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CVE-2021-21665 : What You Need to Know

Learn about CVE-2021-21665, a CSRF vulnerability in Jenkins XebiaLabs XL Deploy Plugin versions <= 10.0.1. Understand the impact, technical details, and mitigation strategies.

A detailed overview of CVE-2021-21665, a cross-site request forgery (CSRF) vulnerability in Jenkins XebiaLabs XL Deploy Plugin.

Understanding CVE-2021-21665

This section covers the description, impact, technical details, and mitigation strategies related to CVE-2021-21665.

What is CVE-2021-21665?

CVE-2021-21665 is a CSRF vulnerability in Jenkins XebiaLabs XL Deploy Plugin versions less than or equal to 10.0.1. Attackers can exploit this flaw to connect to a specified URL using credentials IDs, potentially compromising stored credentials.

The Impact of CVE-2021-21665

The vulnerability allows attackers to maliciously connect to a specific URL with unauthorized access, potentially capturing sensitive username/password credentials stored in Jenkins.

Technical Details of CVE-2021-21665

Detailed technical information on the vulnerability, affected systems, and exploitation method.

Vulnerability Description

A CSRF flaw in Jenkins XebiaLabs XL Deploy Plugin enables attackers to connect to a specified URL using obtained credentials, leading to unauthorized access and potential data theft.

Affected Systems and Versions

The vulnerability affects Jenkins XebiaLabs XL Deploy Plugin versions less than or equal to 10.0.1.

Exploitation Mechanism

Attackers can exploit the CSRF vulnerability by using credentials IDs to connect to a specific URL, compromising Jenkins-stored credentials.

Mitigation and Prevention

Actions to mitigate the risk posed by CVE-2021-21665 and prevent further exploitation.

Immediate Steps to Take

        Update Jenkins XebiaLabs XL Deploy Plugin to version 10.0.1 or higher to eliminate the CSRF vulnerability.
        Monitor user activities within Jenkins and validate credentials frequently.

Long-Term Security Practices

        Conduct regular security audits and assessments of Jenkins plugins to detect vulnerabilities promptly.
        Educate users about secure credential management and the risks of CSRF attacks.

Patching and Updates

Stay informed about security updates from Jenkins and apply patches promptly to ensure the latest security measures are in place.

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