CVE-2022-34173 : Security Advisory and Response

This article provides an in-depth analysis of CVE-2022-34173, a vulnerability found in Jenkins versions 2.340 through 2.355 that could lead to a cross-site scripting (XSS) attack.

Understanding CVE-2022-34173

CVE-2022-34173 is a security vulnerability identified in the Jenkins automation server platform that affects versions 2.340 through 2.355. The vulnerability lies in how the tooltip of the build button in list views handles HTML, potentially allowing attackers with Job/Configure permission to exploit it for cross-site scripting attacks.

What is CVE-2022-34173?

In Jenkins versions 2.340 through 2.355, the tooltip for the build button in list views does not properly escape the job display name, enabling attackers with specific permissions to execute cross-site scripting attacks.

The Impact of CVE-2022-34173

This vulnerability could be exploited by malicious actors with Job/Configure permission, allowing them to inject and execute arbitrary scripts within the context of the affected Jenkins instance. Successful exploitation could lead to various security risks, including data theft, unauthorized access, and potential system compromise.

Technical Details of CVE-2022-34173

CVE ID: CVE-2022-34173 CVSS Score: N/A Vector: N/A

Vulnerability Description

The vulnerability arises from the inadequate handling of HTML in the tooltip of the build button, which can be leveraged to execute XSS attacks.

Affected Systems and Versions

Affected Versions: Jenkins versions 2.340 to 2.355 (inclusive)

Exploitation Mechanism

Attackers with Job/Configure permission can exploit the vulnerability by manipulating the job display name in the tooltip to inject malicious scripts.

Mitigation and Prevention

To mitigate the risks associated with CVE-2022-34173, users and administrators are advised to take immediate remediation steps and implement long-term security practices to secure their Jenkins instances.

Immediate Steps to Take

Upgrade Jenkins to a non-vulnerable version beyond 2.355.
Restrict Job/Configure permissions for users to minimize exploitation risk.

Long-Term Security Practices

Regularly monitor and update Jenkins for security patches and fixes.
Train personnel on identifying and mitigating XSS vulnerabilities in web applications.

Patching and Updates

Stay informed about security advisories from the Jenkins project and promptly apply recommended patches and updates to address known vulnerabilities.