CVE-2023-41938: Jenkins Ivy Plugin 2.5 and Earlier CSRF Vulnerability Allows Attackers to Delete Disabled Modules

The Jenkins Ivy Plugin 2.5 and earlier versions are affected by a critical vulnerability, CVE-2023-41938, that exposes your system to potential cross-site request forgery (CSRF) attacks. This security exploit enables attackers to delete disabled modules in the targeted systems. In this article, we provide an overview of this vulnerability, the affected versions, and suggested mitigations.

Description

A CSRF vulnerability in Jenkins Ivy Plugin 2.5 and earlier versions allows cybercriminals to conduct malicious activities on behalf of the targeted user. This specific vulnerability exposes the Jenkins system to unauthorized deletion of disabled modules. With the lack of proper request validation, attackers can exploit this loophole by tricking users into clicking a specially crafted link or visiting malicious websites.

Here is an example of a vulnerable delete request in the Jenkins Ivy Plugin

// Code snippet showing vulnerable delete request in Jenkins Ivy Plugin 2.5
public void doDeleteModule(StaplerRequest req, StaplerResponse rsp) throws IOException {
  getPlugin().deleteModule(name);
  rsp.sendRedirect(".");
}

Notice that there is no CSRF protection mechanism in place to validate the authenticity and integrity of the incoming requests.

References

- Original Security Advisory: here
- CVE Details: here
- Jenkins Ivy Plugin: here

Exploit Details

An attacker can exploit this vulnerability by crafting a link or embedding malicious code into websites to induce users to click on it or load the site. Once the user clicks the link or visits the malicious site, the CSRF attack is triggered, allowing the attacker to perform unauthorized actions, such as deleting disabled modules, without the user's consent.

Mitigation

To protect your system from this vulnerability, we strongly recommend updating your Jenkins Ivy Plugin to the latest version, which contains the necessary security patches and improvements. You can follow the steps below to update your plugin:

Regularly update your Jenkins server and plugins.

- Educate users about potential phishing attacks and encourage them to be cautious about clicking suspicious links or visiting untrusted websites.

Conclusion

In conclusion, CVE-2023-41938 is a high-risk CSRF vulnerability present in Jenkins Ivy Plugin 2.5 and earlier versions. It allows attackers to delete disabled modules without proper authorization. To safeguard your system and avoid potential security threats, we highly recommend updating your Jenkins Ivy Plugin to the latest version and following the best security practices mentioned earlier in this article.

Timeline

Published on: 09/06/2023 13:15:00 UTC
Last modified on: 09/11/2023 17:52:00 UTC