CVE-2021-21651 Explained : Impact and Mitigation

This CVE article provides insights into CVE-2021-21651, a vulnerability in Jenkins S3 publisher Plugin that could potentially allow attackers to view configured profiles without proper authorization.

Understanding CVE-2021-21651

This section delves into the details of the vulnerability, its impact, technical aspects, and mitigation strategies.

What is CVE-2021-21651?

CVE-2021-21651 is a security flaw in Jenkins S3 publisher Plugin versions 0.11.6 and earlier. It enables malicious actors with Overall/Read permissions to access a list of configured profiles through an unprotected HTTP endpoint.

The Impact of CVE-2021-21651

The vulnerability poses a significant risk as unauthorized users can retrieve sensitive information without proper authorization, potentially leading to data breaches or unauthorized access.

Technical Details of CVE-2021-21651

This section highlights specific technical aspects of the CVE.

Vulnerability Description

Jenkins S3 publisher Plugin 0.11.6 and prior lack proper permission checks in an HTTP endpoint, providing a loophole for users with Overall/Read permission to extract profile lists.

Affected Systems and Versions

The affected product is Jenkins S3 publisher Plugin by Jenkins project, specifically versions less than or equal to 0.11.6. Version 0.11.5.1 is not vulnerable to this issue.

Exploitation Mechanism

Attackers exploit the missing permission verification in the HTTP endpoint to retrieve the list of profiles, compromising sensitive data.

Mitigation and Prevention

To safeguard systems from CVE-2021-21651, immediate and long-term security measures are crucial.

Immediate Steps to Take

Organizations using affected versions should restrict Overall/Read permissions and monitor access to sensitive data.

Long-Term Security Practices

Implement strict access controls, conduct regular security audits, and educate users on secure configuration practices to prevent unauthorized data access.

Patching and Updates

Users should update Jenkins S3 publisher Plugin to version 0.11.6.1 or later, where this vulnerability is resolved.