CVE-2023-24456 Explained : Impact and Mitigation

This is a published CVE with the ID CVE-2023-24456 assigned by Jenkins on January 24, 2023. The vulnerability affects the Jenkins Keycloak Authentication Plugin, specifically versions 2.3.0 and earlier.

Understanding CVE-2023-24456

This CVE involves a security issue in the Jenkins Keycloak Authentication Plugin, where version 2.3.0 and earlier fail to invalidate the previous session upon login.

What is CVE-2023-24456?

CVE-2023-24456 is a vulnerability in the Jenkins Keycloak Authentication Plugin that allows an attacker to potentially gain unauthorized access by exploiting the failure to invalidate the previous session during login.

The Impact of CVE-2023-24456

This vulnerability could lead to unauthorized access to Jenkins instances utilizing the Keycloak Authentication Plugin version 2.3.0 and earlier. Attackers could exploit this to gain sensitive information or perform malicious activities within the Jenkins environment.

Technical Details of CVE-2023-24456

The following technical details shed light on the vulnerability associated with CVE-2023-24456:

Vulnerability Description

The vulnerability lies in the failure of Jenkins Keycloak Authentication Plugin version 2.3.0 and earlier to properly invalidate the previous user session upon login, potentially allowing unauthorized access.

Affected Systems and Versions

The Jenkins Keycloak Authentication Plugin versions impacted include 2.3.0 and earlier. Systems that have not updated to a secure version may remain vulnerable to exploitation.

Exploitation Mechanism

An attacker could exploit this vulnerability by leveraging the failure to invalidate the previous session upon login. This could enable unauthorized access and pose a security risk to Jenkins instances.

Mitigation and Prevention

It is crucial to take immediate action to mitigate the risks associated with CVE-2023-24456 by following these security measures:

Immediate Steps to Take

Upgrade to a secure version of the Jenkins Keycloak Authentication Plugin that addresses this vulnerability.
Monitor and validate user sessions to detect any unauthorized access.
Implement strong authentication mechanisms and access controls to mitigate security risks.

Long-Term Security Practices

Regularly update software and plugins to ensure protection against known vulnerabilities.
Conduct security assessments and audits to identify and address potential weaknesses in the Jenkins environment.
Educate users and administrators on best practices for secure authentication and session management.

Patching and Updates

Stay informed about security advisories and patches released by Jenkins to address vulnerabilities like CVE-2023-24456. Promptly apply updates to secure your Jenkins environment against potential threats.