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CVE-2021-21631 Explained : Impact and Mitigation

Learn about CVE-2021-21631, a vulnerability in Jenkins Cloud Statistics Plugin allowing unauthorized access to provisioning error messages. Explore impact, technical details, and mitigation.

A detailed overview of CVE-2021-21631 focusing on the Jenkins Cloud Statistics Plugin vulnerability.

Understanding CVE-2021-21631

CVE-2021-21631 is a vulnerability in the Jenkins Cloud Statistics Plugin that allows unauthorized users to view provisioning error messages.

What is CVE-2021-21631?

The Jenkins Cloud Statistics Plugin version 0.26 and earlier lack proper permission checks, enabling attackers with specific permissions to access error messages.

The Impact of CVE-2021-21631

This vulnerability poses a risk as attackers can exploit it to gather sensitive information by viewing provisioning exception error messages.

Technical Details of CVE-2021-21631

Exploring the technical aspects of the CVE-2021-21631 vulnerability within the Jenkins Cloud Statistics Plugin.

Vulnerability Description

The issue arises from the plugin's failure to enforce permission checks, allowing users with elevated privileges to access error messages.

Affected Systems and Versions

The vulnerability affects Jenkins Cloud Statistics Plugin version 0.26 and earlier, exposing instances without proper permission controls.

Exploitation Mechanism

Attackers with Overall/Read permissions and knowledge of activity IDs can exploit the HTTP endpoint to view related provisioning exception error messages.

Mitigation and Prevention

Best practices to address and prevent the CVE-2021-21631 vulnerability in the Jenkins Cloud Statistics Plugin.

Immediate Steps to Take

Users should upgrade to a fixed version or apply necessary patches to mitigate the risk of unauthorized access to error messages.

Long-Term Security Practices

Implement strict permission controls, regularly monitor plugin updates, and educate users on secure configurations to enhance overall system security.

Patching and Updates

Stay informed about security advisories, promptly apply patches, and regularly update the Jenkins Cloud Statistics Plugin to prevent exploitation of known vulnerabilities.

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