CVE-2022-30948 : Security Advisory and Response

Jenkins Mercurial Plugin 2.16 and earlier versions are affected by a vulnerability that allows attackers to check out some Source Code Management (SCM) repositories stored on the Jenkins controller's file system using local paths as SCM URLs. This can result in attackers obtaining limited information about other projects' SCM contents.

Understanding CVE-2022-30948

This CVE refers to a security vulnerability in Jenkins Mercurial Plugin versions 2.16 and below, enabling attackers with pipeline configuration access to view SCM repositories on the Jenkins controller.

What is CVE-2022-30948?

CVE-2022-30948 involves improper interaction between different entities, notably allowing unauthorized pipeline configuration access to SCM repositories on the Jenkins controller.

The Impact of CVE-2022-30948

The vulnerability enables attackers to gain insights into other projects' SCM contents, potentially leading to unauthorized access and data leakage.

Technical Details of CVE-2022-30948

The following technical aspects are associated with CVE-2022-30948:

Vulnerability Description

Jenkins Mercurial Plugin versions 2.16 and earlier suffer from a flaw that permits attackers to view SCM repositories via local paths as SCM URLs.

Affected Systems and Versions

The vulnerability affects Jenkins Mercurial Plugin versions less than or equal to 2.16, while version 2.15.1 remains unaffected.

Exploitation Mechanism

Malicious actors can exploit the vulnerability by configuring pipelines that allow access to SCM repositories stored on the Jenkins controller's file system using local paths.

Mitigation and Prevention

To address CVE-2022-30948, take the following steps:

Immediate Steps to Take

Update Jenkins Mercurial Plugin to version 2.15.1 or newer.
Restrict pipeline configuration access to prevent unauthorized checkout of SCM repositories.

Long-Term Security Practices

Regularly scan and monitor Jenkins instances for any unauthorized access or unusual activities.
Educate users on secure pipeline configuration practices to minimize the risk of unauthorized access.

Patching and Updates

Stay informed about security advisories from Jenkins project and promptly apply patches or updates to mitigate vulnerabilities.