CVE-2019-10353 : Security Advisory and Response

In previous versions of Jenkins, specifically 2.185 and earlier, and LTS 2.176.1 and earlier, a vulnerability existed where CSRF tokens did not have an expiration time. This flaw could allow attackers to bypass CSRF protection.

Understanding CVE-2019-10353

This CVE entry pertains to a security vulnerability in Jenkins that could be exploited by attackers to circumvent Cross-Site Request Forgery (CSRF) protection mechanisms.

What is CVE-2019-10353?

CVE-2019-10353 is a vulnerability in Jenkins versions 2.185 and earlier, as well as LTS 2.176.1 and earlier, where CSRF tokens lacked expiration, enabling potential attackers to bypass CSRF protection.

The Impact of CVE-2019-10353

The vulnerability in Jenkins could allow malicious actors to acquire CSRF tokens and use them to bypass CSRF protection, potentially leading to unauthorized actions within the Jenkins environment.

Technical Details of CVE-2019-10353

This section provides more in-depth technical insights into the CVE-2019-10353 vulnerability.

Vulnerability Description

The CSRF tokens in Jenkins versions 2.185 and earlier, as well as LTS 2.176.1 and earlier, did not have an expiration time, which could be exploited by attackers to evade CSRF protection.

Affected Systems and Versions

Product: Jenkins
Vendor: Jenkins project
Vulnerable Versions: 2.185 and earlier, LTS 2.176.1 and earlier

Exploitation Mechanism

Attackers could exploit this vulnerability by acquiring CSRF tokens from affected Jenkins instances and using them to bypass CSRF protection mechanisms.

Mitigation and Prevention

To address and prevent the CVE-2019-10353 vulnerability in Jenkins, consider the following mitigation strategies:

Immediate Steps to Take

Upgrade Jenkins to a non-vulnerable version that includes a fix for the CSRF token expiration issue.
Monitor and restrict access to Jenkins to prevent unauthorized token acquisition.

Long-Term Security Practices

Implement regular security audits and vulnerability assessments on Jenkins installations.
Educate users on secure coding practices and the importance of CSRF protection.

Patching and Updates

Apply security patches and updates provided by Jenkins to ensure the CSRF token expiration issue is resolved.