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CVE-2021-21661 Explained : Impact and Mitigation

Understand CVE-2021-21661 affecting Jenkins Kubernetes CLI Plugin 1.10.0 and earlier. Learn about the impact, technical details, affected systems, and mitigation steps.

A detailed overview of CVE-2021-21661, a vulnerability in Jenkins Kubernetes CLI Plugin.

Understanding CVE-2021-21661

This section provides insights into the nature and impact of the vulnerability.

What is CVE-2021-21661?

CVE-2021-21661 refers to a security flaw in Jenkins Kubernetes CLI Plugin version 1.10.0 and earlier. The plugin fails to perform permission checks in several HTTP endpoints, allowing attackers with Overall/Read permission to enumerate credential IDs stored in Jenkins.

The Impact of CVE-2021-21661

The vulnerability enables unauthorized users to access sensitive credential information in Jenkins, potentially leading to unauthorized disclosure or manipulation of confidential data.

Technical Details of CVE-2021-21661

Explore specific technical aspects of the CVE-2021-21661 vulnerability.

Vulnerability Description

Jenkins Kubernetes CLI Plugin 1.10.0 and earlier lack proper permission validation in various HTTP endpoints, making it susceptible to credential enumeration attacks.

Affected Systems and Versions

The Jenkins Kubernetes CLI Plugin versions equal to or less than 1.10.0 are affected by this security issue.

Exploitation Mechanism

Attackers with Overall/Read permissions can exploit this vulnerability to retrieve credential IDs of stored credentials within Jenkins.

Mitigation and Prevention

Learn how to address and prevent CVE-2021-21661 from causing harm.

Immediate Steps to Take

Users are advised to update Jenkins Kubernetes CLI Plugin to a non-vulnerable version and review access controls to limit exposure.

Long-Term Security Practices

Adopt a least privilege model, regularly review and rotate credentials, and conduct security training to enhance overall security posture.

Patching and Updates

Stay vigilant for security advisories, apply patches promptly, and keep all software components up-to-date to prevent exploitation.

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