CVE-2021-21646 Explained : Impact and Mitigation
Learn about CVE-2021-21646, a vulnerability in Jenkins Templating Engine Plugin 2.1 and earlier that allows arbitrary code execution. Find out the impact and mitigation steps.
A detailed overview of CVE-2021-21646, a vulnerability in Jenkins Templating Engine Plugin.
Understanding CVE-2021-21646
This section provides insight into the impact and technical details of the CVE.
What is CVE-2021-21646?
Jenkins Templating Engine Plugin version 2.1 and earlier are vulnerable to arbitrary code execution due to inadequate protection of pipeline configurations.
The Impact of CVE-2021-21646
The vulnerability allows attackers with specific permissions to execute malicious code within the Jenkins controller JVM.
Technical Details of CVE-2021-21646
Explore the specifics of the vulnerability to better understand its implications.
Vulnerability Description
Jenkins Templating Engine Plugin versions <= 2.1 lack proper protection of pipeline configurations, enabling attackers to execute code within the Jenkins controller JVM.
Affected Systems and Versions
The vulnerable versions include Jenkins Templating Engine Plugin <= 2.1.
Exploitation Mechanism
Attackers with Job/Configure permissions can leverage the vulnerability to run arbitrary code within the Jenkins controller JVM.
Mitigation and Prevention
Discover the steps to mitigate the risk and prevent exploitation of CVE-2021-21646.
Immediate Steps to Take
Administrators should upgrade Jenkins Templating Engine Plugin to a secure version and review user permissions to prevent unauthorized access.
Long-Term Security Practices
Regularly monitor security advisories and apply patches promptly to protect against known vulnerabilities.
Patching and Updates
Stay informed about Jenkins security updates and apply relevant patches to secure the environment.