CVE-2023-41944 is a vulnerability discovered in the Jenkins AWS CodeCommit Trigger Plugin versions 3..12 and earlier. This security advisory addresses the HTML injection vulnerability that exposes the queue name parameter, leaving the system susceptible to potential attacks and data leaks. In this post, we will discuss the details of this vulnerability and provide crucial information on how to mitigate the risk associated with it.

Vulnerability Details

The Jenkins AWS CodeCommit Trigger Plugin is designed to automate the processing of code changes in the AWS CodeCommit repository with Jenkins. However, versions 3..12 and earlier of this plugin failed to properly escape the queue name parameter when rendering an error message. This oversight results in a vulnerability that allows for HTML injection.

An attacker can exploit this HTML injection vulnerability by passing malicious HTML code within the queue name parameter. Once rendered, the malicious code will execute in the context of the user's browser, potentially leading to data leaks, hijacking user sessions, and redirecting users to compromised websites.

Here's a basic example to demonstrate the issue

<!-- Malicious code sent through the queue name parameter -->
<script>
  alert('This is a vulnerability demonstration');
</script>

Original References

The vulnerability was discovered by security researchers and has been documented in the following sources:

- Jenkins Security Advisory 2023-01-19
- CVE-2023-41944 Official Entry
- National Vulnerability Database Entry

Exploit Details

The exploitation process requires an attacker to have access to Jenkins and be able to modify the queue name parameter within the AWS CodeCommit Trigger Plugin. Due to the nature of the vulnerability, the attacker can potentially inject malicious JavaScript code, leading to the execution of that code whenever the affected component displays an error message.

Mitigation Measures

To protect your system from this vulnerability, it is recommended that you immediately update the Jenkins AWS CodeCommit Trigger Plugin to version 3..13 or later. The latest version includes a fix that ensures proper escaping of the queue name parameter, thereby eliminating the HTML injection risk.

Click the "Update Now" button at the bottom.

Once the update is complete, your Jenkins instance will now be safeguarded against the CVE-2023-41944 vulnerability.

Conclusion

By addressing the HTML injection vulnerability in Jenkins AWS CodeCommit Trigger Plugin 3..12 and earlier versions, you help protect your systems from potential data leaks, hijacking user sessions, and malicious redirects. Ensure your plugins are up-to-date and consistently monitor for new security advisories so you can continually maintain a secure environment for your users.

Timeline

Published on: 09/06/2023 13:15:00 UTC
Last modified on: 09/11/2023 18:37:00 UTC