CVE-2021-21693 : Security Advisory and Response

A detailed overview of CVE-2021-21693 highlighting its impact, technical details, and mitigation strategies.

Understanding CVE-2021-21693

This section provides insights into the vulnerability identified as CVE-2021-21693 in Jenkins.

What is CVE-2021-21693?

The vulnerability in Jenkins versions 2.318 and earlier, LTS 2.303.2 and earlier, allows agent-to-controller access to create temporary files without proper pre-creation checks.

The Impact of CVE-2021-21693

The lack of pre-creation checks in Jenkins versions may lead to unauthorized agent-to-controller access and potential security breaches.

Technical Details of CVE-2021-21693

Explore the specific technical aspects associated with CVE-2021-21693.

Vulnerability Description

In Jenkins, the vulnerability allows unauthorized file creation by agents without appropriate access checks.

Affected Systems and Versions

Jenkins versions 2.318 and earlier, LTS 2.303.2 and earlier, are affected by this security flaw.

Exploitation Mechanism

Attackers can exploit this vulnerability by gaining agent-to-controller access and creating unauthorized temporary files.

Mitigation and Prevention

Discover the measures to mitigate the risks posed by CVE-2021-21693 and prevent potential security incidents.

Immediate Steps to Take

Organizations should update Jenkins to versions beyond 2.318 and LTS 2.303.2 to eliminate the vulnerability.

Long-Term Security Practices

Implement strict file access controls, regular security assessments, and employee training to enhance overall security posture.

Patching and Updates

Regularly monitor Jenkins security advisories and apply patches promptly to address known vulnerabilities.