CVE-2019-10309 : Exploit Details and Defense Strategies
Learn about CVE-2019-10309, a vulnerability in Jenkins Self-Organizing Swarm Plug-in Modules Plugin allowing unauthorized access to confidential files. Find mitigation steps and prevention measures.
Jenkins Self-Organizing Swarm Plug-in Modules Plugin vulnerability
Understanding CVE-2019-10309
A vulnerability in the Jenkins Self-Organizing Swarm Plug-in Modules Plugin allows unauthorized attackers to access confidential files from Swarm clients.
What is CVE-2019-10309?
The Plugin modules of the Jenkins Self-Organizing Swarm use UDP broadcasts to identify Jenkins masters. The vulnerability lies in the lack of prevention of XML External Entity processing during response handling, enabling unauthorized access to sensitive files.
The Impact of CVE-2019-10309
Unauthorized attackers on the same network can exploit this flaw to gain access to confidential files from Swarm clients, potentially leading to data breaches and unauthorized information disclosure.
Technical Details of CVE-2019-10309
Vulnerability Description
The vulnerability in the Jenkins Self-Organizing Swarm Plug-in Modules Plugin allows unauthorized access to confidential files by not preventing XML External Entity processing during response handling.
Affected Systems and Versions
- Product: Jenkins Self-Organizing Swarm Plug-in Modules Plugin
- Vendor: Jenkins project
- Versions Affected: 3.15 and earlier
Exploitation Mechanism
Unauthorized attackers on the same network can exploit this vulnerability by leveraging UDP broadcasts to discover Jenkins masters and gain access to confidential files from Swarm clients.
Mitigation and Prevention
Immediate Steps to Take
- Update the Jenkins Self-Organizing Swarm Plug-in Modules Plugin to the latest version that includes a patch for this vulnerability.
- Implement network segmentation to restrict access to sensitive files.
Long-Term Security Practices
- Regularly monitor and audit network traffic for any suspicious activities.
- Educate users on best practices for network security and file access permissions.
Patching and Updates
- Stay informed about security advisories from Jenkins project and promptly apply patches and updates to mitigate known vulnerabilities.