CVE-2020-2239 : Exploit Details and Defense Strategies
Learn about CVE-2020-2239 affecting Jenkins Parameterized Remote Trigger Plugin versions <= 3.1.3. Find out the impact, technical details, and mitigation steps for this security vulnerability.
Jenkins Parameterized Remote Trigger Plugin 3.1.3 and earlier versions store a secret unencrypted in its global configuration file, potentially exposing it to attackers with access to the Jenkins controller file system.
Understanding CVE-2020-2239
This CVE involves a vulnerability in the Jenkins Parameterized Remote Trigger Plugin that could lead to unauthorized access to sensitive information.
What is CVE-2020-2239?
This CVE refers to the issue where the Jenkins Parameterized Remote Trigger Plugin up to version 3.1.3 stores a secret in an unencrypted manner, making it accessible to malicious actors with Jenkins controller file system access.
The Impact of CVE-2020-2239
The vulnerability could result in unauthorized disclosure of sensitive information, potentially leading to further security breaches and unauthorized access to Jenkins resources.
Technical Details of CVE-2020-2239
The technical aspects of the vulnerability are as follows:
Vulnerability Description
The Jenkins Parameterized Remote Trigger Plugin 3.1.3 and earlier versions store a secret unencrypted in the global configuration file on the Jenkins controller, allowing attackers with file system access to view it.
Affected Systems and Versions
- Product: Jenkins Parameterized Remote Trigger Plugin
- Vendor: Jenkins project
- Versions Affected: <= 3.1.3
- Version Type: Custom
Exploitation Mechanism
Attackers with access to the Jenkins controller file system can exploit this vulnerability to retrieve the unencrypted secret stored in the global configuration file.
Mitigation and Prevention
To address CVE-2020-2239, consider the following mitigation strategies:
Immediate Steps to Take
- Upgrade the Jenkins Parameterized Remote Trigger Plugin to a version beyond 3.1.3.
- Implement access controls to restrict unauthorized access to the Jenkins controller file system.
Long-Term Security Practices
- Regularly review and update security configurations for Jenkins and its plugins.
- Educate users on secure credential management practices to prevent similar incidents.
Patching and Updates
- Stay informed about security advisories and updates from Jenkins to promptly apply patches addressing known vulnerabilities.