CVE-2021-21650 : What You Need to Know

A detailed overview of CVE-2021-21650, a vulnerability in the Jenkins S3 publisher Plugin that could allow attackers to access sensitive information.

Understanding CVE-2021-21650

This section dives into the impact, technical details, and mitigation strategies related to the CVE.

What is CVE-2021-21650?

CVE-2021-21650 is a security vulnerability in the Jenkins S3 publisher Plugin version 0.11.6 and earlier. Attackers with Item/Read permission can exploit this flaw to access S3 artifacts if the Run/Artifacts permission is enabled.

The Impact of CVE-2021-21650

The vulnerability allows unauthorized users to retrieve information about artifacts uploaded to S3, compromising data confidentiality.

Technical Details of CVE-2021-21650

This section provides detailed technical insights into the vulnerability.

Vulnerability Description

Jenkins S3 publisher Plugin 0.11.6 and earlier lack proper permission checks, enabling attackers with Item/Read permission to access S3 artifact details.

Affected Systems and Versions

The issue impacts Jenkins S3 publisher Plugin versions up to 0.11.6, rendering them susceptible to unauthorized data access.

Exploitation Mechanism

Attackers exploit the missing permission checks in HTTP endpoints and API models to retrieve sensitive artifacts uploaded to S3.

Mitigation and Prevention

This section outlines steps to secure systems against CVE-2021-21650.

Immediate Steps to Take

Users are advised to disable the Run/Artifacts permission in Jenkins S3 publisher Plugin to prevent unauthorized access.

Long-Term Security Practices

Implement least privilege access controls, regularly monitor for unauthorized activities, and stay updated on security patches.

Patching and Updates

Ensure timely installation of security patches and updates released by Jenkins project to address the vulnerability.