Sandbox Bypass

Jenkins Pipeline is vulnerable to sandbox bypass. It uses the names of Pipeline libraries to create cache directories without any sanitization, allowing attackers with Item/Configure permission to execute arbitrary code in the context of the Jenkins controller JVM using specially crafted library names if a global Pipeline library configured to use caching already exists. A flaw was found in Jenkins. The Pipeline: Shared Groovy Libraries plugin uses the names of Pipeline libraries to create cache directories without any sanitization. This flaw allows attackers with item/configure permission to execute arbitrary code in the context of the Jenkins controller JVM, using specially crafted library names if a global Pipeline library configured to use caching already exists.