CVE-2017-1000389 : Exploit Details and Defense Strategies

Jenkins global-build-stats plugin versions 1.4 and earlier were susceptible to potential cross-site scripting and cross-site request forgery vulnerabilities.

Understanding CVE-2017-1000389

The Jenkins global-build-stats plugin had URLs that could lead to security risks due to improper handling of JSON responses and lack of request method enforcement.

What is CVE-2017-1000389?

The earlier versions of the Jenkins global-build-stats plugin, specifically version 1.4 and below, had certain URL links that produced a JSON response containing request parameters. These responses were classified as Content Type: text/html, which meant that they could be misinterpreted as HTML by clients. This situation posed a risk of potential reflected cross-site scripting vulnerability. Moreover, some of the URLs provided by the global-build-stats plugin, which were responsible for data modifications, did not enforce the requirement of sending POST requests. This introduced a potential vulnerability of cross-site request forgery.

The Impact of CVE-2017-1000389

Allowed for potential reflected cross-site scripting attacks
Introduced a risk of cross-site request forgery vulnerabilities

Technical Details of CVE-2017-1000389

The technical aspects of the vulnerability.

Vulnerability Description

Jenkins global-build-stats plugin versions 1.4 and earlier mishandled JSON responses, potentially leading to cross-site scripting.

Affected Systems and Versions

Jenkins global-build-stats plugin versions 1.4 and below

Exploitation Mechanism

Improper handling of JSON responses and lack of enforcement of request methods

Mitigation and Prevention

Steps to address and prevent the vulnerability.

Immediate Steps to Take

Upgrade Jenkins global-build-stats plugin to a non-vulnerable version
Implement security best practices for web applications

Long-Term Security Practices

Regularly update and patch Jenkins and its plugins
Conduct security audits and testing to identify vulnerabilities

Patching and Updates

Apply patches and updates provided by Jenkins to address the security issues