CVE-2020-2136: Jenkins Git Plugin - Stored Cross-Site Scripting Vulnerability
Summary
CVE-2020-2136: Improper Neutralization of Input During Web Page Generation in Jenkins Git Plugin. Affects org.jenkins-ci.plugins:git versions < 4.2.1. Fixed in 4.2.1. How to fix ↓
Check if this vulnerability affects your application
Upload a manifest or SBOM and we'll show whether you're affected, plus every other risky package in the same scan.
No signup required · Results in about 60 seconds
Background
The Jenkins Git Plugin is a Maven package that provides integration between Jenkins and Git repositories. It allows users to configure Jenkins jobs to interact with Git repositories, enabling continuous integration and deployment workflows. The plugin supports various Git providers, including Microsoft TFS. However, versions 4.2.0 and earlier of the plugin are vulnerable to a stored cross-site scripting (XSS) vulnerability in the repository URL for Microsoft TFS field form validation.
Vulnerability Detail
The vulnerability arises due to the lack of proper input sanitization in the error message for the repository URL field validation. An attacker can exploit this by injecting malicious scripts into the repository URL, which will be executed when the error message is rendered. This can lead to arbitrary code execution in the context of the victim's browser, potentially compromising sensitive information or performing unauthorized actions.
How To Fix
Minimum fixed version
4.2.1
This is the first release that contains the fix.
Tip — Not sure which version your app runs? Vulert can match this fix to it. Scan free →
Workaround
As a temporary workaround, users can manually escape the error message by modifying the affected code in the plugin. The following code snippet demonstrates the necessary changes:
// Original code
String errorMessage = getErrorMessage();
// Workaround code
String escapedErrorMessage = escapeHtml(errorMessage);
Conclusion
The Jenkins Git Plugin versions 4.2.0 and earlier are vulnerable to a stored cross-site scripting (XSS) vulnerability. This can be exploited by injecting malicious scripts into the repository URL, leading to arbitrary code execution in the victim's browser. Users should upgrade to version 4.2.1 or later of the plugin to mitigate this vulnerability. Vulert can help in monitoring and alerting for such vulnerabilities in real-time. For further assistance or support in vulnerability remediation, please contact DevNack.com.
See every vulnerability recorded for org.jenkins-ci.plugins:git →
FAQ
The vulnerability allows an attacker to execute arbitrary code in the victim's browser, potentially leading to unauthorized actions or the theft of sensitive information.
Versions 4.2.0 and earlier of the Jenkins Git Plugin are affected by this vulnerability.
There is no known exploit for this vulnerability at the time of this report. However, it is advisable to apply the recommended fixes to mitigate the risk.
There are no reported incidents related to this vulnerability at the time of this report.
Yes, Vulert can detect this vulnerability by analyzing the pom.xml file of the affected application. It provides real-time monitoring and alerts for open-source vulnerabilities, including this one.
References
Related vulnerabilities
Recent vulnerabilities recorded for org.jenkins-ci.plugins:git.
