CVE-2020-2306 Explained : Impact and Mitigation

A missing permission check in Jenkins Mercurial Plugin 2.11 and earlier allows attackers with Overall/Read permission to obtain a list of names of configured Mercurial installations.

Understanding CVE-2020-2306

This CVE identifies a vulnerability in the Jenkins Mercurial Plugin that could be exploited by attackers with specific permissions.

What is CVE-2020-2306?

The vulnerability in Jenkins Mercurial Plugin versions 2.11 and earlier enables attackers with Overall/Read permission to access a list of configured Mercurial installations.

The Impact of CVE-2020-2306

The vulnerability could lead to unauthorized access to sensitive information and potentially compromise the security of the Jenkins environment.

Technical Details of CVE-2020-2306

The technical aspects of the CVE provide insights into the specific vulnerability and its implications.

Vulnerability Description

A missing permission check in Jenkins Mercurial Plugin versions 2.11 and earlier allows unauthorized users to retrieve a list of configured Mercurial installations.

Affected Systems and Versions

Product: Jenkins Mercurial Plugin
Vendor: Jenkins project
Affected Versions: <= 2.11 (custom version), 2.10.1, 2.9.1, 2.8.1

Exploitation Mechanism

Attackers with Overall/Read permission can exploit the vulnerability to gather information on configured Mercurial installations.

Mitigation and Prevention

Effective measures to mitigate the vulnerability and prevent potential exploitation.

Immediate Steps to Take

Upgrade Jenkins Mercurial Plugin to a secure version beyond 2.11.
Restrict Overall/Read permissions to authorized users only.

Long-Term Security Practices

Regularly review and update permissions within Jenkins to follow the principle of least privilege.
Conduct security audits to identify and address similar authorization issues.

Patching and Updates

Apply patches and updates provided by Jenkins project to address the vulnerability and enhance security measures.