CVE-2019-16561 Explained : Impact and Mitigation
Learn about CVE-2019-16561 affecting Jenkins WebSphere Deployer Plugin versions <= 1.6.1, allowing SSL/TLS validation bypass. Find mitigation steps and long-term security practices here.
Jenkins WebSphere Deployer Plugin versions 1.6.1 and earlier allow users with Overall/Read access to disable SSL/TLS certificate and hostname validation for the entire Jenkins master JVM.
Understanding CVE-2019-16561
This CVE affects the Jenkins WebSphere Deployer Plugin, potentially exposing the Jenkins master JVM to security risks.
What is CVE-2019-16561?
Users with specific access in affected versions can bypass SSL/TLS certificate and hostname validation, compromising the security of the Jenkins environment.
The Impact of CVE-2019-16561
This vulnerability can lead to unauthorized access and data interception due to disabled SSL/TLS validation, posing a significant security threat to Jenkins instances.
Technical Details of CVE-2019-16561
Jenkins WebSphere Deployer Plugin versions 1.6.1 and earlier are susceptible to this security flaw.
Vulnerability Description
The issue allows users with Overall/Read access to deactivate SSL/TLS certificate and hostname validation for the entire Jenkins master JVM.
Affected Systems and Versions
- Product: Jenkins WebSphere Deployer Plugin
- Vendor: Jenkins project
- Versions Affected: <= 1.6.1, next of 1.6.1
Exploitation Mechanism
Attackers with the specified access can exploit this vulnerability to disable critical security validations, potentially leading to unauthorized actions within the Jenkins environment.
Mitigation and Prevention
Immediate action and long-term security practices are crucial to mitigate the risks associated with CVE-2019-16561.
Immediate Steps to Take
- Upgrade the Jenkins WebSphere Deployer Plugin to a secure version that addresses this vulnerability.
- Restrict access permissions to minimize the impact of potential exploitation.
Long-Term Security Practices
- Regularly review and update security configurations to prevent similar vulnerabilities.
- Educate users on secure practices to enhance overall system security.
Patching and Updates
Apply security patches and updates provided by Jenkins project to ensure the plugin is secure and free from known vulnerabilities.