CVE-2019-1003021 Explained : Impact and Mitigation
Learn about CVE-2019-1003021, a security flaw in Jenkins OpenId Connect Authentication Plugin versions 1.4 and earlier. Find out the impact, technical details, and mitigation steps.
A security flaw in versions 1.4 and earlier of the Jenkins OpenId Connect Authentication Plugin allows attackers to exploit vulnerabilities, potentially compromising sensitive information.
Understanding CVE-2019-1003021
This CVE identifies a security vulnerability in the Jenkins OpenId Connect Authentication Plugin that could be exploited by attackers with access to a Jenkins administrator's web browser output.
What is CVE-2019-1003021?
This CVE pertains to a vulnerability in versions 1.4 and earlier of the Jenkins OpenId Connect Authentication Plugin, enabling attackers to retrieve configured client secrets by controlling the administrator's web browser.
The Impact of CVE-2019-1003021
The vulnerability poses a risk of exposing sensitive information to unauthorized parties, potentially leading to unauthorized access and data breaches.
Technical Details of CVE-2019-1003021
The technical aspects of this CVE are as follows:
Vulnerability Description
The vulnerability exists in the OicSecurityRealm/config.jelly of the Jenkins OpenId Connect Authentication Plugin, allowing attackers to retrieve client secrets.
Affected Systems and Versions
- Product: Jenkins OpenId Connect Authentication Plugin
- Vendor: Jenkins project
- Versions Affected: 1.4 and earlier
Exploitation Mechanism
Attackers can exploit this vulnerability by gaining access to a Jenkins administrator's web browser output or controlling the browser, for example, through a malicious extension.
Mitigation and Prevention
To address CVE-2019-1003021, consider the following mitigation strategies:
Immediate Steps to Take
- Upgrade the Jenkins OpenId Connect Authentication Plugin to a non-vulnerable version.
- Monitor and restrict access to Jenkins administrator privileges.
Long-Term Security Practices
- Regularly review and update security configurations for Jenkins and its plugins.
- Educate users on safe browsing practices and the risks of browser extensions.
Patching and Updates
- Stay informed about security advisories and updates from Jenkins project.
- Apply patches promptly to address known vulnerabilities and enhance system security.