CVE-2019-10403 : Security Advisory and Response

Jenkins 2.196 and earlier, LTS 2.176.3 and earlier versions are affected by a stored XSS vulnerability due to improper handling of SCM tag names in the tooltip for SCM tag actions.

Understanding CVE-2019-10403

In versions before Jenkins 2.196 and LTS 2.176.3, a security issue allowed users with control over SCM tag names to exploit a stored XSS vulnerability.

What is CVE-2019-10403?

This CVE refers to a vulnerability in Jenkins versions prior to 2.196 and LTS versions before 2.176.3, where the SCM tag name was not properly handled, leading to a stored XSS vulnerability.

The Impact of CVE-2019-10403

The vulnerability allowed users with control over SCM tag names to execute malicious scripts, potentially compromising the security and integrity of the Jenkins environment.

Technical Details of CVE-2019-10403

Jenkins 2.196 and earlier, LTS 2.176.3 and earlier versions are susceptible to the following:

Vulnerability Description

Improper handling of SCM tag names in the tooltip for SCM tag actions
Stored XSS vulnerability exploitable by users controlling SCM tag names

Affected Systems and Versions

Jenkins versions before 2.196
LTS versions prior to 2.176.3

Exploitation Mechanism

Attackers with control over SCM tag names could inject malicious scripts through the tooltip, leading to stored XSS attacks.

Mitigation and Prevention

It is crucial to take immediate steps to address and prevent the exploitation of CVE-2019-10403:

Immediate Steps to Take

Update Jenkins to version 2.196 or later, LTS 2.176.3 or above to mitigate the vulnerability
Monitor and restrict user permissions related to SCM tag names

Long-Term Security Practices

Regularly review and update Jenkins security configurations
Educate users on secure coding practices and the risks of XSS vulnerabilities

Patching and Updates

Apply security patches and updates provided by Jenkins to address known vulnerabilities