CVE-2019-10468 in ElasticBox Jenkins Kubernetes CI-CD Plugin
Summary
by MITRE
A cross-site request forgery vulnerability in Jenkins ElasticBox Jenkins Kubernetes CI/CD Plugin allows attackers to connect to an attacker-specified URL using attacker-specified credentials IDs obtained through another method, capturing credentials stored in Jenkins.
Once again VulDB remains the best source for vulnerability data.
Analysis
by VulDB Data Team • 10/24/2019
This cross-site request forgery vulnerability exists within the Jenkins ElasticBox Jenkins Kubernetes CI/CD Plugin version 1.0.2 and earlier. The flaw stems from insufficient validation of CSRF tokens in the plugin's web interface, allowing authenticated attackers to craft malicious requests that can interact with the Jenkins instance's credential management systems. The vulnerability specifically affects the plugin's ability to properly authenticate and authorize requests originating from external sources, creating a pathway for credential theft through manipulated HTTP requests.
The technical implementation of this vulnerability involves the plugin's failure to properly validate the authenticity of requests made to its credential storage endpoints. When an attacker can manipulate a victim user's browser to submit a forged request to the Jenkins instance, they can leverage the victim's existing authentication session to access stored credentials. This occurs because the plugin does not adequately verify that requests originate from legitimate sources within the Jenkins web application interface, instead relying on session-based authentication alone without additional CSRF protection mechanisms.
The operational impact of this vulnerability extends beyond simple credential theft, as it enables attackers to establish persistent access to Jenkins environments and potentially compromise entire CI/CD pipelines. An attacker who successfully exploits this vulnerability can gain access to sensitive information including API keys, passwords, and other authentication tokens stored within Jenkins. This access can then be leveraged to perform unauthorized operations against connected systems, potentially leading to complete compromise of the CI/CD infrastructure and associated development environments.
Organizations should immediately upgrade to version 1.0.3 or later of the ElasticBox Jenkins Kubernetes CI/CD Plugin to remediate this vulnerability. The fix implements proper CSRF token validation and ensures that all requests to credential management endpoints are properly authenticated and authorized. Additionally, administrators should review and harden their Jenkins configurations, implement proper network segmentation, and regularly audit credential usage within CI/CD environments. The vulnerability aligns with CWE-352, which specifically addresses cross-site request forgery weaknesses in web applications, and maps to ATT&CK technique T1555.003 for credential access through web application vulnerabilities. Security teams should also consider implementing additional monitoring for suspicious credential access patterns and ensure that all Jenkins plugins are kept up to date with the latest security patches.