CVE-2019-10377 : Vulnerability Insights and Analysis

Jenkins Avatar Plugin versions 1.2 and earlier are vulnerable to an exploit that allows attackers with Overall/Read access to modify any Jenkins user's avatar.

Understanding CVE-2019-10377

This CVE identifies a missing permission check in the Jenkins Avatar Plugin, enabling unauthorized users to change avatars.

What is CVE-2019-10377?

The vulnerability in Jenkins Avatar Plugin versions 1.2 and below permits attackers with specific access to alter user avatars.

The Impact of CVE-2019-10377

Attackers with Overall/Read access can manipulate Jenkins user avatars due to the lack of a permission check in affected plugin versions.

Technical Details of CVE-2019-10377

The technical aspects of this CVE include:

Vulnerability Description

A permission check absence in Jenkins Avatar Plugin 1.2 and earlier allows unauthorized avatar modifications.

Affected Systems and Versions

Product: Jenkins Avatar Plugin
Vendor: Jenkins project
Vulnerable Versions: 1.2 and earlier

Exploitation Mechanism

Attackers with Overall/Read access exploit the vulnerability to change any Jenkins user's avatar.

Mitigation and Prevention

To address CVE-2019-10377, consider the following steps:

Immediate Steps to Take

Upgrade Jenkins Avatar Plugin to a non-vulnerable version.
Restrict Overall/Read access to authorized personnel only.

Long-Term Security Practices

Regularly review and update Jenkins plugins for security patches.
Implement the principle of least privilege to limit user access.

Patching and Updates

Ensure timely installation of security patches and updates to prevent exploitation of known vulnerabilities.