CVE-2018-1000056 Explained : Impact and Mitigation

Jenkins JUnit Plugin 1.23 and earlier versions are vulnerable to XML external entity processing, allowing attackers with user permissions to extract confidential information, perform server-side request forgery, or launch denial-of-service attacks.

Understanding CVE-2018-1000056

Jenkins JUnit Plugin 1.23 and earlier versions are susceptible to exploitation through XML external entities during the build process.

What is CVE-2018-1000056?

This CVE refers to a vulnerability in Jenkins JUnit Plugin versions 1.23 and earlier that enables attackers with user permissions in Jenkins to extract sensitive data, conduct server-side request forgery, or initiate denial-of-service attacks.

The Impact of CVE-2018-1000056

The vulnerability allows malicious users to compromise the confidentiality of information stored in the Jenkins master, potentially leading to server-side request forgery and denial-of-service attacks.

Technical Details of CVE-2018-1000056

Jenkins JUnit Plugin 1.23 and earlier versions are affected by a security flaw related to XML external entity processing.

Vulnerability Description

The vulnerability arises from the improper handling of XML external entities during the parsing of files by Jenkins JUnit Plugin, providing an avenue for attackers to exploit the system.

Affected Systems and Versions

Product: Jenkins JUnit Plugin
Vendor: Jenkins
Versions affected: 1.23 and earlier

Exploitation Mechanism

Attackers with user permissions in Jenkins can leverage the vulnerability to extract confidential data, execute server-side request forgery, or launch denial-of-service attacks.

Mitigation and Prevention

Immediate Steps to Take:

Update Jenkins JUnit Plugin to the latest version to patch the vulnerability.
Restrict user permissions in Jenkins to minimize the risk of exploitation. Long-Term Security Practices:
Regularly monitor and audit Jenkins configurations and plugins for security vulnerabilities.
Educate users on safe coding practices and the importance of secure configurations. Patch and Updates:
Apply security patches promptly to Jenkins and its associated plugins to address known vulnerabilities.