clicking on a specially crafted link, leading to the unauthorized deletion of configuration files.

Mitigation and Prevention

Protect your systems and data from potential exploitation of CVE-2021-21644 through the following measures:

Immediate Steps to Take

        Upgrade Jenkins Config File Provider Plugin to a patched version beyond 3.7.0 to mitigate the vulnerability.
        Regularly monitor and review configuration files for unexpected changes.

Long-Term Security Practices

        Implement CSRF protection mechanisms in Jenkins and other web applications to prevent such attacks.
        Educate users about the risks of clicking on unknown links or visiting suspicious websites.

Patching and Updates

Stay informed about security updates and patches released by Jenkins project for the Config File Provider Plugin to address this vulnerability.

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