CVE-2019-10352 : Vulnerability Insights and Analysis

Jenkins versions 2.185 and earlier, LTS versions 2.176.1 and earlier, are affected by a path traversal vulnerability that allows attackers to perform arbitrary file writes on the Jenkins master.

Understanding CVE-2019-10352

This CVE involves a security vulnerability in Jenkins that could be exploited by attackers with specific permissions to write files outside the intended directory.

What is CVE-2019-10352?

A path traversal vulnerability in Jenkins versions 2.185 and earlier, LTS versions 2.176.1 and earlier, allows attackers with Job/Configure permission to specify a file parameter with a filename outside the intended directory, potentially leading to arbitrary file writes on the Jenkins master.

The Impact of CVE-2019-10352

This vulnerability could be exploited by malicious actors to compromise the integrity and security of Jenkins instances, potentially leading to unauthorized access and data manipulation.

Technical Details of CVE-2019-10352

This section provides more in-depth technical insights into the vulnerability.

Vulnerability Description

The vulnerability exists in the file FileParameterValue.java located in the core/src/main/java/hudson/model/ directory of Jenkins, enabling attackers to write files outside the intended directory.

Affected Systems and Versions

Jenkins versions 2.185 and earlier
LTS versions 2.176.1 and earlier

Exploitation Mechanism

Attackers with Job/Configure permission can exploit this vulnerability by specifying a file parameter with a filename outside the intended directory, allowing them to perform arbitrary file writes on the Jenkins master.

Mitigation and Prevention

It is crucial to take immediate steps to address and prevent the exploitation of this vulnerability.

Immediate Steps to Take

Update Jenkins to the latest patched version that addresses this vulnerability.
Restrict Job/Configure permissions to trusted users only.

Long-Term Security Practices

Regularly monitor and audit Jenkins configurations and permissions.
Educate users on secure file handling practices to prevent similar vulnerabilities.

Patching and Updates

Ensure timely application of security patches and updates provided by Jenkins to mitigate the risk of exploitation.